186 lines
9.0 KiB
TypeScript
186 lines
9.0 KiB
TypeScript
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/**
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* @license
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* Copyright Google Inc. All Rights Reserved.
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*
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* Use of this source code is governed by an MIT-style license that can be
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* found in the LICENSE file at https://angular.io/license
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*/
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import * as ts from 'typescript';
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import {AbsoluteFsPath, PathSegment} from '../../../src/ngtsc/path';
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import {CommonJsDependencyHost} from '../../src/dependencies/commonjs_dependency_host';
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import {ModuleResolver} from '../../src/dependencies/module_resolver';
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import {MockFileSystem} from '../helpers/mock_file_system';
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const _ = AbsoluteFsPath.from;
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describe('CommonJsDependencyHost', () => {
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let host: CommonJsDependencyHost;
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beforeEach(() => {
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const fs = createMockFileSystem();
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host = new CommonJsDependencyHost(fs, new ModuleResolver(fs));
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});
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describe('getDependencies()', () => {
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it('should not generate a TS AST if the source does not contain any require calls', () => {
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spyOn(ts, 'createSourceFile');
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host.findDependencies(_('/no/imports/or/re-exports/index.js'));
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expect(ts.createSourceFile).not.toHaveBeenCalled();
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});
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it('should resolve all the external imports of the source file', () => {
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const {dependencies, missing, deepImports} =
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host.findDependencies(_('/external/imports/index.js'));
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expect(dependencies.size).toBe(2);
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expect(missing.size).toBe(0);
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expect(deepImports.size).toBe(0);
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expect(dependencies.has(_('/node_modules/lib_1'))).toBe(true);
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expect(dependencies.has(_('/node_modules/lib_1/sub_1'))).toBe(true);
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});
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it('should resolve all the external re-exports of the source file', () => {
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const {dependencies, missing, deepImports} =
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host.findDependencies(_('/external/re-exports/index.js'));
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expect(dependencies.size).toBe(2);
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expect(missing.size).toBe(0);
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expect(deepImports.size).toBe(0);
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expect(dependencies.has(_('/node_modules/lib_1'))).toBe(true);
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expect(dependencies.has(_('/node_modules/lib_1/sub_1'))).toBe(true);
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});
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it('should capture missing external imports', () => {
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const {dependencies, missing, deepImports} =
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host.findDependencies(_('/external/imports-missing/index.js'));
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expect(dependencies.size).toBe(1);
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expect(dependencies.has(_('/node_modules/lib_1'))).toBe(true);
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expect(missing.size).toBe(1);
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expect(missing.has(PathSegment.fromFsPath('missing'))).toBe(true);
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expect(deepImports.size).toBe(0);
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});
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it('should not register deep imports as missing', () => {
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// This scenario verifies the behavior of the dependency analysis when an external import
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// is found that does not map to an entry-point but still exists on disk, i.e. a deep import.
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// Such deep imports are captured for diagnostics purposes.
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const {dependencies, missing, deepImports} =
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host.findDependencies(_('/external/deep-import/index.js'));
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expect(dependencies.size).toBe(0);
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expect(missing.size).toBe(0);
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expect(deepImports.size).toBe(1);
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expect(deepImports.has(_('/node_modules/lib_1/deep/import'))).toBe(true);
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});
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it('should recurse into internal dependencies', () => {
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const {dependencies, missing, deepImports} =
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host.findDependencies(_('/internal/outer/index.js'));
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expect(dependencies.size).toBe(1);
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expect(dependencies.has(_('/node_modules/lib_1/sub_1'))).toBe(true);
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expect(missing.size).toBe(0);
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expect(deepImports.size).toBe(0);
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});
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it('should handle circular internal dependencies', () => {
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const {dependencies, missing, deepImports} =
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host.findDependencies(_('/internal/circular_a/index.js'));
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expect(dependencies.size).toBe(2);
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expect(dependencies.has(_('/node_modules/lib_1'))).toBe(true);
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expect(dependencies.has(_('/node_modules/lib_1/sub_1'))).toBe(true);
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expect(missing.size).toBe(0);
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expect(deepImports.size).toBe(0);
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});
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it('should support `paths` alias mappings when resolving modules', () => {
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const fs = createMockFileSystem();
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host = new CommonJsDependencyHost(fs, new ModuleResolver(fs, {
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baseUrl: '/dist',
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paths: {
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'@app/*': ['*'],
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'@lib/*/test': ['lib/*/test'],
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}
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}));
