/
util.ts
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/
util.ts
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/**
* @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 {BoundTarget, CssSelector, parseTemplate, ParseTemplateOptions, R3TargetBinder, SelectorMatcher} from '@angular/compiler';
import * as ts from 'typescript';
import {absoluteFrom, AbsoluteFsPath} from '../../file_system';
import {Reference} from '../../imports';
import {FieldPropertyMapping} from '../../metadata';
import {ClassDeclaration} from '../../reflection';
import {getDeclaration, makeProgram} from '../../testing';
import {ComponentMeta} from '../src/context';
/** Dummy file URL */
function getTestFilePath(): AbsoluteFsPath {
return absoluteFrom('/TEST_FILE.ts');
}
/**
* Creates a class declaration from a component source code.
*/
export function getComponentDeclaration(componentStr: string, className: string): ClassDeclaration {
const program = makeProgram([{name: getTestFilePath(), contents: componentStr}]);
return getDeclaration(
program.program, getTestFilePath(), className,
(value: ts.Declaration): value is ClassDeclaration => ts.isClassDeclaration(value));
}
/**
* Parses a template source code and returns a template-bound target, optionally with information
* about used components.
*
* @param template template to parse
* @param options extra template parsing options
* @param components components to bind to the template target
*/
export function getBoundTemplate(
template: string, options: ParseTemplateOptions = {},
components: Array<{selector: string, declaration: ClassDeclaration}> =
[]): BoundTarget<ComponentMeta> {
const matcher = new SelectorMatcher<ComponentMeta>();
components.forEach(({selector, declaration}) => {
matcher.addSelectables(CssSelector.parse(selector), {
ref: new Reference(declaration),
selector,
name: declaration.name.getText(),
isComponent: true,
inputs: FieldPropertyMapping.fromFieldMappedObject({}),
outputs: FieldPropertyMapping.fromFieldMappedObject({}),
exportAs: null,
});
});
const binder = new R3TargetBinder(matcher);
return binder.bind({template: parseTemplate(template, getTestFilePath(), options).nodes});
}