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semanticInfo.ts
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semanticInfo.ts
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import { readFileSync } from 'fs';
import glob from 'glob';
import { extname, join, resolve } from 'path';
import ts from 'typescript';
import { ParserOptions } from '../../src/parser-options';
import {
createSnapshotTestBlock,
formatSnapshotName,
parseCodeAndGenerateServices,
} from '../../tools/test-utils';
import { parseAndGenerateServices } from '../../src/parser';
import {
VariableDeclaration,
ClassDeclaration,
ClassProperty,
} from '../../src/ts-estree/ts-estree';
const FIXTURES_DIR = './tests/fixtures/semanticInfo';
const testFiles = glob.sync(`${FIXTURES_DIR}/**/*.src.ts`);
function createOptions(fileName: string): ParserOptions & { cwd?: string } {
return {
loc: true,
range: true,
tokens: true,
comment: true,
jsx: false,
useJSXTextNode: false,
errorOnUnknownASTType: true,
filePath: fileName,
tsconfigRootDir: join(process.cwd(), FIXTURES_DIR),
project: './tsconfig.json',
loggerFn: false,
};
}
describe('semanticInfo', () => {
// test all AST snapshots
testFiles.forEach(filename => {
const code = readFileSync(filename, 'utf8');
it(
formatSnapshotName(filename, FIXTURES_DIR, extname(filename)),
createSnapshotTestBlock(
code,
createOptions(filename),
/*generateServices*/ true,
),
);
});
it(`should cache the created ts.program`, () => {
const filename = testFiles[0];
const code = readFileSync(filename, 'utf8');
const options = createOptions(filename);
const optionsProjectString = {
...options,
project: './tsconfig.json',
};
expect(
parseAndGenerateServices(code, optionsProjectString).services.program,
).toBe(
parseAndGenerateServices(code, optionsProjectString).services.program,
);
});
it(`should handle "project": "./tsconfig.json" and "project": ["./tsconfig.json"] the same`, () => {
const filename = testFiles[0];
const code = readFileSync(filename, 'utf8');
const options = createOptions(filename);
const optionsProjectString = {
...options,
project: './tsconfig.json',
};
const optionsProjectArray = {
...options,
project: ['./tsconfig.json'],
};
expect(parseAndGenerateServices(code, optionsProjectString)).toEqual(
parseAndGenerateServices(code, optionsProjectArray),
);
});
it(`should resolve absolute and relative tsconfig paths the same`, () => {
const filename = testFiles[0];
const code = readFileSync(filename, 'utf8');
const options = createOptions(filename);
const optionsAbsolutePath = {
...options,
project: `${__dirname}/../fixtures/semanticInfo/tsconfig.json`,
};
const optionsRelativePath = {
...options,
project: `./tsconfig.json`,
};
const absolutePathResult = parseAndGenerateServices(
code,
optionsAbsolutePath,
);
const relativePathResult = parseAndGenerateServices(
code,
optionsRelativePath,
);
if (absolutePathResult.services.program === undefined) {
throw new Error('Unable to create ts.program for absolute tsconfig');
} else if (relativePathResult.services.program === undefined) {
throw new Error('Unable to create ts.program for relative tsconfig');
}
expect(
absolutePathResult.services.program.getResolvedProjectReferences(),
).toEqual(
relativePathResult.services.program.getResolvedProjectReferences(),
);
});
// case-specific tests
it('isolated-file tests', () => {
const fileName = resolve(FIXTURES_DIR, 'isolated-file.src.ts');
const parseResult = parseCodeAndGenerateServices(
readFileSync(fileName, 'utf8'),
createOptions(fileName),
);
testIsolatedFile(parseResult);
});
it('isolated-vue-file tests', () => {
const fileName = resolve(FIXTURES_DIR, 'extra-file-extension.vue');
const parseResult = parseCodeAndGenerateServices(
readFileSync(fileName, 'utf8'),
{
...createOptions(fileName),
extraFileExtensions: ['.vue'],
},
);
testIsolatedFile(parseResult);
});
it('non-existent-estree-nodes tests', () => {
const fileName = resolve(FIXTURES_DIR, 'non-existent-estree-nodes.src.ts');
const parseResult = parseCodeAndGenerateServices(
readFileSync(fileName, 'utf8'),
createOptions(fileName),
);
expect(parseResult).toHaveProperty('services.esTreeNodeToTSNodeMap');
const binaryExpression = (parseResult.ast.body[0] as VariableDeclaration)
.declarations[0].init!;
const tsBinaryExpression = parseResult.services.esTreeNodeToTSNodeMap!.get(
binaryExpression,
);
expect(tsBinaryExpression.kind).toEqual(ts.SyntaxKind.BinaryExpression);
const computedPropertyString = ((parseResult.ast
.body[1] as ClassDeclaration).body.body[0] as ClassProperty).key;
const tsComputedPropertyString = parseResult.services.esTreeNodeToTSNodeMap!.get(
computedPropertyString,
);
expect(tsComputedPropertyString.kind).toEqual(ts.SyntaxKind.StringLiteral);
});
it('imported-file tests', () => {
const fileName = resolve(FIXTURES_DIR, 'import-file.src.ts');
const parseResult = parseCodeAndGenerateServices(
readFileSync(fileName, 'utf8'),
createOptions(fileName),
);
