umd_host_spec.ts

/**
 * @license
 * Copyright Google LLC All Rights Reserved.
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://angular.io/license
 */

import * as ts from 'typescript';

import {absoluteFrom, getFileSystem, getSourceFileOrError} from '../../../src/ngtsc/file_system';
import {runInEachFileSystem, TestFile} from '../../../src/ngtsc/file_system/testing';
import {MockLogger} from '../../../src/ngtsc/logging/testing';
import {ClassMemberKind, ConcreteDeclaration, CtorParameter, DownleveledEnum, Import, InlineDeclaration, isNamedClassDeclaration, isNamedFunctionDeclaration, isNamedVariableDeclaration, KnownDeclaration, TypeScriptReflectionHost, TypeValueReferenceKind} from '../../../src/ngtsc/reflection';
import {getDeclaration} from '../../../src/ngtsc/testing';
import {loadFakeCore, loadTestFiles} from '../../../test/helpers';
import {DelegatingReflectionHost} from '../../src/host/delegating_host';
import {getIifeBody} from '../../src/host/esm2015_host';
import {NgccReflectionHost} from '../../src/host/ngcc_host';
import {parseStatementForUmdModule, UmdReflectionHost} from '../../src/host/umd_host';
import {BundleProgram} from '../../src/packages/bundle_program';
import {getRootFiles, makeTestBundleProgram} from '../helpers/utils';

import {expectTypeValueReferencesForParameters} from './util';

runInEachFileSystem(() => {
  describe('UmdReflectionHost', () => {
    let _: typeof absoluteFrom;

    let SOME_DIRECTIVE_FILE: TestFile;
    let TOPLEVEL_DECORATORS_FILE: TestFile;
    let CTOR_DECORATORS_ARRAY_FILE: TestFile;
    let SIMPLE_ES2015_CLASS_FILE: TestFile;
    let SIMPLE_CLASS_FILE: TestFile;
    let FOO_FUNCTION_FILE: TestFile;
    let INLINE_EXPORT_FILE: TestFile;
    let INVALID_DECORATORS_FILE: TestFile;
    let INVALID_DECORATOR_ARGS_FILE: TestFile;
    let INVALID_PROP_DECORATORS_FILE: TestFile;
    let INVALID_PROP_DECORATOR_ARGS_FILE: TestFile;
    let INVALID_CTOR_DECORATORS_FILE: TestFile;
    let INVALID_CTOR_DECORATOR_ARGS_FILE: TestFile;
    let IMPORTS_FILES: TestFile[];
    let EXPORTS_FILES: TestFile[];
    let FUNCTION_BODY_FILE: TestFile;
    let DECORATED_FILES: TestFile[];
    let TYPINGS_SRC_FILES: TestFile[];
    let TYPINGS_DTS_FILES: TestFile[];

    // Helpers
    const createHost = (bundle: BundleProgram, ngccHost: UmdReflectionHost) => {
      const tsHost = new TypeScriptReflectionHost(bundle.program.getTypeChecker());
      return new DelegatingReflectionHost(tsHost, ngccHost);
    };

    beforeEach(() => {
      _ = absoluteFrom;

      SOME_DIRECTIVE_FILE = {
        name: _('/some_directive.umd.js'),
        contents: `
(function (global, factory) {
  typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports, require('@angular/core')) :
  typeof define === 'function' && define.amd ? define('some_directive', ['exports', '@angular/core'], factory) :
  (factory(global.some_directive,global.ng.core));
}(this, (function (exports,core) { 'use strict';

  var INJECTED_TOKEN = new InjectionToken('injected');
  var ViewContainerRef = {};
  var TemplateRef = {};

  var SomeDirective = (function() {
    function SomeDirective(_viewContainer, _template, injected) {
      this.instanceProperty = 'instance';
    }
    SomeDirective.prototype = {
      instanceMethod: function() {},
    };
    SomeDirective.staticMethod = function() {};
    SomeDirective.staticProperty = 'static';
    SomeDirective.decorators = [
      { type: core.Directive, args: [{ selector: '[someDirective]' },] }
    ];
    SomeDirective.ctorParameters = function() { return [
      { type: ViewContainerRef, },
      { type: TemplateRef, },
      { type: undefined, decorators: [{ type: core.Inject, args: [INJECTED_TOKEN,] },] },
    ]; };
    SomeDirective.propDecorators = {
      "input1": [{ type: core.Input },],
      "input2": [{ type: core.Input },],
    };
    return SomeDirective;
  }());
  exports.SomeDirective = SomeDirective;
})));`,
      };

      TOPLEVEL_DECORATORS_FILE = {
        name: _('/toplevel_decorators.umd.js'),
        contents: `
(function (global, factory) {
  typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports, require('@angular/core')) :
  typeof define === 'function' && define.amd ? define('some_directive', ['exports', '@angular/core'], factory) :
  (factory(global.some_directive,global.ng.core));
}(this, (function (exports,core) { 'use strict';

  var INJECTED_TOKEN = new core.InjectionToken('injected');
  var ViewContainerRef = {};
  var TemplateRef = {};

  var SomeDirective = (function() {
    function SomeDirective(_viewContainer, _template, injected) {}
    return SomeDirective;
  }());
  SomeDirective.decorators = [
    { type: core.Directive, args: [{ selector: '[someDirective]' },] }
  ];
  SomeDirective.ctorParameters = function() { return [
    { type: ViewContainerRef, },
    { type: TemplateRef, },
    { type: undefined, decorators: [{ type: core.Inject, args: [INJECTED_TOKEN,] },] },
  ]; };
  SomeDirective.propDecorators = {
    "input1": [{ type: core.Input },],
    "input2": [{ type: core.Input },],
  };
  exports.SomeDirective = SomeDirective;
})));`,
      };

      CTOR_DECORATORS_ARRAY_FILE = {
        name: _('/ctor_decorated_as_array.js'),
        contents: `
        (function (global, factory) {
          typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports, require('@angular/core')) :
          typeof define === 'function' && define.amd ? define('ctor_decorated_as_array', ['exports', '@angular/core'], factory) :
          (factory(global.ctor_decorated_as_array,global.ng.core));
        }(this, (function (exports,core) { 'use strict';
            var CtorDecoratedAsArray = (function() {
            function CtorDecoratedAsArray(arg1) {
            }
            CtorDecoratedAsArray.ctorParameters = [{ type: ParamType, decorators: [{ type: Inject },] }];
            return CtorDecoratedAsArray;
          }());
          exports.CtorDecoratedAsArray = CtorDecoratedAsArray;
        })));`,
      };

      SIMPLE_ES2015_CLASS_FILE = {
        name: _('/simple_es2015_class.d.ts'),
        contents: `
    export class EmptyClass {}
  `,
      };

      SIMPLE_CLASS_FILE = {
        name: _('/simple_class.js'),
        contents: `
(function (global, factory) {
  typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
  typeof define === 'function' && define.amd ? define('simple_class', ['exports'], factory) :
  (factory(global.simple_class));
}(this, (function (exports) { 'use strict';
  var EmptyClass = (function() {
    function EmptyClass() {
    }
    return EmptyClass;
  }());
  var NoParensClass = function() {
    function EmptyClass() {
    }
    return EmptyClass;
  }();
  var InnerParensClass = (function() {
    function EmptyClass() {
    }
    return EmptyClass;
  })();
  var NoDecoratorConstructorClass = (function() {
    function NoDecoratorConstructorClass(foo) {
    }
    return NoDecoratorConstructorClass;
  }());
  var OuterClass1 = (function() {
    function InnerClass1() {
    }
    return InnerClass1;
  }());
  var OuterClass2 = (function() {
    function InnerClass2() {
    }
    InnerClass2_1 = InnerClass12
    var InnerClass2_1;
    return InnerClass2;
  }());
  var SuperClass = (function() { function SuperClass() {} return SuperClass; }());
  var ChildClass = /** @class */ (function (_super) {
    __extends(ChildClass, _super);
    function InnerChildClass() {}
    return InnerChildClass;
  }(SuperClass);
  exports.EmptyClass = EmptyClass;
  exports.NoDecoratorConstructorClass = NoDecoratorConstructorClass;
})));`,
      };

      FOO_FUNCTION_FILE = {
        name: _('/foo_function.js'),
        contents: `
(function (global, factory) {
  typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports, require('@angular/core')) :
  typeof define === 'function' && define.amd ? define('foo_function', ['exports', '@angular/core'], factory) :
  (factory(global.foo_function,global.ng.core));
}(this, (function (exports,core) { 'use strict';
  function foo() {}
  foo.decorators = [
    { type: core.Directive, args: [{ selector: '[ignored]' },] }
  ];
  exports.foo = foo;
})));`,
      };

      INLINE_EXPORT_FILE = {
        name: _('/inline_export.js'),
        contents: `
(function (global, factory) {
  typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports, require('@angular/core')) :
  typeof define === 'function' && define.amd ? define('foo_function', ['exports', '@angular/core'], factory) :
  (factory(global.inline_export,global.ng.core));
}(this, (function (exports,core) { 'use strict';
  function foo() {}
  foo.decorators = [
    { type: core.Directive, args: [{ selector: '[ignored]' },] }
  ];
  exports.directives = [foo];
})));
`,
      };

      INVALID_DECORATORS_FILE = {
        name: _('/invalid_decorators.js'),
        contents: `
(function (global, factory) {
  typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports, require('@angular/core')) :
  typeof define === 'function' && define.amd ? define('invalid_decorators', ['exports', '@angular/core'], factory) :
  (factory(global.invalid_decorators, global.ng.core));
}(this, (function (exports,core) { 'use strict';
  var NotArrayLiteral = (function() {
    function NotArrayLiteral() {
    }
    NotArrayLiteral.decorators = () => [
      { type: core.Directive, args: [{ selector: '[ignored]' },] },
    ];
    return NotArrayLiteral;
  }());

  var NotObjectLiteral = (function() {
    function NotObjectLiteral() {
    }
    NotObjectLiteral.decorators = [
      "This is not an object literal",
      { type: core.Directive },
    ];
    return NotObjectLiteral;
  }());

  var NoTypeProperty = (function() {
    function NoTypeProperty() {
    }
    NoTypeProperty.decorators = [
      { notType: core.Directive },
      { type: core.Directive },
    ];
    return NoTypeProperty;
  }());

  var NotIdentifier = (function() {
    function NotIdentifier() {
    }
    NotIdentifier.decorators = [
      { type: 'StringsLiteralsAreNotIdentifiers' },
      { type: core.Directive },
    ];
    return NotIdentifier;
  }());
})));`,
      };

      INVALID_DECORATOR_ARGS_FILE = {
        name: _('/invalid_decorator_args.js'),
        contents: `
(function (global, factory) {
  typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports, require('@angular/core')) :
  typeof define === 'function' && define.amd ? define('invalid_decorator_args', ['exports', '@angular/core'], factory) :
  (factory(global.invalid_decorator_args, global.ng.core));
}(this, (function (exports,core) { 'use strict';
  var NoArgsProperty = (function() {
    function NoArgsProperty() {
    }
    NoArgsProperty.decorators = [
      { type: core.Directive },
    ];
    return NoArgsProperty;
  }());

  var args = [{ selector: '[ignored]' },];
  var NoPropertyAssignment = (function() {
    function NoPropertyAssignment() {
    }
    NoPropertyAssignment.decorators = [
      { type: core.Directive, args },
    ];
    return NoPropertyAssignment;
  }());

  var NotArrayLiteral = (function() {
    function NotArrayLiteral() {
    }
    NotArrayLiteral.decorators = [
      { type: core.Directive, args: () => [{ selector: '[ignored]' },] },
    ];
    return NotArrayLiteral;
  }());
})));`,
      };

      INVALID_PROP_DECORATORS_FILE = {
        name: _('/invalid_prop_decorators.js'),
        contents: `
(function (global, factory) {
  typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports, require('@angular/core')) :
  typeof define === 'function' && define.amd ? define('invalid_prop_decorators', ['exports', '@angular/core'], factory) :
  (factory(global.invalid_prop_decorators, global.ng.core));
}(this, (function (exports,core) { 'use strict';
  var NotObjectLiteral = (function() {
    function NotObjectLiteral() {
    }
    NotObjectLiteral.propDecorators = () => ({
      "prop": [{ type: core.Directive },]
    });
    return NotObjectLiteral;
  }());

  var NotObjectLiteralProp = (function() {
    function NotObjectLiteralProp() {
    }
    NotObjectLiteralProp.propDecorators = {
      "prop": [
        "This is not an object literal",
        { type: core.Directive },
      ]
    };
    return NotObjectLiteralProp;
  }());

  var NoTypeProperty = (function() {
    function NoTypeProperty() {
    }
    NoTypeProperty.propDecorators = {
      "prop": [
        { notType: core.Directive },
        { type: core.Directive },
      ]
    };
    return NoTypeProperty;
  }());

  var NotIdentifier = (function() {
    function NotIdentifier() {
    }
    NotIdentifier.propDecorators = {
      "prop": [
        { type: 'StringsLiteralsAreNotIdentifiers' },
        { type: core.Directive },
      ]
    };
    return NotIdentifier;
  }());
})));`,
      };

      INVALID_PROP_DECORATOR_ARGS_FILE = {
        name: _('/invalid_prop_decorator_args.js'),
        contents: `
  (function (global, factory) {
    typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports, require('@angular/core')) :
    typeof define === 'function' && define.amd ? define('invalid_prop_decorator_args', ['exports', '@angular/core'], factory) :
    (factory(global.invalid_prop_decorator_args, global.ng.core));
  }(this, (function (exports,core) { 'use strict';
  var NoArgsProperty = (function() {
    function NoArgsProperty() {
    }
    NoArgsProperty.propDecorators = {
      "prop": [{ type: core.Input },]
    };
    return NoArgsProperty;
  }());

  var args = [{ selector: '[ignored]' },];
  var NoPropertyAssignment = (function() {
    function NoPropertyAssignment() {
    }
    NoPropertyAssignment.propDecorators = {
      "prop": [{ type: core.Input, args },]
    };
    return NoPropertyAssignment;
  }());

  var NotArrayLiteral = (function() {
    function NotArrayLiteral() {
    }
    NotArrayLiteral.propDecorators = {
      "prop": [{ type: core.Input, args: () => [{ selector: '[ignored]' },] },],
    };
    return NotArrayLiteral;
  }());
})));`,
      };

      INVALID_CTOR_DECORATORS_FILE = {
        name: _('/invalid_ctor_decorators.js'),
        contents: `
  (function (global, factory) {
    typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports, require('@angular/core')) :
    typeof define === 'function' && define.amd ? define('invalid_ctor_decorators', ['exports', '@angular/core'], factory) :
    (factory(global.invalid_ctor_decorators,global.ng.core));
  }(this, (function (exports,core) { 'use strict';
    var NoParameters = (function() {
    function NoParameters() {}
    return NoParameters;
  }());

  var NotArrayLiteral = (function() {
    function NotArrayLiteral(arg1) {
    }
    NotArrayLiteral.ctorParameters = function() { return 'StringsAreNotArrayLiterals'; };
    return NotArrayLiteral;
  }());

  var NotObjectLiteral = (function() {
    function NotObjectLiteral(arg1, arg2) {
    }
    NotObjectLiteral.ctorParameters = function() { return [
      "This is not an object literal",
      { type: 'ParamType', decorators: [{ type: core.Inject },] },
    ]; };
    return NotObjectLiteral;
  }());

  var NoTypeProperty = (function() {
    function NoTypeProperty(arg1, arg2) {
    }
    NoTypeProperty.ctorParameters = function() { return [
      {
        type: 'ParamType',
        decorators: [
          { notType: core.Inject },
          { type: core.Inject },
        ]
      },
    ]; };
    return NoTypeProperty;
  }());

  var NotIdentifier = (function() {
    function NotIdentifier(arg1, arg2) {
    }
    NotIdentifier.ctorParameters = function() { return [
      {
        type: 'ParamType',
        decorators: [
          { type: 'StringsLiteralsAreNotIdentifiers' },
          { type: core.Inject },
        ]
      },
    ]; };
    return NotIdentifier;
  }());
})));`,
      };

      INVALID_CTOR_DECORATOR_ARGS_FILE = {
        name: _('/invalid_ctor_decorator_args.js'),
        contents: `
  (function (global, factory) {
    typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports, require('@angular/core')) :
    typeof define === 'function' && define.amd ? define('invalid_ctor_decorator_args', ['exports', '@angular/core'], factory) :
    (factory(global.invalid_ctor_decorator_args,global.ng.core));
  }(this, (function (exports,core) { 'use strict';
    var NoArgsProperty = (function() {
    function NoArgsProperty(arg1) {
    }
    NoArgsProperty.ctorParameters = function() { return [
      { type: 'ParamType', decorators: [{ type: core.Inject },] },
    ]; };
    return NoArgsProperty;
  }());

  var args = [{ selector: '[ignored]' },];
  var NoPropertyAssignment = (function() {
    function NoPropertyAssignment(arg1) {
    }
    NoPropertyAssignment.ctorParameters = function() { return [
      { type: 'ParamType', decorators: [{ type: core.Inject, args },] },
    ]; };
    return NoPropertyAssignment;
  }());

  var NotArrayLiteral = (function() {
    function NotArrayLiteral(arg1) {
    }
    NotArrayLiteral.ctorParameters = function() { return [
      { type: 'ParamType', decorators: [{ type: core.Inject, args: () => [{ selector: '[ignored]' },] },] },
    ]; };
    return NotArrayLiteral;
  }());
})));`,
      };