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const {dependencies, missing, deepImports} = host.findDependencies(_('/path-alias/index.js'));
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expect(dependencies.size).toBe(4);
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expect(dependencies.has(_('/dist/components'))).toBe(true);
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expect(dependencies.has(_('/dist/shared'))).toBe(true);
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expect(dependencies.has(_('/dist/lib/shared/test'))).toBe(true);
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expect(dependencies.has(_('/node_modules/lib_1'))).toBe(true);
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expect(missing.size).toBe(0);
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expect(deepImports.size).toBe(0);
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});
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});
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function createMockFileSystem() {
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return new MockFileSystem({
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'/no/imports/or/re-exports/index.js': '// some text but no import-like statements',
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'/no/imports/or/re-exports/package.json': '{"esm2015": "./index.js"}',
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'/no/imports/or/re-exports/index.metadata.json': 'MOCK METADATA',
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'/external/imports/index.js': commonJs(['lib_1', 'lib_1/sub_1']),
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'/external/imports/package.json': '{"esm2015": "./index.js"}',
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'/external/imports/index.metadata.json': 'MOCK METADATA',
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'/external/re-exports/index.js':
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commonJs(['lib_1', 'lib_1/sub_1'], ['lib_1.X', 'lib_1sub_1.Y']),
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'/external/re-exports/package.json': '{"esm2015": "./index.js"}',
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'/external/re-exports/index.metadata.json': 'MOCK METADATA',
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'/external/imports-missing/index.js': commonJs(['lib_1', 'missing']),
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'/external/imports-missing/package.json': '{"esm2015": "./index.js"}',
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'/external/imports-missing/index.metadata.json': 'MOCK METADATA',
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'/external/deep-import/index.js': commonJs(['lib_1/deep/import']),
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'/external/deep-import/package.json': '{"esm2015": "./index.js"}',
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'/external/deep-import/index.metadata.json': 'MOCK METADATA',
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'/internal/outer/index.js': commonJs(['../inner']),
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'/internal/outer/package.json': '{"esm2015": "./index.js"}',
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'/internal/outer/index.metadata.json': 'MOCK METADATA',
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'/internal/inner/index.js': commonJs(['lib_1/sub_1'], ['X']),
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'/internal/circular_a/index.js': commonJs(['../circular_b', 'lib_1/sub_1'], ['Y']),
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'/internal/circular_b/index.js': commonJs(['../circular_a', 'lib_1'], ['X']),
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'/internal/circular_a/package.json': '{"esm2015": "./index.js"}',
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'/internal/circular_a/index.metadata.json': 'MOCK METADATA',
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'/re-directed/index.js': commonJs(['lib_1/sub_2']),
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'/re-directed/package.json': '{"esm2015": "./index.js"}',
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'/re-directed/index.metadata.json': 'MOCK METADATA',
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'/path-alias/index.js':
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commonJs(['@app/components', '@app/shared', '@lib/shared/test', 'lib_1']),
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'/path-alias/package.json': '{"esm2015": "./index.js"}',
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'/path-alias/index.metadata.json': 'MOCK METADATA',
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'/node_modules/lib_1/index.d.ts': 'export declare class X {}',
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'/node_modules/lib_1/package.json': '{"esm2015": "./index.js", "typings": "./index.d.ts"}',
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'/node_modules/lib_1/index.metadata.json': 'MOCK METADATA',
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'/node_modules/lib_1/deep/import/index.js': 'export class DeepImport {}',
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'/node_modules/lib_1/sub_1/index.d.ts': 'export declare class Y {}',
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'/node_modules/lib_1/sub_1/package.json':
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'{"esm2015": "./index.js", "typings": "./index.d.ts"}',
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'/node_modules/lib_1/sub_1/index.metadata.json': 'MOCK METADATA',
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'/node_modules/lib_1/sub_2.d.ts': `export * from './sub_2/sub_2';`,
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'/node_modules/lib_1/sub_2/sub_2.d.ts': `export declare class Z {}';`,
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'/node_modules/lib_1/sub_2/package.json':
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'{"esm2015": "./sub_2.js", "typings": "./sub_2.d.ts"}',
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'/node_modules/lib_1/sub_2/sub_2.metadata.json': 'MOCK METADATA',
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'/dist/components/index.d.ts': `export declare class MyComponent {};`,
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'/dist/components/package.json': '{"esm2015": "./index.js", "typings": "./index.d.ts"}',
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'/dist/components/index.metadata.json': 'MOCK METADATA',
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'/dist/shared/index.d.ts': `import {X} from 'lib_1';\nexport declare class Service {}`,
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'/dist/shared/package.json': '{"esm2015": "./index.js", "typings": "./index.d.ts"}',
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'/dist/shared/index.metadata.json': 'MOCK METADATA',
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'/dist/lib/shared/test/index.d.ts': `export class TestHelper {}`,
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'/dist/lib/shared/test/package.json': '{"esm2015": "./index.js", "typings": "./index.d.ts"}',
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'/dist/lib/shared/test/index.metadata.json': 'MOCK METADATA',
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});
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}
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});
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function commonJs(importPaths: string[], exportNames: string[] = []) {
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const commonJsRequires =
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importPaths
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.map(
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p =>
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`var ${p.replace('@angular/', '').replace(/\.?\.?\//g, '').replace(/@/,'')} = require('${p}');`)
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.join('\n');
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const exportStatements =
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exportNames.map(e => ` exports.${e.replace(/.+\./, '')} = ${e};`).join('\n');
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return `${commonJsRequires}
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${exportStatements}`;
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}
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