228 lines
11 KiB
TypeScript
228 lines
11 KiB
TypeScript
/**
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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 {EsmDependencyHost} from '../../src/dependencies/esm_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('EsmDependencyHost', () => {
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let host: EsmDependencyHost;
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beforeEach(() => {
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const fs = createMockFileSystem();
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host = new EsmDependencyHost(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 imports or re-exports',
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() => {
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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 EsmDependencyHost(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': `import {X} from 'lib-1';\nimport {Y} from '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': `export {X} from 'lib-1';\nexport {Y} from 'lib-1/sub-1';`,
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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': `import {X} from 'lib-1';\nimport {Y} from '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': `import {Y} from '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': `import {X} from '../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': `import {Y} from 'lib-1/sub-1'; export declare class X {}`,
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'/internal/circular-a/index.js':
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`import {B} from '../circular-b'; import {X} from '../circular-b'; export {Y} from 'lib-1/sub-1';`,
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'/internal/circular-b/index.js':
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`import {A} from '../circular-a'; import {Y} from '../circular-a'; export {X} from 'lib-1';`,
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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': `import {Z} from '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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`import {TestHelper} from '@app/components';\nimport {Service} from '@app/shared';\nimport {TestHelper} from '@lib/shared/test';\nimport {X} from '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.js': 'export declare class X {}',
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'/node_modules/lib-1/package.json': '{"esm2015": "./index.js"}',
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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 declare class DeepImport {}',
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'/node_modules/lib-1/sub-1/index.js': 'export declare class Y {}',
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'/node_modules/lib-1/sub-1/package.json': '{"esm2015": "./index.js"}',
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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.js': `export * from './sub-2/sub-2';`,
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'/node_modules/lib-1/sub-2/sub-2.js': `export declare class Z {}';`,
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'/node_modules/lib-1/sub-2/package.json': '{"esm2015": "./sub-2.js"}',
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'/node_modules/lib-1/sub-2/sub-2.metadata.json': 'MOCK METADATA',
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'/dist/components/index.js': `class MyComponent {};`,
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'/dist/components/package.json': '{"esm2015": "./index.js"}',
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'/dist/components/index.metadata.json': 'MOCK METADATA',
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'/dist/shared/index.js': `import {X} from 'lib-1';\nexport class Service {}`,
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'/dist/shared/package.json': '{"esm2015": "./index.js"}',
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'/dist/shared/index.metadata.json': 'MOCK METADATA',
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'/dist/lib/shared/test/index.js': `export class TestHelper {}`,
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'/dist/lib/shared/test/package.json': '{"esm2015": "./index.js"}',
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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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describe('isStringImportOrReexport', () => {
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it('should return true if the statement is an import', () => {
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expect(host.isStringImportOrReexport(createStatement('import {X} from "some/x";')))
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.toBe(true);
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expect(host.isStringImportOrReexport(createStatement('import * as X from "some/x";')))
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.toBe(true);
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});
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it('should return true if the statement is a re-export', () => {
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expect(host.isStringImportOrReexport(createStatement('export {X} from "some/x";')))
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.toBe(true);
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expect(host.isStringImportOrReexport(createStatement('export * from "some/x";'))).toBe(true);
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});
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it('should return false if the statement is not an import or a re-export', () => {
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expect(host.isStringImportOrReexport(createStatement('class X {}'))).toBe(false);
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expect(host.isStringImportOrReexport(createStatement('export function foo() {}')))
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.toBe(false);
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expect(host.isStringImportOrReexport(createStatement('export const X = 10;'))).toBe(false);
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});
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function createStatement(source: string) {
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return ts
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.createSourceFile('source.js', source, ts.ScriptTarget.ES2015, false, ts.ScriptKind.JS)
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.statements[0];
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}
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});
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describe('hasImportOrReexportStatements', () => {
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it('should return true if there is an import statement', () => {
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expect(host.hasImportOrReexportStatements('import {X} from "some/x";')).toBe(true);
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expect(host.hasImportOrReexportStatements('import * as X from "some/x";')).toBe(true);
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expect(
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host.hasImportOrReexportStatements('blah blah\n\n import {X} from "some/x";\nblah blah'))
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.toBe(true);
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expect(host.hasImportOrReexportStatements('\t\timport {X} from "some/x";')).toBe(true);
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});
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it('should return true if there is a re-export statement', () => {
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expect(host.hasImportOrReexportStatements('export {X} from "some/x";')).toBe(true);
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expect(
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host.hasImportOrReexportStatements('blah blah\n\n export {X} from "some/x";\nblah blah'))
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.toBe(true);
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expect(host.hasImportOrReexportStatements('\t\texport {X} from "some/x";')).toBe(true);
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expect(host.hasImportOrReexportStatements(
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'blah blah\n\n export * from "@angular/core;\nblah blah'))
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.toBe(true);
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});
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it('should return false if there is no import nor re-export statement', () => {
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expect(host.hasImportOrReexportStatements('blah blah')).toBe(false);
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expect(host.hasImportOrReexportStatements('export function moo() {}')).toBe(false);
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expect(
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host.hasImportOrReexportStatements('Some text that happens to include the word import'))
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.toBe(false);
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});
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});
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}); |