      IMPORTS_FILES = [
        {
          name: _('/index.js'),
          contents: `
          (function (global, factory) {
            typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports, require('./file_a'), require('./file_b'), require('./file_c')) :
            typeof define === 'function' && define.amd ? define('index', ['exports', './file_a', './file_b', './file_c'], factory) :
            (factory(global.index, global.file_a, global.file_b, global.file_c));
          }(this, (function (exports, file_a, file_b, file_c) { 'use strict';
          })));`,
        },
        {
          name: _('/file_a.js'),
          contents: `
(function (global, factory) {
  typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
  typeof define === 'function' && define.amd ? define('file_a', ['exports'], factory) :
  (factory(global.file_a));
}(this, (function (exports) { 'use strict';
  var a = 'a';
  exports.a = a;
})));`,
        },
        {
          name: _('/file_b.js'),
          contents: `
(function (global, factory) {
  typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports, require('./file_a')) :
  typeof define === 'function' && define.amd ? define('file_b', ['exports', './file_a'], factory) :
  (factory(global.file_b,global.file_a));
}(this, (function (exports, file_a) { 'use strict';
  var b = file_a.a;
  var c = 'c';
  var d = c;
})));`,
        },
        {
          name: _('/file_c.js'),
          contents: `
(function (global, factory) {
  typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports, require('./file_a')) :
  typeof define === 'function' && define.amd ? define('file_c', ['exports', 'file_a'], factory) :
  (factory(global.file_c,global.file_a));
}(this, function (exports, file_a) { 'use strict';
  var c = file_a.a;
}));`,
        },
      ];

      EXPORTS_FILES = [
        {
          name: _('/index.js'),
          contents: `(function (global, factory) {\n` +
              `  typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports, require('./a_module'), require('./b_module'), require('./wildcard_reexports'), require('./wildcard_reexports_imported_helpers'), require('./wildcard_reexports_with_require'), require('./define_property_reexports')) :\n` +
              `  typeof define === 'function' && define.amd ? define('index', ['exports', './a_module', './b_module', './wildcard_reexports', './wildcard_reexports_imported_helpers', './wildcard_reexports_with_require', './define_property_reexports'], factory) :\n` +
              `  (factory(global.index, global.a_module, global.b_module, global.wildcard_reexports, global.wildcard_reexports_imported_helpers, global.wildcard_reexports_with_require, global.define_property_reexports));\n` +
              `}(this, (function (exports, a_module, b_module, wildcard_reexports, wildcard_reexports_imported_helpers, wildcard_reexports_with_require, define_property_reexports) { 'use strict';\n` +
              `})));\n`
        },
        {
          name: _('/a_module.js'),
          contents: `(function (global, factory) {\n` +
              `  typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :\n` +
              `  typeof define === 'function' && define.amd ? define('a_module', ['exports'], factory) :\n` +
              `  (factory(global.a_module));\n` +
              `}(this, (function (exports) { 'use strict';\n` +
              `  var a = 'a';\n` +
              `  exports.a = a;\n` +
              `})));\n`,
        },
        {
          name: _('/b_module.js'),
          contents: `(function (global, factory) {\n` +
              `  typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports, require('@angular/core'), require('./a_module')) :\n` +
              `  typeof define === 'function' && define.amd ? define('b_module', ['exports', '@angular/core', './a_module'], factory) :\n` +
              `  (factory(global.b_module));\n` +
              `}(this, (function (exports, core, a_module) { 'use strict';\n` +
              `  var b = a_module.a;\n` +
              `  var e = 'e';\n` +
              `  var SomeClass = (function() {\n` +
              `    function SomeClass() {}\n` +
              `    return SomeClass;\n` +
              `  }());\n` +
              `\n` +
              `  exports.Directive = core.Directive;\n` +
              `  exports.a = a_module.a;\n` +
              `  exports.b = b;\n` +
              `  exports.c = a_module.a;\n` +
              `  exports.d = b;\n` +
              `  exports.e = e;\n` +
              `  exports.DirectiveX = core.Directive;\n` +
              `  exports.SomeClass = SomeClass;\n` +
              `})));\n`,
        },
        {
          name: _('/xtra_module.js'),
          contents: `(function (global, factory) {\n` +
              `  typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :\n` +
              `  typeof define === 'function' && define.amd ? define('xtra_module', ['exports'], factory) :\n` +
              `  (factory(global.xtra_module));\n` +
              `}(this, (function (exports) { 'use strict';\n` +
              `  var xtra1 = 'xtra1';\n` +
              `  var xtra2 = 'xtra2';\n` +
              `  exports.xtra1 = xtra1;\n` +
              `  exports.xtra2 = xtra2;\n` +
              `})));\n`,
        },
        {
          name: _('/wildcard_reexports.js'),
          contents: `(function (global, factory) {\n` +
              `  typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports, require('./b_module'), require('./xtra_module')) :\n` +
              `  typeof define === 'function' && define.amd ? define('wildcard_reexports', ['exports', './b_module', './xtra_module'], factory) :\n` +
              `  (factory(global.wildcard_reexports, b_module, xtra_module));\n` +
              `}(this, (function (exports, b_module, xtra_module) { 'use strict';\n` +
              `  function __export(m) {\n` +
              `    for (var p in m) if (!exports.hasOwnProperty(p)) exports[p] = m[p];\n` +
              `  }\n` +
              `  __export(b_module);\n` +
              `  __export(xtra_module);\n` +
              `})));\n`,
        },
        {
          name: _('/wildcard_reexports_imported_helpers.js'),
          contents: `(function (global, factory) {\n` +
              `  typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports, require('tslib'), require('./b_module'), require('./xtra_module')) :\n` +
              `  typeof define === 'function' && define.amd ? define('wildcard_reexports', ['exports', 'tslib', './b_module', './xtra_module'], factory) :\n` +
              `  (factory(global.wildcard_reexports_imported_helpers, tslib, b_module, xtra_module));\n` +
              `}(this, (function (exports, tslib, b_module, xtra_module) { 'use strict';\n` +
              `  tslib.__exportStar(b_module, exports);\n` +
              `  tslib.__exportStar(xtra_module, exports);\n` +
              `})));\n`,
        },
        {
          name: _('/wildcard_reexports_with_require.js'),
          contents: `(function (global, factory) {\n` +
              `  typeof exports === 'object' && typeof module !== 'undefined' ? factory(require, exports) :\n` +
              `  typeof define === 'function' && define.amd ? define('wildcard_reexports_with_require', ['require', 'exports'], factory);\n` +
              `}(this, (function (require, exports) { 'use strict';\n` +
              `  function __export(m) {\n` +
              `    for (var p in m) if (!exports.hasOwnProperty(p)) exports[p] = m[p];\n` +
              `  }\n` +
              `  var b_module = require('./b_module');\n` +
              `  __export(b_module);\n` +
              `  __export(require('./xtra_module'));\n` +
              `})));\n`,
        },
        {
          name: _('/define_property_reexports.js'),
          contents: `(function (global, factory) {\n` +
              `  typeof exports === 'object' && typeof module !== 'undefined' ? factory(require, exports) :\n` +
              `  typeof define === 'function' && define.amd ? define('define_property_reexports', ['require', 'exports'], factory);\n` +
              `}(this, (function (require, exports) { 'use strict';\n` +
              `var moduleA = require("./a_module");\n` +
              `Object.defineProperty(exports, "newA", { enumerable: true, get: function () { return moduleA.a; } });\n` +
              `})));`,
        },
      ];

      FUNCTION_BODY_FILE = {
        name: _('/function_body.js'),
        contents: `
(function (global, factory) {
  typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
  typeof define === 'function' && define.amd ? define('function_body', ['exports'], factory) :
  (factory(global.function_body));
}(this, (function (exports) { 'use strict';
    function foo(x) {
    return x;
  }
  function bar(x, y) {
    if (y === void 0) { y = 42; }
    return x + y;
  }
  function complex() {
    var x = 42;
    return 42;
  }
  function baz(x) {
    var y;
    if (x === void 0) { y = 42; }
    return y;
  }
  var y;
  function qux(x) {
    if (x === void 0) { y = 42; }
    return y;
  }
  function moo() {
    var x;
    if (x === void 0) { x = 42; }
    return x;
  }
  var x;
  function juu() {
    if (x === void 0) { x = 42; }
    return x;
  }
})));`
      };

      DECORATED_FILES = [
        {
          name: _('/primary.js'),
          contents: `
    (function (global, factory) {
      typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports, require('@angular/core'), require('./secondary')) :
      typeof define === 'function' && define.amd ? define('primary', ['exports', '@angular/core', './secondary'], factory) :
      (factory(global.primary,global.ng.core, global.secondary));
    }(this, (function (exports,core,secondary) { 'use strict';
    var A = (function() {
      function A() {}
      A.decorators = [
        { type: core.Directive, args: [{ selector: '[a]' }] }
      ];
      return A;
    }());
     var B = (function() {
      function B() {}
      B.decorators = [
        { type: core.Directive, args: [{ selector: '[b]' }] }
      ];
      return B;
    }());
     function x() {}
     function y() {}
     var C = (function() {
      function C() {}
      return C;
    });
    exports.A = A;
    exports.x = x;
    exports.C = C;
    })));`
        },
        {
          name: _('/secondary.js'),
          contents: `
    (function (global, factory) {
      typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports, require('@angular/core')) :
      typeof define === 'function' && define.amd ? define('primary', ['exports', '@angular/core'], factory) :
      (factory(global.primary,global.ng.core));
    }(this, (function (exports,core) { 'use strict';
    var D = (function() {
      function D() {}
      D.decorators = [
        { type: core.Directive, args: [{ selector: '[d]' }] }
      ];
      return D;
    }());
    exports.D = D;
  })));
    `
        }
      ];

      TYPINGS_SRC_FILES = [
        {
          name: _('/ep/src/index.js'),
          contents: `
    (function (global, factory) {
      typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports, require('./internal'), require('./class1'), require('./class2'), require('./missing-class'), require('./flat-file'), require('./func1')) :
      typeof define === 'function' && define.amd ? define('index', ['exports', './internal', './class1', './class2', './missing-class', './flat-file', './func1'], factory) :
      (factory(global.index,global.internal,global.class1,global.class2,global.missing_class,global.flat_file,global.func1));
    }(this, (function (exports,internal,class1,class2,missing_class,flat_file,func1) { 'use strict';
      function __export(m) {
        for (var p in m) if (!exports.hasOwnProperty(p)) exports[p] = m[p];
      }
      var InternalClass = internal.InternalClass;
      __export(class1);
      __export(class2);
    })));
    `
        },
        {
          name: _('/ep/src/class1.js'),
          contents: `
    (function (global, factory) {
      typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
      typeof define === 'function' && define.amd ? define('class1', ['exports'], factory) :
      (factory(global.class1));
    }(this, (function (exports) { 'use strict';
      var Class1 = (function() {
        function Class1() {}
        return Class1;
      }());
      var MissingClass1 = (function() {
        function MissingClass1() {}
        return MissingClass1;
      }());
      exports.Class1 = Class1;
      exports.MissingClass1 = MissingClass1;
    })));
    `
        },
        {
          name: _('/ep/src/class2.js'),
          contents: `
    (function (global, factory) {
      typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
      typeof define === 'function' && define.amd ? define('class2', ['exports'], factory) :
      (factory(global.class2));
    }(this, (function (exports) { 'use strict';
      var Class2 = (function() {
        function Class2() {}
        return Class2;
      }());
      exports.Class2 = Class2;
    })));
    `
        },
        {name: _('/ep/src/func1.js'), contents: 'function mooFn() {} export {mooFn}'}, {
          name: _('/ep/src/internal.js'),
          contents: `
    (function (global, factory) {
      typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
      typeof define === 'function' && define.amd ? define('internal', ['exports'], factory) :
      (factory(global.internal));
    }(this, (function (exports) { 'use strict';
      var InternalClass = (function() {
        function InternalClass() {}
        return InternalClass;
      }());
      var Class2 = (function() {
        function Class2() {}
        return Class2;
      }());
      exports.InternalClass =InternalClass;
      exports.Class2 = Class2;
    })));
    `
        },
        {
          name: _('/ep/src/missing-class.js'),
          contents: `
    (function (global, factory) {
      typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
      typeof define === 'function' && define.amd ? define('missingClass', ['exports'], factory) :
      (factory(global.missingClass));
    }(this, (function (exports) { 'use strict';
      var MissingClass2 = (function() {
        function MissingClass2() {}
        return MissingClass2;
      }());
      exports. MissingClass2 = MissingClass2;
    })));
    `
        },
        {
          name: _('/ep/src/flat-file.js'),
          contents: `
    (function (global, factory) {
      typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
      typeof define === 'function' && define.amd ? define('missingClass', ['exports'], factory) :
      (factory(global.missingClass));
    }(this, (function (exports) { 'use strict';
      var Class1 = (function() {
        function Class1() {}
        return Class1;
      }());
      var MissingClass1 = (function() {
        function MissingClass1() {}
        return MissingClass1;
      }());
      var MissingClass2 = (function() {
        function MissingClass2() {}
        return MissingClass2;
      }());
      var SourceClass = (function() {
        function SourceClass() {}
        return SourceClass;
      }());
    exports.Class1 = Class1;
      exports.AliasedClass = SourceClass;
      exports.MissingClass1 = MissingClass1;
      exports.MissingClass2 = MissingClass2;
    })));
    `
        }
      ];

      TYPINGS_DTS_FILES = [
        {
          name: _('/ep/typings/index.d.ts'),
          contents: `
            import '../../an_external_lib/index';
            import {InternalClass} from './internal';
            import {mooFn} from './func1';
            export * from './class1';
            export * from './class2';
            `
        },
        {
          name: _('/ep/typings/class1.d.ts'),
          contents: `export declare class Class1 {}\nexport declare class OtherClass {}`
        },
        {
          name: _('/ep/typings/class2.d.ts'),
          contents: `
            export declare class Class2 {}
            export declare interface SomeInterface {}
            export {TypingsClass as AliasedClass} from './typings-class';
          `
        },
        {name: _('/ep/typings/func1.d.ts'), contents: 'export declare function mooFn(): void;'},
        {
          name: _('/ep/typings/internal.d.ts'),
          contents: `export declare class InternalClass {}\nexport declare class Class2 {}`
        },
        {
          name: _('/ep/typings/typings-class.d.ts'),
          contents: `export declare class TypingsClass {}`
        },
        {name: _('/ep/typings/shadow-class.d.ts'), contents: `export declare class ShadowClass {}`},
        {name: _('/an_external_lib/index.d.ts'), contents: 'export declare class ShadowClass {}'},
      ];
    });

    describe('getDecoratorsOfDeclaration()', () => {
      it('should find the decorators on a class', () => {
        loadTestFiles([SOME_DIRECTIVE_FILE]);
        const bundle = makeTestBundleProgram(SOME_DIRECTIVE_FILE.name);
        const host = createHost(bundle, new UmdReflectionHost(new MockLogger(), false, bundle));
        const classNode = getDeclaration(
            bundle.program, SOME_DIRECTIVE_FILE.name, 'SomeDirective', isNamedVariableDeclaration);
        const decorators = host.getDecoratorsOfDeclaration(classNode)!;

        expect(decorators).toBeDefined();
        expect(decorators.length).toEqual(1);

        const decorator = decorators[0];
        expect(decorator.name).toEqual('Directive');
        expect(decorator.import).toEqual({name: 'Directive', from: '@angular/core'});
        expect(decorator.args!.map(arg => arg.getText())).toEqual([
          '{ selector: \'[someDirective]\' }',
        ]);
      });

      it('should find the decorators on a class at the top level', () => {
        loadTestFiles([TOPLEVEL_DECORATORS_FILE]);
        const bundle = makeTestBundleProgram(TOPLEVEL_DECORATORS_FILE.name);
        const host = createHost(bundle, new UmdReflectionHost(new MockLogger(), false, bundle));
        const classNode = getDeclaration(
            bundle.program, TOPLEVEL_DECORATORS_FILE.name, 'SomeDirective',
            isNamedVariableDeclaration);
        const decorators = host.getDecoratorsOfDeclaration(classNode)!;

        expect(decorators).toBeDefined();
        expect(decorators.length).toEqual(1);

        const decorator = decorators[0];
        expect(decorator.name).toEqual('Directive');
        expect(decorator.import).toEqual({name: 'Directive', from: '@angular/core'});
        expect(decorator.args!.map(arg => arg.getText())).toEqual([
          '{ selector: \'[someDirective]\' }',
        ]);
      });

      it('should return null if the symbol is not a class', () => {
        loadTestFiles([FOO_FUNCTION_FILE]);
        const bundle = makeTestBundleProgram(FOO_FUNCTION_FILE.name);
        const host = createHost(bundle, new UmdReflectionHost(new MockLogger(), false, bundle));
        const functionNode = getDeclaration(
            bundle.program, FOO_FUNCTION_FILE.name, 'foo', isNamedFunctionDeclaration);
        const decorators = host.getDecoratorsOfDeclaration(functionNode);
        expect(decorators).toBe(null);
      });