// get type checker
expect(parseResult).toHaveProperty('services.program.getTypeChecker');
const checker = parseResult.services.program!.getTypeChecker();
// get array node (ast shape validated by snapshot)
// node is defined in other file than the parsed one
const arrayBoundName = (parseResult.ast as any).body[1].expression.callee
.object;
expect(arrayBoundName.name).toBe('arr');
expect(parseResult).toHaveProperty('services.esTreeNodeToTSNodeMap');
const tsArrayBoundName = parseResult.services.esTreeNodeToTSNodeMap!.get(
arrayBoundName,
);
expect(tsArrayBoundName).toBeDefined();
checkNumberArrayType(checker, tsArrayBoundName!);
expect(
parseResult.services.tsNodeToESTreeNodeMap!.get(tsArrayBoundName!),
).toBe(arrayBoundName);
});
it('non-existent file tests', () => {
const parseResult = parseCodeAndGenerateServices(
`const x = [parseInt("5")];`,
createOptions('<input>'),
);
// get type checker
expect(parseResult).toHaveProperty('services.program.getTypeChecker');
const checker = parseResult.services.program!.getTypeChecker();
// get bound name
const boundName = (parseResult.ast as any).body[0].declarations[0].id;
expect(boundName.name).toBe('x');
const tsBoundName = parseResult.services.esTreeNodeToTSNodeMap!.get(
boundName,
);
expect(tsBoundName).toBeDefined();
checkNumberArrayType(checker, tsBoundName!);
expect(parseResult.services.tsNodeToESTreeNodeMap!.get(tsBoundName!)).toBe(
boundName,
);
});
it('non-existent file should provide parents nodes', () => {
const parseResult = parseCodeAndGenerateServices(
`function M() { return Base }`,
createOptions('<input>'),
);
// https://github.com/JamesHenry/typescript-estree/issues/77
expect(parseResult.services.program).toBeDefined();
expect(
parseResult.services.program!.getSourceFile('<input>'),
).toBeDefined();
expect(
parseResult.services.program!.getSourceFile('<input>')!.statements[0]
.parent,
).toBeDefined();
});
it('non-existent project file', () => {
const fileName = resolve(FIXTURES_DIR, 'isolated-file.src.ts');
const badConfig = createOptions(fileName);
badConfig.project = './tsconfigs.json';
expect(() =>
parseCodeAndGenerateServices(readFileSync(fileName, 'utf8'), badConfig),
).toThrow(/The specified path does not exist: .+tsconfigs\.json'/);
});
it('fail to read project file', () => {
const fileName = resolve(FIXTURES_DIR, 'isolated-file.src.ts');
const badConfig = createOptions(fileName);
badConfig.project = '.';
expect(() =>
parseCodeAndGenerateServices(readFileSync(fileName, 'utf8'), badConfig),
).toThrow(/The specified path does not exist: .+semanticInfo'/);
});
it('malformed project file', () => {
const fileName = resolve(FIXTURES_DIR, 'isolated-file.src.ts');
const badConfig = createOptions(fileName);
badConfig.project = './badTSConfig/tsconfig.json';
expect(() =>
parseCodeAndGenerateServices(readFileSync(fileName, 'utf8'), badConfig),
).toThrowErrorMatchingSnapshot();
});
});
function testIsolatedFile(parseResult: any) {
// get type checker
expect(parseResult).toHaveProperty('services.program.getTypeChecker');
const checker = parseResult.services.program!.getTypeChecker();
// get number node (ast shape validated by snapshot)
const arrayMember = (parseResult.ast as any).body[0].declarations[0].init
.elements[0];
expect(parseResult).toHaveProperty('services.esTreeNodeToTSNodeMap');
// get corresponding TS node
const tsArrayMember = parseResult.services.esTreeNodeToTSNodeMap!.get(
arrayMember,
);
expect(tsArrayMember).toBeDefined();
expect(tsArrayMember.kind).toBe(ts.SyntaxKind.NumericLiteral);
expect((tsArrayMember as ts.NumericLiteral).text).toBe('3');
// get type of TS node
const arrayMemberType: any = checker.getTypeAtLocation(tsArrayMember);
expect(arrayMemberType.flags).toBe(ts.TypeFlags.NumberLiteral);
expect(arrayMemberType.value).toBe(3);
// make sure it maps back to original ESTree node
expect(parseResult).toHaveProperty('services.tsNodeToESTreeNodeMap');
expect(parseResult.services.tsNodeToESTreeNodeMap!.get(tsArrayMember)).toBe(
arrayMember,
);
// get bound name
const boundName = (parseResult.ast as any).body[0].declarations[0].id;
expect(boundName.name).toBe('x');
const tsBoundName = parseResult.services.esTreeNodeToTSNodeMap!.get(
boundName,
);
expect(tsBoundName).toBeDefined();
checkNumberArrayType(checker, tsBoundName);
expect(parseResult.services.tsNodeToESTreeNodeMap!.get(tsBoundName)).toBe(
boundName,
);
}
/**
* Verifies that the type of a TS node is number[] as expected
* @param {ts.TypeChecker} checker
* @param {ts.Node} tsNode
*/
function checkNumberArrayType(checker: ts.TypeChecker, tsNode: ts.Node) {
const nodeType = checker.getTypeAtLocation(tsNode);
expect(nodeType.flags).toBe(ts.TypeFlags.Object);
expect((nodeType as ts.ObjectType).objectFlags).toBe(
ts.ObjectFlags.Reference,
);
expect((nodeType as ts.TypeReference).typeArguments).toHaveLength(1);
expect((nodeType as ts.TypeReference).typeArguments![0].flags).toBe(
ts.TypeFlags.Number,
);
}