      it('should return null if there are no decorators', () => {
        loadTestFiles([SIMPLE_CLASS_FILE]);
        const bundle = makeTestBundleProgram(SIMPLE_CLASS_FILE.name);
        const host = createHost(bundle, new UmdReflectionHost(new MockLogger(), false, bundle));
        const classNode = getDeclaration(
            bundle.program, SIMPLE_CLASS_FILE.name, 'EmptyClass', isNamedVariableDeclaration);
        const decorators = host.getDecoratorsOfDeclaration(classNode);
        expect(decorators).toBe(null);
      });

      it('should ignore `decorators` if it is not an array literal', () => {
        loadTestFiles([INVALID_DECORATORS_FILE]);
        const bundle = makeTestBundleProgram(INVALID_DECORATORS_FILE.name);
        const host = createHost(bundle, new UmdReflectionHost(new MockLogger(), false, bundle));
        const classNode = getDeclaration(
            bundle.program, INVALID_DECORATORS_FILE.name, 'NotArrayLiteral',
            isNamedVariableDeclaration);
        const decorators = host.getDecoratorsOfDeclaration(classNode);
        expect(decorators).toEqual([]);
      });

      it('should ignore decorator elements that are not object literals', () => {
        loadTestFiles([INVALID_DECORATORS_FILE]);
        const bundle = makeTestBundleProgram(INVALID_DECORATORS_FILE.name);
        const host = createHost(bundle, new UmdReflectionHost(new MockLogger(), false, bundle));
        const classNode = getDeclaration(
            bundle.program, INVALID_DECORATORS_FILE.name, 'NotObjectLiteral',
            isNamedVariableDeclaration);
        const decorators = host.getDecoratorsOfDeclaration(classNode)!;

        expect(decorators.length).toBe(1);
        expect(decorators[0]).toEqual(jasmine.objectContaining({name: 'Directive'}));
      });

      it('should ignore decorator elements that have no `type` property', () => {
        loadTestFiles([INVALID_DECORATORS_FILE]);
        const bundle = makeTestBundleProgram(INVALID_DECORATORS_FILE.name);
        const host = createHost(bundle, new UmdReflectionHost(new MockLogger(), false, bundle));
        const classNode = getDeclaration(
            bundle.program, INVALID_DECORATORS_FILE.name, 'NoTypeProperty',
            isNamedVariableDeclaration);
        const decorators = host.getDecoratorsOfDeclaration(classNode)!;

        expect(decorators.length).toBe(1);
        expect(decorators[0]).toEqual(jasmine.objectContaining({name: 'Directive'}));
      });

      it('should ignore decorator elements whose `type` value is not an identifier', () => {
        loadTestFiles([INVALID_DECORATORS_FILE]);
        const bundle = makeTestBundleProgram(INVALID_DECORATORS_FILE.name);
        const host = createHost(bundle, new UmdReflectionHost(new MockLogger(), false, bundle));
        const classNode = getDeclaration(
            bundle.program, INVALID_DECORATORS_FILE.name, 'NotIdentifier',
            isNamedVariableDeclaration);
        const decorators = host.getDecoratorsOfDeclaration(classNode)!;

        expect(decorators.length).toBe(1);
        expect(decorators[0]).toEqual(jasmine.objectContaining({name: 'Directive'}));
      });

      it('should have import information on decorators', () => {
        loadTestFiles([SOME_DIRECTIVE_FILE]);
        const bundle = makeTestBundleProgram(SOME_DIRECTIVE_FILE.name);
        const host = createHost(bundle, new UmdReflectionHost(new MockLogger(), false, bundle));

        const classNode = getDeclaration(
            bundle.program, SOME_DIRECTIVE_FILE.name, 'SomeDirective', isNamedVariableDeclaration);
        const decorators = host.getDecoratorsOfDeclaration(classNode)!;

        expect(decorators.length).toEqual(1);
        expect(decorators[0].import).toEqual({name: 'Directive', from: '@angular/core'});
      });

      it('should find decorated members on a class at the top level', () => {
        loadTestFiles([TOPLEVEL_DECORATORS_FILE]);
        const bundle = makeTestBundleProgram(TOPLEVEL_DECORATORS_FILE.name);
        const host = createHost(bundle, new UmdReflectionHost(new MockLogger(), false, bundle));
        const classNode = getDeclaration(
            bundle.program, TOPLEVEL_DECORATORS_FILE.name, 'SomeDirective',
            isNamedVariableDeclaration);
        const members = host.getMembersOfClass(classNode);

        const input1 = members.find(member => member.name === 'input1')!;
        expect(input1.kind).toEqual(ClassMemberKind.Property);
        expect(input1.isStatic).toEqual(false);
        expect(input1.decorators!.map(d => d.name)).toEqual(['Input']);

        const input2 = members.find(member => member.name === 'input2')!;
        expect(input2.kind).toEqual(ClassMemberKind.Property);
        expect(input2.isStatic).toEqual(false);
        expect(input1.decorators!.map(d => d.name)).toEqual(['Input']);
      });

      describe('(returned decorators `args`)', () => {
        it('should be an empty array if decorator has no `args` property', () => {
          loadTestFiles([INVALID_DECORATOR_ARGS_FILE]);
          const bundle = makeTestBundleProgram(INVALID_DECORATOR_ARGS_FILE.name);
          const host = createHost(bundle, new UmdReflectionHost(new MockLogger(), false, bundle));
          const classNode = getDeclaration(
              bundle.program, INVALID_DECORATOR_ARGS_FILE.name, 'NoArgsProperty',
              isNamedVariableDeclaration);
          const decorators = host.getDecoratorsOfDeclaration(classNode)!;

          expect(decorators.length).toBe(1);
          expect(decorators[0].name).toBe('Directive');
          expect(decorators[0].args).toEqual([]);
        });

        it('should be an empty array if decorator\'s `args` has no property assignment', () => {
          loadTestFiles([INVALID_DECORATOR_ARGS_FILE]);
          const bundle = makeTestBundleProgram(INVALID_DECORATOR_ARGS_FILE.name);
          const host = createHost(bundle, new UmdReflectionHost(new MockLogger(), false, bundle));
          const classNode = getDeclaration(
              bundle.program, INVALID_DECORATOR_ARGS_FILE.name, 'NoPropertyAssignment',
              isNamedVariableDeclaration);
          const decorators = host.getDecoratorsOfDeclaration(classNode)!;

          expect(decorators.length).toBe(1);
          expect(decorators[0].name).toBe('Directive');
          expect(decorators[0].args).toEqual([]);
        });

        it('should be an empty array if `args` property value is not an array literal', () => {
          loadTestFiles([INVALID_DECORATOR_ARGS_FILE]);
          const bundle = makeTestBundleProgram(INVALID_DECORATOR_ARGS_FILE.name);
          const host = createHost(bundle, new UmdReflectionHost(new MockLogger(), false, bundle));
          const classNode = getDeclaration(
              bundle.program, INVALID_DECORATOR_ARGS_FILE.name, 'NotArrayLiteral',
              isNamedVariableDeclaration);
          const decorators = host.getDecoratorsOfDeclaration(classNode)!;

          expect(decorators.length).toBe(1);
          expect(decorators[0].name).toBe('Directive');
          expect(decorators[0].args).toEqual([]);
        });
      });
    });

    describe('getMembersOfClass()', () => {
      it('should find decorated members on a class', () => {
        loadTestFiles([SOME_DIRECTIVE_FILE]);
        const bundle = makeTestBundleProgram(SOME_DIRECTIVE_FILE.name);
        const host = createHost(bundle, new UmdReflectionHost(new MockLogger(), false, bundle));
        const classNode = getDeclaration(
            bundle.program, SOME_DIRECTIVE_FILE.name, 'SomeDirective', isNamedVariableDeclaration);
        const members = host.getMembersOfClass(classNode);

        const input1 = members.find(member => member.name === 'input1')!;
        expect(input1.kind).toEqual(ClassMemberKind.Property);
        expect(input1.isStatic).toEqual(false);
        expect(input1.decorators!.map(d => d.name)).toEqual(['Input']);

        const input2 = members.find(member => member.name === 'input2')!;
        expect(input2.kind).toEqual(ClassMemberKind.Property);
        expect(input2.isStatic).toEqual(false);
        expect(input1.decorators!.map(d => d.name)).toEqual(['Input']);
      });

      it('should find non decorated properties on a class', () => {
        loadTestFiles([SOME_DIRECTIVE_FILE]);
        const bundle = makeTestBundleProgram(SOME_DIRECTIVE_FILE.name);
        const host = createHost(bundle, new UmdReflectionHost(new MockLogger(), false, bundle));
        const classNode = getDeclaration(
            bundle.program, SOME_DIRECTIVE_FILE.name, 'SomeDirective', isNamedVariableDeclaration);
        const members = host.getMembersOfClass(classNode);

        const instanceProperty = members.find(member => member.name === 'instanceProperty')!;
        expect(instanceProperty.kind).toEqual(ClassMemberKind.Property);
        expect(instanceProperty.isStatic).toEqual(false);
        expect(ts.isBinaryExpression(instanceProperty.implementation!)).toEqual(true);
        expect(instanceProperty.value!.getText()).toEqual(`'instance'`);
      });

      it('should find static methods on a class', () => {
        loadTestFiles([SOME_DIRECTIVE_FILE]);
        const bundle = makeTestBundleProgram(SOME_DIRECTIVE_FILE.name);
        const host = createHost(bundle, new UmdReflectionHost(new MockLogger(), false, bundle));
        const classNode = getDeclaration(
            bundle.program, SOME_DIRECTIVE_FILE.name, 'SomeDirective', isNamedVariableDeclaration);
        const members = host.getMembersOfClass(classNode);

        const staticMethod = members.find(member => member.name === 'staticMethod')!;
        expect(staticMethod.kind).toEqual(ClassMemberKind.Method);
        expect(staticMethod.isStatic).toEqual(true);
        expect(ts.isFunctionExpression(staticMethod.implementation!)).toEqual(true);
      });

      it('should find static properties on a class', () => {
        loadTestFiles([SOME_DIRECTIVE_FILE]);
        const bundle = makeTestBundleProgram(SOME_DIRECTIVE_FILE.name);
        const host = createHost(bundle, new UmdReflectionHost(new MockLogger(), false, bundle));
        const classNode = getDeclaration(
            bundle.program, SOME_DIRECTIVE_FILE.name, 'SomeDirective', isNamedVariableDeclaration);
        const members = host.getMembersOfClass(classNode);

        const staticProperty = members.find(member => member.name === 'staticProperty')!;
        expect(staticProperty.kind).toEqual(ClassMemberKind.Property);
        expect(staticProperty.isStatic).toEqual(true);
        expect(ts.isPropertyAccessExpression(staticProperty.implementation!)).toEqual(true);
        expect(staticProperty.value!.getText()).toEqual(`'static'`);
      });

      it('should throw if the symbol is not a class', () => {
        loadTestFiles([FOO_FUNCTION_FILE]);
        const bundle = makeTestBundleProgram(FOO_FUNCTION_FILE.name);
        const host = createHost(bundle, new UmdReflectionHost(new MockLogger(), false, bundle));
        const functionNode = getDeclaration(
            bundle.program, FOO_FUNCTION_FILE.name, 'foo', isNamedFunctionDeclaration);
        expect(() => {
          host.getMembersOfClass(functionNode);
        }).toThrowError(`Attempted to get members of a non-class: "function foo() {}"`);
      });

      it('should return an empty array if there are no prop decorators', () => {
        loadTestFiles([SIMPLE_CLASS_FILE]);
        const bundle = makeTestBundleProgram(SIMPLE_CLASS_FILE.name);
        const host = createHost(bundle, new UmdReflectionHost(new MockLogger(), false, bundle));
        const classNode = getDeclaration(
            bundle.program, SIMPLE_CLASS_FILE.name, 'EmptyClass', isNamedVariableDeclaration);
        const members = host.getMembersOfClass(classNode);

        expect(members).toEqual([]);
      });

      it('should not process decorated properties in `propDecorators` if it is not an object literal',
         () => {
           loadTestFiles([INVALID_PROP_DECORATORS_FILE]);
           const bundle = makeTestBundleProgram(INVALID_PROP_DECORATORS_FILE.name);
           const host = createHost(bundle, new UmdReflectionHost(new MockLogger(), false, bundle));
           const classNode = getDeclaration(
               bundle.program, INVALID_PROP_DECORATORS_FILE.name, 'NotObjectLiteral',
               isNamedVariableDeclaration);
           const members = host.getMembersOfClass(classNode);

           expect(members.map(member => member.name)).not.toContain('prop');
         });

      it('should ignore prop decorator elements that are not object literals', () => {
        loadTestFiles([INVALID_PROP_DECORATORS_FILE]);
        const bundle = makeTestBundleProgram(INVALID_PROP_DECORATORS_FILE.name);
        const host = createHost(bundle, new UmdReflectionHost(new MockLogger(), false, bundle));
        const classNode = getDeclaration(
            bundle.program, INVALID_PROP_DECORATORS_FILE.name, 'NotObjectLiteralProp',
            isNamedVariableDeclaration);
        const members = host.getMembersOfClass(classNode);
        const prop = members.find(m => m.name === 'prop')!;
        const decorators = prop.decorators!;

        expect(decorators.length).toBe(1);
        expect(decorators[0]).toEqual(jasmine.objectContaining({name: 'Directive'}));
      });

      it('should ignore prop decorator elements that have no `type` property', () => {
        loadTestFiles([INVALID_PROP_DECORATORS_FILE]);
        const bundle = makeTestBundleProgram(INVALID_PROP_DECORATORS_FILE.name);
        const host = createHost(bundle, new UmdReflectionHost(new MockLogger(), false, bundle));
        const classNode = getDeclaration(
            bundle.program, INVALID_PROP_DECORATORS_FILE.name, 'NoTypeProperty',
            isNamedVariableDeclaration);
        const members = host.getMembersOfClass(classNode);
        const prop = members.find(m => m.name === 'prop')!;
        const decorators = prop.decorators!;

        expect(decorators.length).toBe(1);
        expect(decorators[0]).toEqual(jasmine.objectContaining({name: 'Directive'}));
      });
    });

    it('should ignore prop decorator elements whose `type` value is not an identifier', () => {
      loadTestFiles([INVALID_PROP_DECORATORS_FILE]);
      const bundle = makeTestBundleProgram(INVALID_PROP_DECORATORS_FILE.name);
      const host = createHost(bundle, new UmdReflectionHost(new MockLogger(), false, bundle));
      const classNode = getDeclaration(
          bundle.program, INVALID_PROP_DECORATORS_FILE.name, 'NotIdentifier',
          isNamedVariableDeclaration);
      const members = host.getMembersOfClass(classNode);
      const prop = members.find(m => m.name === 'prop')!;
      const decorators = prop.decorators!;

      expect(decorators.length).toBe(1);
      expect(decorators[0]).toEqual(jasmine.objectContaining({name: 'Directive'}));
    });

    it('should have import information on decorators', () => {
      loadTestFiles([SOME_DIRECTIVE_FILE]);
      const bundle = makeTestBundleProgram(SOME_DIRECTIVE_FILE.name);
      const host = createHost(bundle, new UmdReflectionHost(new MockLogger(), false, bundle));

      const classNode = getDeclaration(
          bundle.program, SOME_DIRECTIVE_FILE.name, 'SomeDirective', isNamedVariableDeclaration);
      const decorators = host.getDecoratorsOfDeclaration(classNode)!;

      expect(decorators.length).toEqual(1);
      expect(decorators[0].import).toEqual({name: 'Directive', from: '@angular/core'});
    });

    describe('(returned prop decorators `args`)', () => {
      it('should be an empty array if prop decorator has no `args` property', () => {
        loadTestFiles([INVALID_PROP_DECORATOR_ARGS_FILE]);
        const bundle = makeTestBundleProgram(INVALID_PROP_DECORATOR_ARGS_FILE.name);
        const host = createHost(bundle, new UmdReflectionHost(new MockLogger(), false, bundle));
        const classNode = getDeclaration(
            bundle.program, INVALID_PROP_DECORATOR_ARGS_FILE.name, 'NoArgsProperty',
            isNamedVariableDeclaration);
        const members = host.getMembersOfClass(classNode);
        const prop = members.find(m => m.name === 'prop')!;
        const decorators = prop.decorators!;

        expect(decorators.length).toBe(1);
        expect(decorators[0].name).toBe('Input');
        expect(decorators[0].args).toEqual([]);
      });

      it('should be an empty array if prop decorator\'s `args` has no property assignment', () => {
        loadTestFiles([INVALID_PROP_DECORATOR_ARGS_FILE]);
        const bundle = makeTestBundleProgram(INVALID_PROP_DECORATOR_ARGS_FILE.name);
        const host = createHost(bundle, new UmdReflectionHost(new MockLogger(), false, bundle));
        const classNode = getDeclaration(
            bundle.program, INVALID_PROP_DECORATOR_ARGS_FILE.name, 'NoPropertyAssignment',
            isNamedVariableDeclaration);
        const members = host.getMembersOfClass(classNode);
        const prop = members.find(m => m.name === 'prop')!;
        const decorators = prop.decorators!;

        expect(decorators.length).toBe(1);
        expect(decorators[0].name).toBe('Input');
        expect(decorators[0].args).toEqual([]);
      });

      it('should be an empty array if `args` property value is not an array literal', () => {
        loadTestFiles([INVALID_PROP_DECORATOR_ARGS_FILE]);
        const bundle = makeTestBundleProgram(INVALID_PROP_DECORATOR_ARGS_FILE.name);
        const host = createHost(bundle, new UmdReflectionHost(new MockLogger(), false, bundle));
        const classNode = getDeclaration(
            bundle.program, INVALID_PROP_DECORATOR_ARGS_FILE.name, 'NotArrayLiteral',
            isNamedVariableDeclaration);
        const members = host.getMembersOfClass(classNode);
        const prop = members.find(m => m.name === 'prop')!;
        const decorators = prop.decorators!;

        expect(decorators.length).toBe(1);
        expect(decorators[0].name).toBe('Input');
        expect(decorators[0].args).toEqual([]);
      });
    });

    describe('getConstructorParameters', () => {
      it('should always specify LOCAL type value references for decorated constructor parameter types',
          () => {
            const files = [
              {
                name: _('/node_modules/shared-lib/foo.d.ts'),
                contents: `
    declare class Foo {}
    export {Foo as Bar};
  `,
              },
              {
                name: _('/node_modules/shared-lib/index.d.ts'),
                contents: `
    export {Bar as Baz} from './foo';
  `,
              },
              {
                name: _('/local.js'),
                contents: `
  (function (global, factory) {
    typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
    typeof define === 'function' && define.amd ? define('local', ['exports'], factory) :
    (factory(global.local));
  }(this, (function (exports) { 'use strict';
    var Internal = (function() {
      function Internal() {
      }
      return Internal;
    }());
    exports.External = Internal;
  })));
     `
              },
              {
                name: _('/main.js'),
                contents: `
  (function (global, factory) {
    typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports, require('shared-lib), require('./local')) :
    typeof define === 'function' && define.amd ? define('main', ['exports', 'shared-lib', './local'], factory) :
    (factory(global.main, global.shared, global.local));
  }(this, (function (exports, shared, local) { 'use strict';
    var SameFile = (function() {
      function SameFile() {
      }
      return SameFile;
    }());
    exports.SameFile = SameFile;

    var SomeClass = (function() {
      function SomeClass(arg1, arg2, arg3) {}
      return SomeClass;
    }());
    SomeClass.ctorParameters = function() { return [{ type: shared.Baz }, { type: local.External }, { type: SameFile }]; };
    exports.SomeClass = SomeClass;
  })));
  `,
              },
            ];

            loadTestFiles(files);
            const bundle = makeTestBundleProgram(_('/main.js'));
            const host = createHost(bundle, new UmdReflectionHost(new MockLogger(), false, bundle));
            const classNode = getDeclaration(
                bundle.program, _('/main.js'), 'SomeClass', isNamedVariableDeclaration);

            const parameters = host.getConstructorParameters(classNode)!;

            expect(parameters.map(p => p.name)).toEqual(['arg1', 'arg2', 'arg3']);
            expectTypeValueReferencesForParameters(
                parameters, ['shared.Baz', 'local.External', 'SameFile']);
          });

      it('should find the decorated constructor parameters', () => {
        loadTestFiles([SOME_DIRECTIVE_FILE]);
        const bundle = makeTestBundleProgram(SOME_DIRECTIVE_FILE.name);
        const host = createHost(bundle, new UmdReflectionHost(new MockLogger(), false, bundle));
        const classNode = getDeclaration(
            bundle.program, SOME_DIRECTIVE_FILE.name, 'SomeDirective', isNamedVariableDeclaration);
        const parameters = host.getConstructorParameters(classNode);

        expect(parameters).toBeDefined();
        expect(parameters!.map(parameter => parameter.name)).toEqual([
          '_viewContainer', '_template', 'injected'
        ]);
        expectTypeValueReferencesForParameters(parameters!, [
          'ViewContainerRef',
          'TemplateRef',
          null,
        ]);
      });

      it('should find the decorated constructor parameters at the top level', () => {
        loadTestFiles([TOPLEVEL_DECORATORS_FILE]);
        const bundle = makeTestBundleProgram(TOPLEVEL_DECORATORS_FILE.name);
        const host = createHost(bundle, new UmdReflectionHost(new MockLogger(), false, bundle));
        const classNode = getDeclaration(
            bundle.program, TOPLEVEL_DECORATORS_FILE.name, 'SomeDirective',
            isNamedVariableDeclaration);
        const parameters = host.getConstructorParameters(classNode);

        expect(parameters).toBeDefined();
        expect(parameters!.map(parameter => parameter.name)).toEqual([
          '_viewContainer', '_template', 'injected'
        ]);
        expectTypeValueReferencesForParameters(parameters!, [
          'ViewContainerRef',
          'TemplateRef',
          null,
        ]);
      });

      it('should accept `ctorParameters` as an array', () => {
        loadTestFiles([CTOR_DECORATORS_ARRAY_FILE]);
        const bundle = makeTestBundleProgram(CTOR_DECORATORS_ARRAY_FILE.name);
        const host = createHost(bundle, new UmdReflectionHost(new MockLogger(), false, bundle));
        const classNode = getDeclaration(
            bundle.program, CTOR_DECORATORS_ARRAY_FILE.name, 'CtorDecoratedAsArray',
            isNamedVariableDeclaration);
        const parameters = host.getConstructorParameters(classNode)!;

        expect(parameters).toBeDefined();
        expect(parameters.map(parameter => parameter.name)).toEqual(['arg1']);
        expectTypeValueReferencesForParameters(parameters, ['ParamType']);
      });

      it('should throw if the symbol is not a class', () => {
        loadTestFiles([FOO_FUNCTION_FILE]);
        const bundle = makeTestBundleProgram(FOO_FUNCTION_FILE.name);
        const host = createHost(bundle, new UmdReflectionHost(new MockLogger(), false, bundle));
        const functionNode = getDeclaration(
            bundle.program, FOO_FUNCTION_FILE.name, 'foo', isNamedFunctionDeclaration);
        expect(() => {
          host.getConstructorParameters(functionNode);
        })
            .toThrowError(
                'Attempted to get constructor parameters of a non-class: "function foo() {}"');
      });

      // In ES5 there is no such thing as a constructor-less class
      // it('should return `null` if there is no constructor', () => { });

      it('should return an array even if there are no decorators', () => {
        loadTestFiles([SIMPLE_CLASS_FILE]);
        const bundle = makeTestBundleProgram(SIMPLE_CLASS_FILE.name);
        const host = createHost(bundle, new UmdReflectionHost(new MockLogger(), false, bundle));
        const classNode = getDeclaration(
            bundle.program, SIMPLE_CLASS_FILE.name, 'NoDecoratorConstructorClass',
            isNamedVariableDeclaration);
        const parameters = host.getConstructorParameters(classNode);

        expect(parameters).toEqual(jasmine.any(Array));
        expect(parameters!.length).toEqual(1);
        expect(parameters![0].name).toEqual('foo');
        expect(parameters![0].decorators).toBe(null);
      });

      it('should return an empty array if there are no constructor parameters', () => {
        loadTestFiles([INVALID_CTOR_DECORATORS_FILE]);
        const bundle = makeTestBundleProgram(INVALID_CTOR_DECORATORS_FILE.name);
        const host = createHost(bundle, new UmdReflectionHost(new MockLogger(), false, bundle));
        const classNode = getDeclaration(
            bundle.program, INVALID_CTOR_DECORATORS_FILE.name, 'NoParameters',
            isNamedVariableDeclaration);
        const parameters = host.getConstructorParameters(classNode);

        expect(parameters).toEqual([]);
      });

      // In ES5 there are no arrow functions
      // it('should ignore `ctorParameters` if it is an arrow function', () => { });

      it('should ignore `ctorParameters` if it does not return an array literal', () => {
        loadTestFiles([INVALID_CTOR_DECORATORS_FILE]);
        const bundle = makeTestBundleProgram(INVALID_CTOR_DECORATORS_FILE.name);
        const host = createHost(bundle, new UmdReflectionHost(new MockLogger(), false, bundle));
        const classNode = getDeclaration(
            bundle.program, INVALID_CTOR_DECORATORS_FILE.name, 'NotArrayLiteral',
            isNamedVariableDeclaration);
        const parameters = host.getConstructorParameters(classNode);

        expect(parameters!.length).toBe(1);
        expect(parameters![0]).toEqual(jasmine.objectContaining<CtorParameter>({
          name: 'arg1',
          decorators: null,
        }));
      });

      describe('(returned parameters `decorators`)', () => {
        it('should ignore param decorator elements that are not object literals', () => {
          loadTestFiles([INVALID_CTOR_DECORATORS_FILE]);
          const bundle = makeTestBundleProgram(INVALID_CTOR_DECORATORS_FILE.name);
          const host = createHost(bundle, new UmdReflectionHost(new MockLogger(), false, bundle));
          const classNode = getDeclaration(
              bundle.program, INVALID_CTOR_DECORATORS_FILE.name, 'NotObjectLiteral',
              isNamedVariableDeclaration);
          const parameters = host.getConstructorParameters(classNode);

          expect(parameters!.length).toBe(2);
          expect(parameters![0]).toEqual(jasmine.objectContaining<CtorParameter>({
            name: 'arg1',
            decorators: null,
          }));
          expect(parameters![1]).toEqual(jasmine.objectContaining<CtorParameter>({
            name: 'arg2',
            decorators: jasmine.any(Array) as any
          }));
        });

        it('should ignore param decorator elements that have no `type` property', () => {
          loadTestFiles([INVALID_CTOR_DECORATORS_FILE]);
          const bundle = makeTestBundleProgram(INVALID_CTOR_DECORATORS_FILE.name);
          const host = createHost(bundle, new UmdReflectionHost(new MockLogger(), false, bundle));
          const classNode = getDeclaration(
              bundle.program, INVALID_CTOR_DECORATORS_FILE.name, 'NoTypeProperty',
              isNamedVariableDeclaration);
          const parameters = host.getConstructorParameters(classNode);
          const decorators = parameters![0].decorators!;

          expect(decorators.length).toBe(1);
          expect(decorators[0]).toEqual(jasmine.objectContaining({name: 'Inject'}));
        });

        it('should ignore param decorator elements whose `type` value is not an identifier', () => {
          loadTestFiles([INVALID_CTOR_DECORATORS_FILE]);
          const bundle = makeTestBundleProgram(INVALID_CTOR_DECORATORS_FILE.name);
          const host = createHost(bundle, new UmdReflectionHost(new MockLogger(), false, bundle));
          const classNode = getDeclaration(
              bundle.program, INVALID_CTOR_DECORATORS_FILE.name, 'NotIdentifier',
              isNamedVariableDeclaration);
          const parameters = host.getConstructorParameters(classNode);
          const decorators = parameters![0].decorators!;

          expect(decorators.length).toBe(1);
          expect(decorators[0]).toEqual(jasmine.objectContaining({name: 'Inject'}));
        });

        it('should use `getImportOfIdentifier()` to retrieve import info', () => {
          loadTestFiles([SOME_DIRECTIVE_FILE]);
          const bundle = makeTestBundleProgram(SOME_DIRECTIVE_FILE.name);
          const host = createHost(bundle, new UmdReflectionHost(new MockLogger(), false, bundle));
          const classNode = getDeclaration(
              bundle.program, SOME_DIRECTIVE_FILE.name, 'SomeDirective',
              isNamedVariableDeclaration);
          const mockImportInfo: Import = {from: '@angular/core', name: 'Directive'};
          const spy = spyOn(UmdReflectionHost.prototype, 'getImportOfIdentifier')
                          .and.returnValue(mockImportInfo);

          const parameters = host.getConstructorParameters(classNode);
          const decorators = parameters![2].decorators!;

          expect(decorators.length).toEqual(1);
          expect(decorators[0].import).toBe(mockImportInfo);
        });
      });

      describe('(returned parameters `decorators.args`)', () => {
        it('should be an empty array if param decorator has no `args` property', () => {
          loadTestFiles([INVALID_CTOR_DECORATOR_ARGS_FILE]);
          const bundle = makeTestBundleProgram(INVALID_CTOR_DECORATOR_ARGS_FILE.name);
          const host = createHost(bundle, new UmdReflectionHost(new MockLogger(), false, bundle));
          const classNode = getDeclaration(
              bundle.program, INVALID_CTOR_DECORATOR_ARGS_FILE.name, 'NoArgsProperty',
              isNamedVariableDeclaration);
          const parameters = host.getConstructorParameters(classNode);
          expect(parameters!.length).toBe(1);
          const decorators = parameters![0].decorators!;

          expect(decorators.length).toBe(1);
          expect(decorators[0].name).toBe('Inject');
          expect(decorators[0].args).toEqual([]);
        });

        it('should be an empty array if param decorator\'s `args` has no property assignment',
           () => {
             loadTestFiles([INVALID_CTOR_DECORATOR_ARGS_FILE]);
             const bundle = makeTestBundleProgram(INVALID_CTOR_DECORATOR_ARGS_FILE.name);
             const host =
                 createHost(bundle, new UmdReflectionHost(new MockLogger(), false, bundle));
             const classNode = getDeclaration(
                 bundle.program, INVALID_CTOR_DECORATOR_ARGS_FILE.name, 'NoPropertyAssignment',
                 isNamedVariableDeclaration);
             const parameters = host.getConstructorParameters(classNode);
             const decorators = parameters![0].decorators!;

             expect(decorators.length).toBe(1);
             expect(decorators[0].name).toBe('Inject');
             expect(decorators[0].args).toEqual([]);
           });

        it('should be an empty array if `args` property value is not an array literal', () => {
          loadTestFiles([INVALID_CTOR_DECORATOR_ARGS_FILE]);
          const bundle = makeTestBundleProgram(INVALID_CTOR_DECORATOR_ARGS_FILE.name);
          const host = createHost(bundle, new UmdReflectionHost(new MockLogger(), false, bundle));
          const classNode = getDeclaration(
              bundle.program, INVALID_CTOR_DECORATOR_ARGS_FILE.name, 'NotArrayLiteral',
              isNamedVariableDeclaration);
          const parameters = host.getConstructorParameters(classNode);
          const decorators = parameters![0].decorators!;

          expect(decorators.length).toBe(1);
          expect(decorators[0].name).toBe('Inject');
          expect(decorators[0].args).toEqual([]);
        });
      });

      function getConstructorParameters(
          constructor: string, mode: 'inlined'|'inlined_with_suffix'|'imported' = 'imported') {
        let fileHeaderWithUmd = '';

        switch (mode) {
          case 'imported':
            fileHeaderWithUmd = `
              (function (global, factory) {
                typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports, require('tslib'))) :
                typeof define === 'function' && define.amd ? define('test', ['exports', 'tslib'], factory) :
                    (factory(global.test, global.tslib));
                }(this, (function (exports, tslib) { 'use strict';
            `;
            break;
          case 'inlined':
            fileHeaderWithUmd = `
              (function (global, factory) {
                typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports)) :
                typeof define === 'function' && define.amd ? define('test', ['exports'], factory) :
                    (factory(global.test));
                }(this, (function (exports) { 'use strict';

                  var __spread = (this && this.__spread) || function (...args) { /* ... */ }
            `;
            break;
          case 'inlined_with_suffix':
            fileHeaderWithUmd = `
              (function (global, factory) {
                typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports)) :
                typeof define === 'function' && define.amd ? define('test', ['exports'], factory) :
                    (factory(global.test));
                }(this, (function (exports) { 'use strict';

                  var __spread$1 = (this && this.__spread$1) || function (...args) { /* ... */ }
              `;
            break;
        }

        const file = {
          name: _('/synthesized_constructors.js'),
          contents: `
            ${fileHeaderWithUmd}
                var TestClass = /** @class */ (function (_super) {
                  __extends(TestClass, _super);
                  ${constructor}
                  return TestClass;
                }(null));

                exports.TestClass = TestClass;
              })));
          `,
        };

        loadTestFiles([file]);
        const bundle = makeTestBundleProgram(file.name);
        const host = createHost(bundle, new UmdReflectionHost(new MockLogger(), false, bundle));
        const classNode =
            getDeclaration(bundle.program, file.name, 'TestClass', isNamedVariableDeclaration);
        return host.getConstructorParameters(classNode);
      }

      describe('TS -> ES5: synthesized constructors', () => {
        it('recognizes _this assignment from super call', () => {
          const parameters = getConstructorParameters(`
            function TestClass() {
              var _this = _super !== null && _super.apply(this, arguments) || this;
              _this.synthesizedProperty = null;
              return _this;
            }
          `);

          expect(parameters).toBeNull();
        });

        it('recognizes super call as return statement', () => {
          const parameters = getConstructorParameters(`
            function TestClass() {
              return _super !== null && _super.apply(this, arguments) || this;
            }
          `);

          expect(parameters).toBeNull();
        });

        it('handles the case where a unique name was generated for _super or _this', () => {
          const parameters = getConstructorParameters(`
            function TestClass() {
              var _this_1 = _super_1 !== null && _super_1.apply(this, arguments) || this;
              _this_1._this = null;
              _this_1._super = null;
              return _this_1;
            }
          `);

          expect(parameters).toBeNull();
        });

        it('does not consider constructors with parameters as synthesized', () => {
          const parameters = getConstructorParameters(`
            function TestClass(arg) {
              return _super !== null && _super.apply(this, arguments) || this;
            }
          `);

          expect(parameters!.length).toBe(1);
        });

        it('does not consider manual super calls as synthesized', () => {
          const parameters = getConstructorParameters(`
            function TestClass() {
              return _super.call(this) || this;
            }
          `);

          expect(parameters!.length).toBe(0);
        });

        it('does not consider empty constructors as synthesized', () => {
          const parameters = getConstructorParameters(`function TestClass() {}`);
          expect(parameters!.length).toBe(0);
        });
      });

      // See: https://github.com/angular/angular/issues/38453.
      describe('ES2015 -> ES5: synthesized constructors through TSC downleveling', () => {
        it('recognizes delegate super call using inline spread helper', () => {
          const parameters = getConstructorParameters(
              `
            function TestClass() {
              return _super.apply(this, __spread(arguments)) || this;
            }`,
              'inlined');

          expect(parameters).toBeNull();
        });

        it('recognizes delegate super call using inline spread helper with suffix', () => {
          const parameters = getConstructorParameters(
              `
            function TestClass() {
              return _super.apply(this, __spread$1(arguments)) || this;
            }`,
              'inlined_with_suffix');

          expect(parameters).toBeNull();
        });

        it('recognizes delegate super call using imported spread helper', () => {
          const parameters = getConstructorParameters(
              `
            function TestClass() {
              return _super.apply(this, tslib_1.__spread(arguments)) || this;
            }`,
              'imported');

          expect(parameters).toBeNull();
        });

        describe('with class member assignment', () => {
          it('recognizes delegate super call using inline spread helper', () => {
            const parameters = getConstructorParameters(
                `
              function TestClass() {
                var _this = _super.apply(this, __spread(arguments)) || this;
                _this.synthesizedProperty = null;
                return _this;
              }`,
                'inlined');

            expect(parameters).toBeNull();
          });

          it('recognizes delegate super call using inline spread helper with suffix', () => {
            const parameters = getConstructorParameters(
                `
              function TestClass() {
                var _this = _super.apply(this, __spread$1(arguments)) || this;
                _this.synthesizedProperty = null;
                return _this;
              }`,
                'inlined_with_suffix');

            expect(parameters).toBeNull();
          });

          it('recognizes delegate super call using imported spread helper', () => {
            const parameters = getConstructorParameters(
                `
              function TestClass() {
                var _this = _super.apply(this, tslib_1.__spread(arguments)) || this;
                _this.synthesizedProperty = null;
                return _this;
              }`,
                'imported');

            expect(parameters).toBeNull();
          });
        });

        it('handles the case where a unique name was generated for _super or _this', () => {
          const parameters = getConstructorParameters(
              `
            function TestClass() {
              var _this_1 = _super_1.apply(this, __spread(arguments)) || this;
              _this_1._this = null;
              _this_1._super = null;
              return _this_1;
            }`,
              'inlined');

          expect(parameters).toBeNull();
        });

        it('does not consider constructors with parameters as synthesized', () => {
          const parameters = getConstructorParameters(
              `
            function TestClass(arg) {
              return _super.apply(this, __spread(arguments)) || this;
            }`,
              'inlined');

          expect(parameters!.length).toBe(1);
        });
      });
    });

    describe('getDefinitionOfFunction()', () => {
      it('should return an object describing the function declaration passed as an argument',
         () => {
           loadTestFiles([FUNCTION_BODY_FILE]);
           const bundle = makeTestBundleProgram(FUNCTION_BODY_FILE.name);
           const host = createHost(bundle, new UmdReflectionHost(new MockLogger(), false, bundle));

           const fooNode = getDeclaration(
               bundle.program, FUNCTION_BODY_FILE.name, 'foo', isNamedFunctionDeclaration)!;
           const fooDef = host.getDefinitionOfFunction(fooNode)!;
           expect(fooDef.node).toBe(fooNode);
           expect(fooDef.body!.length).toEqual(1);
           expect(fooDef.body![0].getText()).toEqual(`return x;`);
           expect(fooDef.parameters.length).toEqual(1);
           expect(fooDef.parameters[0].name).toEqual('x');
           expect(fooDef.parameters[0].initializer).toBe(null);

           const barNode = getDeclaration(
               bundle.program, FUNCTION_BODY_FILE.name, 'bar', isNamedFunctionDeclaration)!;
           const barDef = host.getDefinitionOfFunction(barNode)!;
           expect(barDef.node).toBe(barNode);
           expect(barDef.body!.length).toEqual(1);
           expect(ts.isReturnStatement(barDef.body![0])).toBeTruthy();
           expect(barDef.body![0].getText()).toEqual(`return x + y;`);
           expect(barDef.parameters.length).toEqual(2);
           expect(barDef.parameters[0].name).toEqual('x');
           expect(fooDef.parameters[0].initializer).toBe(null);
           expect(barDef.parameters[1].name).toEqual('y');
           expect(barDef.parameters[1].initializer!.getText()).toEqual('42');

           const bazNode = getDeclaration(
               bundle.program, FUNCTION_BODY_FILE.name, 'baz', isNamedFunctionDeclaration)!;
           const bazDef = host.getDefinitionOfFunction(bazNode)!;
           expect(bazDef.node).toBe(bazNode);
           expect(bazDef.body!.length).toEqual(3);
           expect(bazDef.parameters.length).toEqual(1);
           expect(bazDef.parameters[0].name).toEqual('x');
           expect(bazDef.parameters[0].initializer).toBe(null);

           const quxNode = getDeclaration(
               bundle.program, FUNCTION_BODY_FILE.name, 'qux', isNamedFunctionDeclaration)!;
           const quxDef = host.getDefinitionOfFunction(quxNode)!;
           expect(quxDef.node).toBe(quxNode);
           expect(quxDef.body!.length).toEqual(2);
           expect(quxDef.parameters.length).toEqual(1);
           expect(quxDef.parameters[0].name).toEqual('x');
           expect(quxDef.parameters[0].initializer).toBe(null);
         });
    });

    describe('getImportOfIdentifier', () => {
      it('should find the import of an identifier', () => {
        loadTestFiles(IMPORTS_FILES);
        const bundle = makeTestBundleProgram(_('/index.js'));
        const host = createHost(bundle, new UmdReflectionHost(new MockLogger(), false, bundle));
        const variableNode =
            getDeclaration(bundle.program, _('/file_b.js'), 'b', isNamedVariableDeclaration);
        const identifier =
            (variableNode.initializer && ts.isPropertyAccessExpression(variableNode.initializer) &&
             ts.isIdentifier(variableNode.initializer.name)) ?
            variableNode.initializer.name :
            null;

        expect(identifier).not.toBe(null);
        const importOfIdent = host.getImportOfIdentifier(identifier!);
        expect(importOfIdent).toEqual({name: 'a', from: './file_a'});
      });

      it('should return null if the identifier was not imported', () => {
        loadTestFiles(IMPORTS_FILES);
        const bundle = makeTestBundleProgram(_('/index.js'));
        const host = createHost(bundle, new UmdReflectionHost(new MockLogger(), false, bundle));
        const variableNode =
            getDeclaration(bundle.program, _('/file_b.js'), 'd', isNamedVariableDeclaration);
        const importOfIdent = host.getImportOfIdentifier(variableNode.initializer as ts.Identifier);

        expect(importOfIdent).toBeNull();
      });

      it('should handle factory functions not wrapped in parentheses', () => {
        loadTestFiles(IMPORTS_FILES);
        const bundle = makeTestBundleProgram(_('/index.js'));
        const host = createHost(bundle, new UmdReflectionHost(new MockLogger(), false, bundle));
        const variableNode =
            getDeclaration(bundle.program, _('/file_c.js'), 'c', isNamedVariableDeclaration);
        const identifier =
            (variableNode.initializer && ts.isPropertyAccessExpression(variableNode.initializer) &&
             ts.isIdentifier(variableNode.initializer.name)) ?
            variableNode.initializer.name :
            null;

        expect(identifier).not.toBe(null);
        const importOfIdent = host.getImportOfIdentifier(identifier!);
        expect(importOfIdent).toEqual({name: 'a', from: './file_a'});
      });
    });

    describe('getDeclarationOfIdentifier', () => {
      // Helpers
      const createTestForTsHelper =
          (host: NgccReflectionHost, factoryFn: ts.FunctionExpression,
           getHelperDeclaration: (factoryFn: ts.FunctionExpression, name: string) =>
               ts.Declaration) =>
              (varName: string, helperName: string, knownAs: KnownDeclaration,
               viaModule: string|null = null) => {
                const node = getVariableDeclaration(factoryFn, varName);
                const helperIdentifier = getIdentifierFromCallExpression(node);
                const helperDeclaration = host.getDeclarationOfIdentifier(helperIdentifier);

                expect(helperDeclaration).toEqual({
                  known: knownAs,
                  node: getHelperDeclaration(factoryFn, helperName),
                  viaModule,
                  identity: null,
                });
              };

      const getFunctionDeclaration = (factoryFn: ts.FunctionExpression, name: string) =>
          factoryFn.body.statements.filter(ts.isFunctionDeclaration)
              .find(decl => (decl.name !== undefined) && (decl.name.text === name))!;

      const getIdentifierFromCallExpression = (decl: ts.VariableDeclaration) => {
        if (decl.initializer !== undefined && ts.isCallExpression(decl.initializer)) {
          const expr = decl.initializer.expression;
          if (ts.isIdentifier(expr)) return expr;
          if (ts.isPropertyAccessExpression(expr) && ts.isIdentifier(expr.name)) return expr.name;
        }
        throw new Error(`Unable to extract identifier from declaration '${decl.getText()}'.`);
      };

      const getVariableDeclaration = (factoryFn: ts.FunctionExpression, name: string) =>
          factoryFn.body.statements.filter(ts.isVariableStatement)
              .map(stmt => stmt.declarationList.declarations[0])
              .find(decl => ts.isIdentifier(decl.name) && (decl.name.text === name))!;

      it('should return the declaration of a locally defined identifier', () => {
        loadTestFiles([SOME_DIRECTIVE_FILE]);
        const bundle = makeTestBundleProgram(SOME_DIRECTIVE_FILE.name);
        const host = createHost(bundle, new UmdReflectionHost(new MockLogger(), false, bundle));
        const classNode = getDeclaration(
            bundle.program, SOME_DIRECTIVE_FILE.name, 'SomeDirective', isNamedVariableDeclaration);
        const ctrDecorators = host.getConstructorParameters(classNode)!;
        const identifierOfViewContainerRef = (ctrDecorators[0].typeValueReference! as {
                                               kind: TypeValueReferenceKind.LOCAL,
                                               expression: ts.Identifier,
                                               defaultImportStatement: null,
                                             }).expression;

        const expectedDeclarationNode = getDeclaration(
            bundle.program, SOME_DIRECTIVE_FILE.name, 'ViewContainerRef',
            isNamedVariableDeclaration);
        const actualDeclaration = host.getDeclarationOfIdentifier(identifierOfViewContainerRef);
        expect(actualDeclaration).not.toBe(null);
        expect(actualDeclaration!.node).toBe(expectedDeclarationNode);
        expect(actualDeclaration!.viaModule).toBe(null);
        expect((actualDeclaration as ConcreteDeclaration).identity).toBe(null);
      });

      it('should return the correct declaration for an outer alias identifier', () => {
        const PROGRAM_FILE: TestFile = {
          name: _('/test.js'),
          contents: `
            (function (global, factory) {
              typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
              typeof define === 'function' && define.amd ? define('test', ['exports'], factory) :
              (factory(global.test));
            }(this, (function (exports,module) { 'use strict';
              var AliasedClass = AliasedClass_1 = (function () {
                function InnerClass() {
                }
                return InnerClass;
              }());
              var AliasedClass_1;
            })));
          `,
        };

        loadTestFiles([PROGRAM_FILE]);
        const bundle = makeTestBundleProgram(PROGRAM_FILE.name);
        const host = createHost(bundle, new UmdReflectionHost(new MockLogger(), false, bundle));

        const expectedDeclaration = getDeclaration(
            bundle.program, PROGRAM_FILE.name, 'AliasedClass', isNamedVariableDeclaration);
        // Grab the `AliasedClass_1` identifier (which is an alias for `AliasedClass`).
        const aliasIdentifier =
            (expectedDeclaration.initializer as ts.BinaryExpression).left as ts.Identifier;
        const actualDeclaration = host.getDeclarationOfIdentifier(aliasIdentifier);

        expect(aliasIdentifier.getText()).toBe('AliasedClass_1');
        expect(actualDeclaration).not.toBe(null);
        expect(actualDeclaration!.node).toBe(expectedDeclaration);
      });

      it('should return the source-file of an import namespace', () => {
        loadFakeCore(getFileSystem());
        loadTestFiles([SOME_DIRECTIVE_FILE]);
        const bundle = makeTestBundleProgram(SOME_DIRECTIVE_FILE.name);
        const host = createHost(bundle, new UmdReflectionHost(new MockLogger(), false, bundle));
        const classNode = getDeclaration(
            bundle.program, SOME_DIRECTIVE_FILE.name, 'SomeDirective', isNamedVariableDeclaration);
        const classDecorators = host.getDecoratorsOfDeclaration(classNode)!;
        const identifierOfDirective =
            (((classDecorators[0].node as ts.ObjectLiteralExpression).properties[0] as
              ts.PropertyAssignment)
                 .initializer as ts.PropertyAccessExpression)
                .expression as ts.Identifier;

        const expectedDeclarationNode =
            getSourceFileOrError(bundle.program, _('/node_modules/@angular/core/index.d.ts'));
        const actualDeclaration = host.getDeclarationOfIdentifier(identifierOfDirective);
        expect(actualDeclaration).not.toBe(null);
        expect(actualDeclaration!.node).toBe(expectedDeclarationNode);
        expect(actualDeclaration!.viaModule).toBe('@angular/core');
      });

      it('should recognize TypeScript helpers (as function declarations)', () => {
        const file: TestFile = {
          name: _('/test.js'),
          contents: `
            (function (global, factory) {
              typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
              typeof define === 'function' && define.amd ? define('test', ['exports'], factory) :
              (factory(global.test));
            }(this, (function (exports) { 'use strict';
              function __assign(t, ...sources) { /* ... */ }
              function __spread(...args) { /* ... */ }
              function __spreadArrays(...args) { /* ... */ }

              var a = __assign({foo: 'bar'}, {baz: 'qux'});
              var b = __spread(['foo', 'bar'], ['baz', 'qux']);
              var c = __spreadArrays(['foo', 'bar'], ['baz', 'qux']);
            })));
          `,
        };
        loadTestFiles([file]);
        const bundle = makeTestBundleProgram(file.name);
        const host = createHost(bundle, new UmdReflectionHost(new MockLogger(), false, bundle));
        const {factoryFn} = parseStatementForUmdModule(
            getSourceFileOrError(bundle.program, file.name).statements[0])!;

        const testForHelper = createTestForTsHelper(host, factoryFn, getFunctionDeclaration);

        testForHelper('a', '__assign', KnownDeclaration.TsHelperAssign);
        testForHelper('b', '__spread', KnownDeclaration.TsHelperSpread);
        testForHelper('c', '__spreadArrays', KnownDeclaration.TsHelperSpreadArrays);
      });

      it('should recognize suffixed TypeScript helpers (as function declarations)', () => {
        const file: TestFile = {
          name: _('/test.js'),
          contents: `
            (function (global, factory) {
              typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
              typeof define === 'function' && define.amd ? define('test', ['exports'], factory) :
              (factory(global.test));
            }(this, (function (exports) { 'use strict';
              function __assign$1(t, ...sources) { /* ... */ }
              function __spread$2(...args) { /* ... */ }
              function __spreadArrays$3(...args) { /* ... */ }

              var a = __assign$1({foo: 'bar'}, {baz: 'qux'});
              var b = __spread$2(['foo', 'bar'], ['baz', 'qux']);
              var c = __spreadArrays$3(['foo', 'bar'], ['baz', 'qux']);
            })));
          `,
        };
        loadTestFiles([file]);
        const bundle = makeTestBundleProgram(file.name);
        const host = createHost(bundle, new UmdReflectionHost(new MockLogger(), false, bundle));
        const {factoryFn} = parseStatementForUmdModule(
            getSourceFileOrError(bundle.program, file.name).statements[0])!;

        const testForHelper = createTestForTsHelper(host, factoryFn, getFunctionDeclaration);

        testForHelper('a', '__assign$1', KnownDeclaration.TsHelperAssign);
        testForHelper('b', '__spread$2', KnownDeclaration.TsHelperSpread);
        testForHelper('c', '__spreadArrays$3', KnownDeclaration.TsHelperSpreadArrays);
      });

      it('should recognize TypeScript helpers (as variable declarations)', () => {
        const file: TestFile = {
          name: _('/test.js'),
          contents: `
            (function (global, factory) {
              typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
              typeof define === 'function' && define.amd ? define('test', ['exports'], factory) :
              (factory(global.test));
            }(this, (function (exports) { 'use strict';
              var __assign = (this && this.__assign) || function (t, ...sources) { /* ... */ }
              var __spread = (this && this.__spread) || function (...args) { /* ... */ }
              var __spreadArrays = (this && this.__spreadArrays) || function (...args) { /* ... */ }

              var a = __assign({foo: 'bar'}, {baz: 'qux'});
              var b = __spread(['foo', 'bar'], ['baz', 'qux']);
              var c = __spreadArrays(['foo', 'bar'], ['baz', 'qux']);
            })));
          `,
        };
        loadTestFiles([file]);
        const bundle = makeTestBundleProgram(file.name);
        const host = createHost(bundle, new UmdReflectionHost(new MockLogger(), false, bundle));
        const {factoryFn} = parseStatementForUmdModule(
            getSourceFileOrError(bundle.program, file.name).statements[0])!;

        const testForHelper = createTestForTsHelper(host, factoryFn, getVariableDeclaration);

        testForHelper('a', '__assign', KnownDeclaration.TsHelperAssign);
        testForHelper('b', '__spread', KnownDeclaration.TsHelperSpread);
        testForHelper('c', '__spreadArrays', KnownDeclaration.TsHelperSpreadArrays);
      });

      it('should recognize suffixed TypeScript helpers (as variable declarations)', () => {
        const file: TestFile = {
          name: _('/test.js'),
          contents: `
            (function (global, factory) {
              typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
              typeof define === 'function' && define.amd ? define('test', ['exports'], factory) :
              (factory(global.test));
            }(this, (function (exports) { 'use strict';
              var __assign$1 = (this && this.__assign$1) || function (t, ...sources) { /* ... */ }
              var __spread$2 = (this && this.__spread$2) || function (...args) { /* ... */ }
              var __spreadArrays$3 = (this && this.__spreadArrays$3) || function (...args) { /* ... */ }

              var a = __assign$1({foo: 'bar'}, {baz: 'qux'});
              var b = __spread$2(['foo', 'bar'], ['baz', 'qux']);
              var c = __spreadArrays$3(['foo', 'bar'], ['baz', 'qux']);
            })));
          `,
        };
        loadTestFiles([file]);
        const bundle = makeTestBundleProgram(file.name);
        const host = createHost(bundle, new UmdReflectionHost(new MockLogger(), false, bundle));
        const {factoryFn} = parseStatementForUmdModule(
            getSourceFileOrError(bundle.program, file.name).statements[0])!;

        const testForHelper = createTestForTsHelper(host, factoryFn, getVariableDeclaration);

        testForHelper('a', '__assign$1', KnownDeclaration.TsHelperAssign);
        testForHelper('b', '__spread$2', KnownDeclaration.TsHelperSpread);
        testForHelper('c', '__spreadArrays$3', KnownDeclaration.TsHelperSpreadArrays);
      });

      it('should recognize imported TypeScript helpers', () => {
        const files: TestFile[] = [
          {
            name: _('/test.js'),
            contents: `
              (function (global, factory) {
                typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports, require('tslib')) :
                typeof define === 'function' && define.amd ? define('test', ['exports', 'tslib'], factory) :
                (factory(global.test, global.tslib));
              }(this, (function (exports, tslib_1) { 'use strict';
                var a = tslib_1.__assign({foo: 'bar'}, {baz: 'qux'});
                var b = tslib_1.__spread(['foo', 'bar'], ['baz', 'qux']);
                var c = tslib_1.__spreadArrays(['foo', 'bar'], ['baz', 'qux']);
              })));
            `,
          },
          {
            name: _('/node_modules/tslib/index.d.ts'),
            contents: `
              export declare function __assign(t: any, ...sources: any[]): any;
              export declare function __spread(...args: any[][]): any[];
              export declare function __spreadArrays(...args: any[][]): any[];
            `,
          },
        ];
        loadTestFiles(files);

        const [testFile, tslibFile] = files;
        const bundle = makeTestBundleProgram(testFile.name);
        const host = createHost(bundle, new UmdReflectionHost(new MockLogger(), false, bundle));
        const {factoryFn} = parseStatementForUmdModule(
            getSourceFileOrError(bundle.program, testFile.name).statements[0])!;
        const testForHelper = createTestForTsHelper(
            host, factoryFn,
            (_fn, helperName) => getDeclaration(
                bundle.program, tslibFile.name, helperName, ts.isFunctionDeclaration));

        testForHelper('a', '__assign', KnownDeclaration.TsHelperAssign, 'tslib');
        testForHelper('b', '__spread', KnownDeclaration.TsHelperSpread, 'tslib');
        testForHelper('c', '__spreadArrays', KnownDeclaration.TsHelperSpreadArrays, 'tslib');
      });

      it('should recognize undeclared, unimported TypeScript helpers (by name)', () => {
        const file: TestFile = {
          name: _('/test.js'),
          contents: `
            (function (global, factory) {
              typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
              typeof define === 'function' && define.amd ? define('test', ['exports'], factory) :
              (factory(global.test));
            }(this, (function (exports) { 'use strict';
              var a = __assign({foo: 'bar'}, {baz: 'qux'});
              var b = __spread(['foo', 'bar'], ['baz', 'qux']);
              var c = __spreadArrays(['foo', 'bar'], ['baz', 'qux']);
            })));
          `,
        };
        loadTestFiles([file]);
        const bundle = makeTestBundleProgram(file.name);
        const host = createHost(bundle, new UmdReflectionHost(new MockLogger(), false, bundle));
        const {factoryFn} = parseStatementForUmdModule(
            getSourceFileOrError(bundle.program, file.name).statements[0])!;

        const testForHelper = (varName: string, helperName: string, knownAs: KnownDeclaration) => {
          const node = getVariableDeclaration(factoryFn, varName);
          const helperIdentifier = getIdentifierFromCallExpression(node);
          const helperDeclaration = host.getDeclarationOfIdentifier(helperIdentifier);

          expect(helperDeclaration).toEqual({
            known: knownAs,
            expression: helperIdentifier,
            node: null,
            viaModule: null,
          });
        };

        testForHelper('a', '__assign', KnownDeclaration.TsHelperAssign);
        testForHelper('b', '__spread', KnownDeclaration.TsHelperSpread);
        testForHelper('c', '__spreadArrays', KnownDeclaration.TsHelperSpreadArrays);
      });

      it('should recognize suffixed, undeclared, unimported TypeScript helpers (by name)', () => {
        const file: TestFile = {
          name: _('/test.js'),
          contents: `
            (function (global, factory) {
              typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
              typeof define === 'function' && define.amd ? define('test', ['exports'], factory) :
              (factory(global.test));
            }(this, (function (exports) { 'use strict';
              var a = __assign$1({foo: 'bar'}, {baz: 'qux'});
              var b = __spread$2(['foo', 'bar'], ['baz', 'qux']);
              var c = __spreadArrays$3(['foo', 'bar'], ['baz', 'qux']);
            })));
          `,
        };
        loadTestFiles([file]);
        const bundle = makeTestBundleProgram(file.name);
        const host = createHost(bundle, new UmdReflectionHost(new MockLogger(), false, bundle));
        const {factoryFn} = parseStatementForUmdModule(
            getSourceFileOrError(bundle.program, file.name).statements[0])!;

        const testForHelper = (varName: string, helperName: string, knownAs: KnownDeclaration) => {
          const node = getVariableDeclaration(factoryFn, varName);
          const helperIdentifier = getIdentifierFromCallExpression(node);
          const helperDeclaration = host.getDeclarationOfIdentifier(helperIdentifier);

          expect(helperDeclaration).toEqual({
            known: knownAs,
            expression: helperIdentifier,
            node: null,
            viaModule: null,
          });
        };

        testForHelper('a', '__assign$1', KnownDeclaration.TsHelperAssign);
        testForHelper('b', '__spread$2', KnownDeclaration.TsHelperSpread);
        testForHelper('c', '__spreadArrays$3', KnownDeclaration.TsHelperSpreadArrays);
      });

      it('should recognize enum declarations with string values', () => {
        const testFile: TestFile = {
          name: _('/node_modules/test-package/some/file.js'),
          contents: `
          (function (global, factory) {
            typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports, require('@angular/core')) :
            typeof define === 'function' && define.amd ? define('some_directive', ['exports', '@angular/core'], factory) :
            (factory(global.some_directive,global.ng.core));
          }(this, (function (exports,core) { 'use strict';
            var Enum;
            (function (Enum) {
              Enum["ValueA"] = "1";
              Enum["ValueB"] = "2";
            })(exports.Enum || (exports.Enum = {}));

            var value = Enum;
          })));
          `
        };
        loadTestFiles([testFile]);
        const bundle = makeTestBundleProgram(testFile.name);
        const host = createHost(bundle, new UmdReflectionHost(new MockLogger(), false, bundle));
        const {factoryFn} = parseStatementForUmdModule(
            getSourceFileOrError(bundle.program, _('/node_modules/test-package/some/file.js'))
                .statements[0])!;
        const valueDecl = getVariableDeclaration(factoryFn, 'value');
        const declaration = host.getDeclarationOfIdentifier(
                                valueDecl.initializer as ts.Identifier) as ConcreteDeclaration;

        const enumMembers = (declaration.identity as DownleveledEnum).enumMembers;
        expect(declaration.node.parent.parent.getText()).toBe('var Enum;');
        expect(enumMembers!.length).toBe(2);
        expect(enumMembers![0].name.getText()).toBe('"ValueA"');
        expect(enumMembers![0].initializer!.getText()).toBe('"1"');
        expect(enumMembers![1].name.getText()).toBe('"ValueB"');
        expect(enumMembers![1].initializer!.getText()).toBe('"2"');
      });

      it('should recognize enum declarations with numeric values', () => {
        const testFile: TestFile = {
          name: _('/node_modules/test-package/some/file.js'),
          contents: `
          (function (global, factory) {
            typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports, require('@angular/core')) :
            typeof define === 'function' && define.amd ? define('some_directive', ['exports', '@angular/core'], factory) :
            (factory(global.some_directive,global.ng.core));
          }(this, (function (exports,core) { 'use strict';
            var Enum;
            (function (Enum) {
              Enum[Enum["ValueA"] = "1"] = "ValueA";
              Enum[Enum["ValueB"] = "2"] = "ValueB";
            })(exports.Enum || (exports.Enum = {}));

            var value = Enum;
          })));
          `
        };
        loadTestFiles([testFile]);
        const bundle = makeTestBundleProgram(testFile.name);
        const host = createHost(bundle, new UmdReflectionHost(new MockLogger(), false, bundle));
        const {factoryFn} = parseStatementForUmdModule(
            getSourceFileOrError(bundle.program, _('/node_modules/test-package/some/file.js'))
                .statements[0])!;
        const valueDecl = getVariableDeclaration(factoryFn, 'value');
        const declaration = host.getDeclarationOfIdentifier(
                                valueDecl.initializer as ts.Identifier) as ConcreteDeclaration;

        const enumMembers = (declaration.identity as DownleveledEnum).enumMembers;
        expect(declaration.node.parent.parent.getText()).toBe('var Enum;');
        expect(enumMembers!.length).toBe(2);
        expect(enumMembers![0].name.getText()).toBe('"ValueA"');
        expect(enumMembers![0].initializer!.getText()).toBe('"1"');
        expect(enumMembers![1].name.getText()).toBe('"ValueB"');
        expect(enumMembers![1].initializer!.getText()).toBe('"2"');
      });

      it('should not consider IIFEs that do no assign members to the parameter as an enum declaration',
         () => {
           const testFile: TestFile = {
             name: _('/node_modules/test-package/some/file.js'),
             contents: `
          (function (global, factory) {
            typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports, require('@angular/core')) :
            typeof define === 'function' && define.amd ? define('some_directive', ['exports', '@angular/core'], factory) :
            (factory(global.some_directive,global.ng.core));
          }(this, (function (exports,core) { 'use strict';
            var Enum;
            (function (E) {
              Enum["ValueA"] = "1"];
              Enum["ValueB"] = "2"];
            })(exports.Enum || (exports.Enum = {}));

            var value = Enum;
          })));
          `
           };
           loadTestFiles([testFile]);
           const bundle = makeTestBundleProgram(testFile.name);
           const host = createHost(bundle, new UmdReflectionHost(new MockLogger(), false, bundle));
           const valueDecl = getDeclaration(
               bundle.program, _('/node_modules/test-package/some/file.js'), 'value',
               ts.isVariableDeclaration);
           const declaration = host.getDeclarationOfIdentifier(
                                   valueDecl.initializer as ts.Identifier) as ConcreteDeclaration;

           expect(declaration.node.parent.parent.getText()).toBe('var Enum;');
           expect(declaration.identity).toBe(null);
         });

      it('should not consider IIFEs without call argument as an enum declaration', () => {
        const testFile: TestFile = {
          name: _('/node_modules/test-package/some/file.js'),
          contents: `
          (function (global, factory) {
            typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports, require('@angular/core')) :
            typeof define === 'function' && define.amd ? define('some_directive', ['exports', '@angular/core'], factory) :
            (factory(global.some_directive,global.ng.core));
          }(this, (function (exports,core) { 'use strict';
            var Enum;
            (function (Enum) {
              Enum["ValueA"] = "1"];
              Enum["ValueB"] = "2"];
            })();

            var value = Enum;
          })));
          `
        };
        loadTestFiles([testFile]);
        const bundle = makeTestBundleProgram(testFile.name);
        const host = createHost(bundle, new UmdReflectionHost(new MockLogger(), false, bundle));
        const valueDecl = getDeclaration(
            bundle.program, _('/node_modules/test-package/some/file.js'), 'value',
            ts.isVariableDeclaration);
        const declaration = host.getDeclarationOfIdentifier(
                                valueDecl.initializer as ts.Identifier) as ConcreteDeclaration;

        expect(declaration.node.parent.parent.getText()).toBe('var Enum;');
        expect(declaration.identity).toBe(null);
      });
    });

    describe('getExportsOfModule()', () => {
      it('should return a map of all the exports from a given module', () => {
        loadFakeCore(getFileSystem());
        loadTestFiles(EXPORTS_FILES);
        const bundle = makeTestBundleProgram(_('/index.js'));
        const host = createHost(bundle, new UmdReflectionHost(new MockLogger(), false, bundle));
        const file = getSourceFileOrError(bundle.program, _('/b_module.js'));
        const exportDeclarations = host.getExportsOfModule(file);
        expect(exportDeclarations).not.toBe(null);
        expect(Array.from(exportDeclarations!.entries())
                   .map(entry => [entry[0], entry[1].node!.getText(), entry[1].viaModule]))
            .toEqual([
              ['Directive', `Directive: FnWithArg<(clazz: any) => any>`, '@angular/core'],
              ['a', `a = 'a'`, null],
              ['b', `b = a_module.a`, null],
              ['c', `a = 'a'`, null],
              ['d', `b = a_module.a`, null],
              ['e', `e = 'e'`, null],
              ['DirectiveX', `Directive: FnWithArg<(clazz: any) => any>`, '@angular/core'],
              [
                'SomeClass', `SomeClass = (function() {
    function SomeClass() {}
    return SomeClass;
  }())`,
                null
              ],
            ]);
      });

      it('should handle wildcard re-exports of other modules (with emitted helpers)', () => {
        loadFakeCore(getFileSystem());
        loadTestFiles(EXPORTS_FILES);
        const bundle = makeTestBundleProgram(_('/index.js'));
        const host = createHost(bundle, new UmdReflectionHost(new MockLogger(), false, bundle));
        const file = getSourceFileOrError(bundle.program, _('/wildcard_reexports.js'));
        const exportDeclarations = host.getExportsOfModule(file);
        expect(exportDeclarations).not.toBe(null);
        expect(Array.from(exportDeclarations!.entries())
                   .map(entry => [entry[0], entry[1].node!.getText(), entry[1].viaModule]))
            .toEqual([
              ['Directive', `Directive: FnWithArg<(clazz: any) => any>`, _('/b_module')],
              ['a', `a = 'a'`, _('/b_module')],
              ['b', `b = a_module.a`, _('/b_module')],
              ['c', `a = 'a'`, _('/b_module')],
              ['d', `b = a_module.a`, _('/b_module')],
              ['e', `e = 'e'`, _('/b_module')],
              ['DirectiveX', `Directive: FnWithArg<(clazz: any) => any>`, _('/b_module')],
              [
                'SomeClass',
                `SomeClass = (function() {\n    function SomeClass() {}\n    return SomeClass;\n  }())`,
                _('/b_module')
              ],
              ['xtra1', `xtra1 = 'xtra1'`, _('/xtra_module')],
              ['xtra2', `xtra2 = 'xtra2'`, _('/xtra_module')],
            ]);
      });

      it('should handle wildcard re-exports of other modules (with imported helpers)', () => {
        loadFakeCore(getFileSystem());
        loadTestFiles(EXPORTS_FILES);
        const bundle = makeTestBundleProgram(_('/index.js'));
        const host = createHost(bundle, new UmdReflectionHost(new MockLogger(), false, bundle));
        const file =
            getSourceFileOrError(bundle.program, _('/wildcard_reexports_imported_helpers.js'));
        const exportDeclarations = host.getExportsOfModule(file);
        expect(exportDeclarations).not.toBe(null);
        expect(Array.from(exportDeclarations!.entries())
                   .map(entry => [entry[0], entry[1].node!.getText(), entry[1].viaModule]))
            .toEqual([
              ['Directive', `Directive: FnWithArg<(clazz: any) => any>`, _('/b_module')],
              ['a', `a = 'a'`, _('/b_module')],
              ['b', `b = a_module.a`, _('/b_module')],
              ['c', `a = 'a'`, _('/b_module')],
              ['d', `b = a_module.a`, _('/b_module')],
              ['e', `e = 'e'`, _('/b_module')],
              ['DirectiveX', `Directive: FnWithArg<(clazz: any) => any>`, _('/b_module')],
              [
                'SomeClass',
                `SomeClass = (function() {\n    function SomeClass() {}\n    return SomeClass;\n  }())`,
                _('/b_module')
              ],
              ['xtra1', `xtra1 = 'xtra1'`, _('/xtra_module')],
              ['xtra2', `xtra2 = 'xtra2'`, _('/xtra_module')],
            ]);
      });

      it('should handle inline exports', () => {
        loadFakeCore(getFileSystem());
        loadTestFiles([INLINE_EXPORT_FILE]);
        const bundle = makeTestBundleProgram(INLINE_EXPORT_FILE.name);
        const host = createHost(bundle, new UmdReflectionHost(new MockLogger(), false, bundle));
        const file = getSourceFileOrError(bundle.program, INLINE_EXPORT_FILE.name);
        const exportDeclarations = host.getExportsOfModule(file);
        expect(exportDeclarations).not.toBe(null);
        const decl = exportDeclarations!.get('directives') as InlineDeclaration;
        expect(decl).not.toBeUndefined();
        expect(decl.node).toBeNull();
        expect(decl.expression).toBeDefined();
      });

      it('should recognize declarations of known TypeScript helpers', () => {
        const tslib = {
          name: _('/tslib.d.ts'),
          contents: `
            export declare function __assign(t: any, ...sources: any[]): any;
            export declare function __spread(...args: any[][]): any[];
            export declare function __spreadArrays(...args: any[][]): any[];
            export declare function __unknownHelper(...args: any[]): any;
          `,
        };
        loadTestFiles([tslib]);
        const bundle = makeTestBundleProgram(tslib.name);
        const host = createHost(bundle, new UmdReflectionHost(new MockLogger(), false, bundle));
        const sf = getSourceFileOrError(bundle.program, tslib.name);
        const exportDeclarations = host.getExportsOfModule(sf)!;

        expect([...exportDeclarations].map(([exportName, {known}]) => [exportName, known]))
            .toEqual([
              ['__assign', KnownDeclaration.TsHelperAssign],
              ['__spread', KnownDeclaration.TsHelperSpread],
              ['__spreadArrays', KnownDeclaration.TsHelperSpreadArrays],
              ['__unknownHelper', null],
            ]);
      });

      it('should define property exports from a module', () => {
        loadFakeCore(getFileSystem());
        loadTestFiles(EXPORTS_FILES);
        const bundle = makeTestBundleProgram(_('/index.js'));
        const host = createHost(bundle, new UmdReflectionHost(new MockLogger(), false, bundle));
        const file = getSourceFileOrError(bundle.program, _('/define_property_reexports.js'));
        const exportDeclarations = host.getExportsOfModule(file);
        expect(exportDeclarations).not.toBe(null);
        expect(Array.from(exportDeclarations!.entries())
                   .map(entry => [entry[0], entry[1].node!.getText(), entry[1].viaModule]))
            .toEqual([
              ['newA', `a = 'a'`, null],
            ]);
      });
    });

    describe('getClassSymbol()', () => {
      it('should return the class symbol for an ES2015 class', () => {
        loadTestFiles([SIMPLE_ES2015_CLASS_FILE]);
        const bundle = makeTestBundleProgram(SIMPLE_ES2015_CLASS_FILE.name);
        const host = createHost(bundle, new UmdReflectionHost(new MockLogger(), false, bundle));
        const node = getDeclaration(
            bundle.program, SIMPLE_ES2015_CLASS_FILE.name, 'EmptyClass', isNamedClassDeclaration);
        const classSymbol = host.getClassSymbol(node);

        expect(classSymbol).toBeDefined();
        expect(classSymbol!.declaration.valueDeclaration).toBe(node);
        expect(classSymbol!.implementation.valueDeclaration).toBe(node);
      });

      it('should handle wildcard re-exports of other modules (with emitted helpers)', () => {
        loadFakeCore(getFileSystem());
        loadTestFiles(EXPORTS_FILES);
        const bundle = makeTestBundleProgram(_('/index.js'));
        const host = createHost(bundle, new UmdReflectionHost(new MockLogger(), false, bundle));
        const file = getSourceFileOrError(bundle.program, _('/wildcard_reexports.js'));
        const exportDeclarations = host.getExportsOfModule(file);
        expect(exportDeclarations).not.toBe(null);
        expect(Array.from(exportDeclarations!.entries())
                   .map(entry => [entry[0], entry[1].node!.getText(), entry[1].viaModule]))
            .toEqual([
              ['Directive', `Directive: FnWithArg<(clazz: any) => any>`, _('/b_module')],
              ['a', `a = 'a'`, _('/b_module')],
              ['b', `b = a_module.a`, _('/b_module')],
              ['c', `a = 'a'`, _('/b_module')],
              ['d', `b = a_module.a`, _('/b_module')],
              ['e', `e = 'e'`, _('/b_module')],
              ['DirectiveX', `Directive: FnWithArg<(clazz: any) => any>`, _('/b_module')],
              [
                'SomeClass',
                `SomeClass = (function() {\n    function SomeClass() {}\n    return SomeClass;\n  }())`,
                _('/b_module')
              ],
              ['xtra1', `xtra1 = 'xtra1'`, _('/xtra_module')],
              ['xtra2', `xtra2 = 'xtra2'`, _('/xtra_module')],
            ]);
      });

      it('should handle wildcard re-exports of other modules (with imported helpers)', () => {
        loadFakeCore(getFileSystem());
        loadTestFiles(EXPORTS_FILES);
        const bundle = makeTestBundleProgram(_('/index.js'));
        const host = createHost(bundle, new UmdReflectionHost(new MockLogger(), false, bundle));
        const file =
            getSourceFileOrError(bundle.program, _('/wildcard_reexports_imported_helpers.js'));
        const exportDeclarations = host.getExportsOfModule(file);
        expect(exportDeclarations).not.toBe(null);
        expect(Array.from(exportDeclarations!.entries())
                   .map(entry => [entry[0], entry[1].node!.getText(), entry[1].viaModule]))
            .toEqual([
              ['Directive', `Directive: FnWithArg<(clazz: any) => any>`, _('/b_module')],
              ['a', `a = 'a'`, _('/b_module')],
              ['b', `b = a_module.a`, _('/b_module')],
              ['c', `a = 'a'`, _('/b_module')],
              ['d', `b = a_module.a`, _('/b_module')],
              ['e', `e = 'e'`, _('/b_module')],
              ['DirectiveX', `Directive: FnWithArg<(clazz: any) => any>`, _('/b_module')],
              [
                'SomeClass',
                `SomeClass = (function() {\n    function SomeClass() {}\n    return SomeClass;\n  }())`,
                _('/b_module')
              ],
              ['xtra1', `xtra1 = 'xtra1'`, _('/xtra_module')],
              ['xtra2', `xtra2 = 'xtra2'`, _('/xtra_module')],
            ]);
      });

      it('should handle wildcard re-exports of other modules using `require()` calls', () => {
        loadFakeCore(getFileSystem());
        loadTestFiles(EXPORTS_FILES);
        const bundle = makeTestBundleProgram(_('/index.js'));
        const host = createHost(bundle, new UmdReflectionHost(new MockLogger(), false, bundle));
        const file = getSourceFileOrError(bundle.program, _('/wildcard_reexports_with_require.js'));
        const exportDeclarations = host.getExportsOfModule(file);
        expect(exportDeclarations).not.toBe(null);
        expect(Array.from(exportDeclarations!.entries())
                   .map(entry => [entry[0], entry[1].node!.getText(), entry[1].viaModule]))
            .toEqual([
              ['Directive', `Directive: FnWithArg<(clazz: any) => any>`, _('/b_module')],
              ['a', `a = 'a'`, _('/b_module')],
              ['b', `b = a_module.a`, _('/b_module')],
              ['c', `a = 'a'`, _('/b_module')],
              ['d', `b = a_module.a`, _('/b_module')],
              ['e', `e = 'e'`, _('/b_module')],
              ['DirectiveX', `Directive: FnWithArg<(clazz: any) => any>`, _('/b_module')],
              [
                'SomeClass',
                `SomeClass = (function() {\n    function SomeClass() {}\n    return SomeClass;\n  }())`,
                _('/b_module')
              ],
              ['xtra1', `xtra1 = 'xtra1'`, _('/xtra_module')],
              ['xtra2', `xtra2 = 'xtra2'`, _('/xtra_module')],
            ]);
      });

      it('should return the class symbol for an ES5 class (outer variable declaration)', () => {
        loadTestFiles([SIMPLE_CLASS_FILE]);
        const bundle = makeTestBundleProgram(SIMPLE_CLASS_FILE.name);
        const host = createHost(bundle, new UmdReflectionHost(new MockLogger(), false, bundle));
        const outerNode = getDeclaration(
            bundle.program, SIMPLE_CLASS_FILE.name, 'EmptyClass', isNamedVariableDeclaration);
        const innerNode = (getIifeBody(outerNode.initializer!) as ts.Block)
                              .statements.find(isNamedFunctionDeclaration)!;
        const classSymbol = host.getClassSymbol(outerNode);

        expect(classSymbol).toBeDefined();
        expect(classSymbol!.declaration.valueDeclaration).toBe(outerNode);
        expect(classSymbol!.implementation.valueDeclaration).toBe(innerNode);
      });

      it('should return the class symbol for an ES5 class (inner function declaration)', () => {
        loadTestFiles([SIMPLE_CLASS_FILE]);
        const bundle = makeTestBundleProgram(SIMPLE_CLASS_FILE.name);
        const host = createHost(bundle, new UmdReflectionHost(new MockLogger(), false, bundle));
        const outerNode = getDeclaration(
            bundle.program, SIMPLE_CLASS_FILE.name, 'EmptyClass', isNamedVariableDeclaration);
        const innerNode = (getIifeBody(outerNode.initializer!) as ts.Block)
                              .statements.find(isNamedFunctionDeclaration)!;
        const classSymbol = host.getClassSymbol(innerNode);

        expect(classSymbol).toBeDefined();
        expect(classSymbol!.declaration.valueDeclaration).toBe(outerNode);
        expect(classSymbol!.implementation.valueDeclaration).toBe(innerNode);
      });

      it('should return the same class symbol (of the outer declaration) for outer and inner declarations',
         () => {
           loadTestFiles([SIMPLE_CLASS_FILE]);
           const bundle = makeTestBundleProgram(SIMPLE_CLASS_FILE.name);
           const host = createHost(bundle, new UmdReflectionHost(new MockLogger(), false, bundle));
           const outerNode = getDeclaration(
               bundle.program, SIMPLE_CLASS_FILE.name, 'EmptyClass', isNamedVariableDeclaration);
           const innerNode = (getIifeBody(outerNode.initializer!) as ts.Block)
                                 .statements.find(isNamedFunctionDeclaration)!;

           const innerSymbol = host.getClassSymbol(innerNode)!;
           const outerSymbol = host.getClassSymbol(outerNode)!;
           expect(innerSymbol.declaration).toBe(outerSymbol.declaration);
           expect(innerSymbol.implementation).toBe(outerSymbol.implementation);
         });

      it('should return the class symbol for an ES5 class whose IIFE is not wrapped in parens',
         () => {
           loadTestFiles([SIMPLE_CLASS_FILE]);
           const bundle = makeTestBundleProgram(SIMPLE_CLASS_FILE.name);
           const host = createHost(bundle, new UmdReflectionHost(new MockLogger(), false, bundle));
           const outerNode = getDeclaration(
               bundle.program, SIMPLE_CLASS_FILE.name, 'NoParensClass', isNamedVariableDeclaration);
           const innerNode = (getIifeBody(outerNode.initializer!) as ts.Block)
                                 .statements.find(isNamedFunctionDeclaration)!;
           const classSymbol = host.getClassSymbol(outerNode);

           expect(classSymbol).toBeDefined();
           expect(classSymbol!.declaration.valueDeclaration).toBe(outerNode);
           expect(classSymbol!.implementation.valueDeclaration).toBe(innerNode);
         });

      it('should return the class symbol for an ES5 class whose IIFE is not wrapped with inner parens',
         () => {
           loadTestFiles([SIMPLE_CLASS_FILE]);
           const bundle = makeTestBundleProgram(SIMPLE_CLASS_FILE.name);
           const host = createHost(bundle, new UmdReflectionHost(new MockLogger(), false, bundle));
           const outerNode = getDeclaration(
               bundle.program, SIMPLE_CLASS_FILE.name, 'InnerParensClass',
               isNamedVariableDeclaration);
           const innerNode = (getIifeBody(outerNode.initializer!) as ts.Block)
                                 .statements.find(isNamedFunctionDeclaration)!;
           const classSymbol = host.getClassSymbol(outerNode);

           expect(classSymbol).toBeDefined();
           expect(classSymbol!.declaration.valueDeclaration).toBe(outerNode);
           expect(classSymbol!.implementation.valueDeclaration).toBe(innerNode);
         });

      it('should return undefined if node is not an ES5 class', () => {
        loadTestFiles([FOO_FUNCTION_FILE]);
        const bundle = makeTestBundleProgram(FOO_FUNCTION_FILE.name);
        const host = createHost(bundle, new UmdReflectionHost(new MockLogger(), false, bundle));
        const node = getDeclaration(
            bundle.program, FOO_FUNCTION_FILE.name, 'foo', isNamedFunctionDeclaration);
        const classSymbol = host.getClassSymbol(node);

        expect(classSymbol).toBeUndefined();
      });

      it('should return undefined if variable declaration is not initialized using an IIFE', () => {
        const testFile = {
          name: _('/test.js'),
          contents: `var MyClass = null;`,
        };
        loadTestFiles([testFile]);
        const bundle = makeTestBundleProgram(testFile.name);
        const host = createHost(bundle, new UmdReflectionHost(new MockLogger(), false, bundle));
        const node =
            getDeclaration(bundle.program, testFile.name, 'MyClass', isNamedVariableDeclaration);
        const classSymbol = host.getClassSymbol(node);

        expect(classSymbol).toBeUndefined();
      });
    });

    describe('isClass()', () => {
      it('should return true if a given node is a TS class declaration', () => {
        loadTestFiles([SIMPLE_ES2015_CLASS_FILE]);
        const bundle = makeTestBundleProgram(SIMPLE_ES2015_CLASS_FILE.name);
        const host = createHost(bundle, new UmdReflectionHost(new MockLogger(), false, bundle));
        const node = getDeclaration(
            bundle.program, SIMPLE_ES2015_CLASS_FILE.name, 'EmptyClass', isNamedClassDeclaration);
        expect(host.isClass(node)).toBe(true);
      });

      it('should return true if a given node is the outer variable declaration of a class', () => {
        loadTestFiles([SIMPLE_CLASS_FILE]);
        const bundle = makeTestBundleProgram(SIMPLE_CLASS_FILE.name);
        const host = createHost(bundle, new UmdReflectionHost(new MockLogger(), false, bundle));
        const node = getDeclaration(
            bundle.program, SIMPLE_CLASS_FILE.name, 'EmptyClass', ts.isVariableDeclaration);
        expect(host.isClass(node)).toBe(true);
      });

      it('should return true if a given node is the inner variable declaration of a class', () => {
        loadTestFiles([SIMPLE_CLASS_FILE]);
        const bundle = makeTestBundleProgram(SIMPLE_CLASS_FILE.name);
        const host = createHost(bundle, new UmdReflectionHost(new MockLogger(), false, bundle));
        const outerNode = getDeclaration(
            bundle.program, SIMPLE_CLASS_FILE.name, 'EmptyClass', ts.isVariableDeclaration);
        const innerNode = (getIifeBody(outerNode.initializer!) as ts.Block)
                              .statements.find(isNamedFunctionDeclaration)!;
        expect(host.isClass(innerNode)).toBe(true);
      });

      it('should return false if a given node is a function declaration', () => {
        loadTestFiles([FOO_FUNCTION_FILE]);
        const bundle = makeTestBundleProgram(FOO_FUNCTION_FILE.name);
        const host = createHost(bundle, new UmdReflectionHost(new MockLogger(), false, bundle));
        const node = getDeclaration(
            bundle.program, FOO_FUNCTION_FILE.name, 'foo', isNamedFunctionDeclaration);
        expect(host.isClass(node)).toBe(false);
      });
    });

    describe('hasBaseClass()', () => {
      function hasBaseClass(source: string) {
        const file = {
          name: _('/synthesized_constructors.js'),
          contents: source,
        };

        loadTestFiles([file]);
        const bundle = makeTestBundleProgram(file.name);
        const host = createHost(bundle, new UmdReflectionHost(new MockLogger(), false, bundle));
        const classNode =
            getDeclaration(bundle.program, file.name, 'TestClass', isNamedVariableDeclaration);
        return host.hasBaseClass(classNode);
      }

      it('should consider an IIFE with _super parameter as having a base class', () => {
        const result = hasBaseClass(`
      var TestClass = /** @class */ (function (_super) {
        __extends(TestClass, _super);
        function TestClass() {}
        return TestClass;
      }(null));`);
        expect(result).toBe(true);
      });

      it('should consider an IIFE with a unique name generated for the _super parameter as having a base class',
         () => {
           const result = hasBaseClass(`
      var TestClass = /** @class */ (function (_super_1) {
        __extends(TestClass, _super_1);
        function TestClass() {}
        return TestClass;
      }(null));`);
           expect(result).toBe(true);
         });

      it('should not consider an IIFE without parameter as having a base class', () => {
        const result = hasBaseClass(`
      var TestClass = /** @class */ (function () {
        __extends(TestClass, _super);
        function TestClass() {}
        return TestClass;
      }(null));`);
        expect(result).toBe(false);
      });
    });

    describe('getBaseClassExpression()', () => {
      function getBaseClassIdentifier(source: string): ts.Identifier|null {
        const file = {
          name: _('/synthesized_constructors.js'),
          contents: source,
        };

        loadTestFiles([file]);
        const bundle = makeTestBundleProgram(file.name);
        const host = createHost(bundle, new UmdReflectionHost(new MockLogger(), false, bundle));
        const classNode =
            getDeclaration(bundle.program, file.name, 'TestClass', isNamedVariableDeclaration);
        const expression = host.getBaseClassExpression(classNode);
        if (expression !== null && !ts.isIdentifier(expression)) {
          throw new Error(
              'Expected class to inherit via an identifier but got: ' + expression.getText());
        }
        return expression;
      }

      it('should find the base class of an IIFE with _super parameter', () => {
        const identifier = getBaseClassIdentifier(`
        var BaseClass = /** @class */ (function () {
          function BaseClass() {}
          return BaseClass;
        }());
        var TestClass = /** @class */ (function (_super) {
          __extends(TestClass, _super);
          function TestClass() {}
          return TestClass;
        }(BaseClass));`);
        expect(identifier!.text).toBe('BaseClass');
      });

      it('should find the base class of an IIFE with a unique name generated for the _super parameter',
         () => {
           const identifier = getBaseClassIdentifier(`
        var BaseClass = /** @class */ (function () {
          function BaseClass() {}
          return BaseClass;
        }());
        var TestClass = /** @class */ (function (_super_1) {
          __extends(TestClass, _super_1);
          function TestClass() {}
          return TestClass;
        }(BaseClass));`);
           expect(identifier!.text).toBe('BaseClass');
         });

      it('should not find a base class for an IIFE without parameter', () => {
        const identifier = getBaseClassIdentifier(`
        var BaseClass = /** @class */ (function () {
          function BaseClass() {}
          return BaseClass;
        }());
        var TestClass = /** @class */ (function () {
          __extends(TestClass, _super);
          function TestClass() {}
          return TestClass;
        }(BaseClass));`);
        expect(identifier).toBe(null);
      });

      it('should find a dynamic base class expression of an IIFE', () => {
        const file = {
          name: _('/synthesized_constructors.js'),
          contents: `
          var BaseClass = /** @class */ (function () {
            function BaseClass() {}
            return BaseClass;
          }());
          function foo() { return BaseClass; }
          var TestClass = /** @class */ (function (_super) {
            __extends(TestClass, _super);
            function TestClass() {}
            return TestClass;
          }(foo()));`,
        };

        loadTestFiles([file]);
        const bundle = makeTestBundleProgram(file.name);
        const host = createHost(bundle, new UmdReflectionHost(new MockLogger(), false, bundle));
        const classNode =
            getDeclaration(bundle.program, file.name, 'TestClass', isNamedVariableDeclaration);
        const expression = host.getBaseClassExpression(classNode)!;
        expect(expression.getText()).toBe('foo()');
      });
    });

    describe('findClassSymbols()', () => {
      it('should return an array of all classes in the given source file', () => {
        loadTestFiles(DECORATED_FILES);
        const bundle = makeTestBundleProgram(DECORATED_FILES[0].name);
        const host = createHost(bundle, new UmdReflectionHost(new MockLogger(), false, bundle));
        const primaryFile = getSourceFileOrError(bundle.program, DECORATED_FILES[0].name);
        const secondaryFile = getSourceFileOrError(bundle.program, DECORATED_FILES[1].name);

        const classSymbolsPrimary = host.findClassSymbols(primaryFile);
        expect(classSymbolsPrimary.length).toEqual(2);
        expect(classSymbolsPrimary.map(c => c.name)).toEqual(['A', 'B']);

        const classSymbolsSecondary = host.findClassSymbols(secondaryFile);
        expect(classSymbolsSecondary.length).toEqual(1);
        expect(classSymbolsSecondary.map(c => c.name)).toEqual(['D']);
      });
    });

    describe('getDecoratorsOfSymbol()', () => {
      it('should return decorators of class symbol', () => {
        loadTestFiles(DECORATED_FILES);
        const bundle = makeTestBundleProgram(DECORATED_FILES[0].name);
        const host = createHost(bundle, new UmdReflectionHost(new MockLogger(), false, bundle));
        const primaryFile = getSourceFileOrError(bundle.program, DECORATED_FILES[0].name);
        const secondaryFile = getSourceFileOrError(bundle.program, DECORATED_FILES[1].name);

        const classSymbolsPrimary = host.findClassSymbols(primaryFile);
        const classDecoratorsPrimary = classSymbolsPrimary.map(s => host.getDecoratorsOfSymbol(s));
        expect(classDecoratorsPrimary.length).toEqual(2);
        expect(classDecoratorsPrimary[0]!.map(d => d.name)).toEqual(['Directive']);
        expect(classDecoratorsPrimary[1]!.map(d => d.name)).toEqual(['Directive']);

        const classSymbolsSecondary = host.findClassSymbols(secondaryFile);
        const classDecoratorsSecondary =
            classSymbolsSecondary.map(s => host.getDecoratorsOfSymbol(s));
        expect(classDecoratorsSecondary.length).toEqual(1);
        expect(classDecoratorsSecondary[0]!.map(d => d.name)).toEqual(['Directive']);
      });
    });

    describe('getDtsDeclaration()', () => {
      it('should find the dts declaration that has the same relative path to the source file',
         () => {
           loadTestFiles(TYPINGS_SRC_FILES);
           loadTestFiles(TYPINGS_DTS_FILES);
           const bundle = makeTestBundleProgram(getRootFiles(TYPINGS_SRC_FILES)[0]);
           const dts = makeTestBundleProgram(getRootFiles(TYPINGS_DTS_FILES)[0]);
           const class1 = getDeclaration(
               bundle.program, _('/ep/src/class1.js'), 'Class1', ts.isVariableDeclaration);
           const host =
               createHost(bundle, new UmdReflectionHost(new MockLogger(), false, bundle, dts));

           const dtsDeclaration = host.getDtsDeclaration(class1);
           expect(dtsDeclaration!.getSourceFile().fileName).toEqual(_('/ep/typings/class1.d.ts'));
         });

      it('should find the dts declaration for exported functions', () => {
        loadTestFiles(TYPINGS_SRC_FILES);
        loadTestFiles(TYPINGS_DTS_FILES);
        const bundle = makeTestBundleProgram(_('/ep/src/func1.js'));
        const dts = makeTestBundleProgram(_('/ep/typings/func1.d.ts'));
        const mooFn = getDeclaration(
            bundle.program, _('/ep/src/func1.js'), 'mooFn', ts.isFunctionDeclaration);
        const host =
            createHost(bundle, new UmdReflectionHost(new MockLogger(), false, bundle, dts));

        const dtsDeclaration = host.getDtsDeclaration(mooFn);
        expect(dtsDeclaration!.getSourceFile().fileName).toEqual(_('/ep/typings/func1.d.ts'));
      });

      it('should return null if there is no matching class in the matching dts file', () => {
        loadTestFiles(TYPINGS_SRC_FILES);
        loadTestFiles(TYPINGS_DTS_FILES);
        const bundle = makeTestBundleProgram(getRootFiles(TYPINGS_SRC_FILES)[0]);
        const dts = makeTestBundleProgram(getRootFiles(TYPINGS_DTS_FILES)[0]);
        const missingClass = getDeclaration(
            bundle.program, _('/ep/src/class1.js'), 'MissingClass1', ts.isVariableDeclaration);
        const host =
            createHost(bundle, new UmdReflectionHost(new MockLogger(), false, bundle, dts));
        expect(host.getDtsDeclaration(missingClass)).toBe(null);
      });

      it('should return null if there is no matching dts file', () => {
        loadTestFiles(TYPINGS_SRC_FILES);
        loadTestFiles(TYPINGS_DTS_FILES);
        const bundle = makeTestBundleProgram(getRootFiles(TYPINGS_SRC_FILES)[0]);
        const dts = makeTestBundleProgram(getRootFiles(TYPINGS_DTS_FILES)[0]);
        const missingClass = getDeclaration(
            bundle.program, _('/ep/src/missing-class.js'), 'MissingClass2',
            ts.isVariableDeclaration);
        const host =
            createHost(bundle, new UmdReflectionHost(new MockLogger(), false, bundle, dts));

        expect(host.getDtsDeclaration(missingClass)).toBe(null);
      });

      it('should find the dts file that contains a matching class declaration, even if the source files do not match',
         () => {
           loadTestFiles(TYPINGS_SRC_FILES);
           loadTestFiles(TYPINGS_DTS_FILES);
           const bundle = makeTestBundleProgram(getRootFiles(TYPINGS_SRC_FILES)[0]);
           const dts = makeTestBundleProgram(getRootFiles(TYPINGS_DTS_FILES)[0]);
           const class1 = getDeclaration(
               bundle.program, _('/ep/src/flat-file.js'), 'Class1', ts.isVariableDeclaration);
           const host =
               createHost(bundle, new UmdReflectionHost(new MockLogger(), false, bundle, dts));

           const dtsDeclaration = host.getDtsDeclaration(class1);
           expect(dtsDeclaration!.getSourceFile().fileName).toEqual(_('/ep/typings/class1.d.ts'));
         });

      it('should find the dts file that contains a matching class declaration, even if the source files do not match',
         () => {
           loadTestFiles(TYPINGS_SRC_FILES);
           loadTestFiles(TYPINGS_DTS_FILES);
           const bundle = makeTestBundleProgram(_('/ep/src/flat-file.js'));
           const dts = makeTestBundleProgram(getRootFiles(TYPINGS_DTS_FILES)[0]);
           const class1 = getDeclaration(
               bundle.program, _('/ep/src/flat-file.js'), 'Class1', ts.isVariableDeclaration);
           const host =
               createHost(bundle, new UmdReflectionHost(new MockLogger(), false, bundle, dts));

           const dtsDeclaration = host.getDtsDeclaration(class1);
           expect(dtsDeclaration!.getSourceFile().fileName).toEqual(_('/ep/typings/class1.d.ts'));
         });

      it('should find aliased exports', () => {
        loadTestFiles(TYPINGS_SRC_FILES);
        loadTestFiles(TYPINGS_DTS_FILES);
        const bundle = makeTestBundleProgram(_('/ep/src/flat-file.js'));
        const dts = makeTestBundleProgram(getRootFiles(TYPINGS_DTS_FILES)[0]);
        const sourceClass = getDeclaration(
            bundle.program, _('/ep/src/flat-file.js'), 'SourceClass', ts.isVariableDeclaration);
        const host =
            createHost(bundle, new UmdReflectionHost(new MockLogger(), false, bundle, dts));

        const dtsDeclaration = host.getDtsDeclaration(sourceClass);
        if (dtsDeclaration === null) {
          return fail('Expected dts class to be found');
        }
        if (!isNamedClassDeclaration(dtsDeclaration)) {
          return fail('Expected a named class to be found.');
        }
        expect(dtsDeclaration.name.text).toEqual('TypingsClass');
        expect(_(dtsDeclaration.getSourceFile().fileName))
            .toEqual(_('/ep/typings/typings-class.d.ts'));
      });

      it('should match publicly and internal exported classes correctly, even if they have the same name',
         () => {
           loadTestFiles(TYPINGS_SRC_FILES);
           loadTestFiles(TYPINGS_DTS_FILES);
           const bundle = makeTestBundleProgram(getRootFiles(TYPINGS_SRC_FILES)[0]);
           const dts = makeTestBundleProgram(getRootFiles(TYPINGS_DTS_FILES)[0]);
           const host =
               createHost(bundle, new UmdReflectionHost(new MockLogger(), false, bundle, dts));

           const class2 = getDeclaration(
               bundle.program, _('/ep/src/class2.js'), 'Class2', isNamedVariableDeclaration);
           const class2DtsDeclaration = host.getDtsDeclaration(class2);
           expect(class2DtsDeclaration!.getSourceFile().fileName)
               .toEqual(_('/ep/typings/class2.d.ts'));

           const internalClass2 = getDeclaration(
               bundle.program, _('/ep/src/internal.js'), 'Class2', isNamedVariableDeclaration);
           const internalClass2DtsDeclaration = host.getDtsDeclaration(internalClass2);
           expect(internalClass2DtsDeclaration!.getSourceFile().fileName)
               .toEqual(_('/ep/typings/internal.d.ts'));
         });

      it('should prefer the publicly exported class if there are multiple classes with the same name',
         () => {
           loadTestFiles(TYPINGS_SRC_FILES);
           loadTestFiles(TYPINGS_DTS_FILES);
           const bundle = makeTestBundleProgram(_('/ep/src/index.js'));
           const dts = makeTestBundleProgram(_('/ep/typings/index.d.ts'));
           const class2 = getDeclaration(
               bundle.program, _('/ep/src/class2.js'), 'Class2', ts.isVariableDeclaration);
           const internalClass2 = getDeclaration(
               bundle.program, _('/ep/src/internal.js'), 'Class2', ts.isVariableDeclaration);
           const host =
               createHost(bundle, new UmdReflectionHost(new MockLogger(), false, bundle, dts));

           const class2DtsDeclaration = host.getDtsDeclaration(class2);
           expect(class2DtsDeclaration!.getSourceFile().fileName)
               .toEqual(_('/ep/typings/class2.d.ts'));

           const internalClass2DtsDeclaration = host.getDtsDeclaration(internalClass2);
           expect(internalClass2DtsDeclaration!.getSourceFile().fileName)
               .toEqual(_('/ep/typings/internal.d.ts'));
         });
    });

    describe('getInternalNameOfClass()', () => {
      it('should return the name of the inner class declaration', () => {
        loadTestFiles([SIMPLE_CLASS_FILE]);
        const bundle = makeTestBundleProgram(SIMPLE_CLASS_FILE.name);
        const host = createHost(bundle, new UmdReflectionHost(new MockLogger(), false, bundle));

        const emptyClass = getDeclaration(
            bundle.program, SIMPLE_CLASS_FILE.name, 'EmptyClass', isNamedVariableDeclaration);
        expect(host.getInternalNameOfClass(emptyClass).text).toEqual('EmptyClass');

        const class1 = getDeclaration(
            bundle.program, SIMPLE_CLASS_FILE.name, 'OuterClass1', isNamedVariableDeclaration);
        expect(host.getInternalNameOfClass(class1).text).toEqual('InnerClass1');

        const class2 = getDeclaration(
            bundle.program, SIMPLE_CLASS_FILE.name, 'OuterClass2', isNamedVariableDeclaration);
        expect(host.getInternalNameOfClass(class2).text).toEqual('InnerClass2');

        const childClass = getDeclaration(
            bundle.program, SIMPLE_CLASS_FILE.name, 'ChildClass', isNamedVariableDeclaration);
        expect(host.getInternalNameOfClass(childClass).text).toEqual('InnerChildClass');
      });
    });

    describe('getAdjacentNameOfClass()', () => {
      it('should return the name of the inner class declaration', () => {
        loadTestFiles([SIMPLE_CLASS_FILE]);
        const bundle = makeTestBundleProgram(SIMPLE_CLASS_FILE.name);
        const host = createHost(bundle, new UmdReflectionHost(new MockLogger(), false, bundle));

        const emptyClass = getDeclaration(
            bundle.program, SIMPLE_CLASS_FILE.name, 'EmptyClass', isNamedVariableDeclaration);
        expect(host.getAdjacentNameOfClass(emptyClass).text).toEqual('EmptyClass');

        const class1 = getDeclaration(
            bundle.program, SIMPLE_CLASS_FILE.name, 'OuterClass1', isNamedVariableDeclaration);
        expect(host.getAdjacentNameOfClass(class1).text).toEqual('InnerClass1');

        const class2 = getDeclaration(
            bundle.program, SIMPLE_CLASS_FILE.name, 'OuterClass2', isNamedVariableDeclaration);
        expect(host.getAdjacentNameOfClass(class2).text).toEqual('InnerClass2');

        const childClass = getDeclaration(
            bundle.program, SIMPLE_CLASS_FILE.name, 'ChildClass', isNamedVariableDeclaration);
        expect(host.getAdjacentNameOfClass(childClass).text).toEqual('InnerChildClass');
      });
    });
  });
});