angular-cn/packages/compiler-cli/ngcc/test/dependencies/module_resolver_spec.ts

208 lines
9.2 KiB
TypeScript

/**
* @license
* Copyright Google Inc. 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 {AbsoluteFsPath} from '../../../src/ngtsc/path';
import {ModuleResolver, ResolvedDeepImport, ResolvedExternalModule, ResolvedRelativeModule} from '../../src/dependencies/module_resolver';
import {MockFileSystem} from '../helpers/mock_file_system';
const _ = AbsoluteFsPath.from;
function createMockFileSystem() {
return new MockFileSystem({
'/libs': {
'local-package': {
'package.json': 'PACKAGE.JSON for local-package',
'index.js': `import {X} from './x';`,
'x.js': `export class X {}`,
'sub-folder': {
'index.js': `import {X} from '../x';`,
},
'node_modules': {
'package-1': {
'sub-folder': {'index.js': `export class Z {}`},
'package.json': 'PACKAGE.JSON for package-1',
},
},
},
'node_modules': {
'package-2': {
'package.json': 'PACKAGE.JSON for package-2',
'node_modules': {
'package-3': {
'package.json': 'PACKAGE.JSON for package-3',
},
},
},
},
},
'/dist': {
'package-4': {
'x.js': `export class X {}`,
'package.json': 'PACKAGE.JSON for package-4',
'sub-folder': {'index.js': `import {X} from '@shared/package-4/x';`},
},
'sub-folder': {
'package-4': {
'package.json': 'PACKAGE.JSON for package-4',
},
'package-5': {
'package.json': 'PACKAGE.JSON for package-5',
'post-fix': {
'package.json': 'PACKAGE.JSON for package-5/post-fix',
}
},
}
},
'/node_modules': {
'top-package': {
'package.json': 'PACKAGE.JSON for top-package',
}
}
});
}
describe('ModuleResolver', () => {
describe('resolveModule()', () => {
describe('with relative paths', () => {
it('should resolve sibling, child and aunt modules', () => {
const resolver = new ModuleResolver(createMockFileSystem());
expect(resolver.resolveModuleImport('./x', _('/libs/local-package/index.js')))
.toEqual(new ResolvedRelativeModule(_('/libs/local-package/x.js')));
expect(resolver.resolveModuleImport('./sub-folder', _('/libs/local-package/index.js')))
.toEqual(new ResolvedRelativeModule(_('/libs/local-package/sub-folder/index.js')));
expect(resolver.resolveModuleImport('../x', _('/libs/local-package/sub-folder/index.js')))
.toEqual(new ResolvedRelativeModule(_('/libs/local-package/x.js')));
});
it('should return `null` if the resolved module relative module does not exist', () => {
const resolver = new ModuleResolver(createMockFileSystem());
expect(resolver.resolveModuleImport('./y', _('/libs/local-package/index.js'))).toBe(null);
});
});
describe('with non-mapped external paths', () => {
it('should resolve to the package.json of a local node_modules package', () => {
const resolver = new ModuleResolver(createMockFileSystem());
expect(resolver.resolveModuleImport('package-1', _('/libs/local-package/index.js')))
.toEqual(new ResolvedExternalModule(_('/libs/local-package/node_modules/package-1')));
expect(
resolver.resolveModuleImport('package-1', _('/libs/local-package/sub-folder/index.js')))
.toEqual(new ResolvedExternalModule(_('/libs/local-package/node_modules/package-1')));
expect(resolver.resolveModuleImport('package-1', _('/libs/local-package/x.js')))
.toEqual(new ResolvedExternalModule(_('/libs/local-package/node_modules/package-1')));
});
it('should resolve to the package.json of a higher node_modules package', () => {
const resolver = new ModuleResolver(createMockFileSystem());
expect(resolver.resolveModuleImport('package-2', _('/libs/local-package/index.js')))
.toEqual(new ResolvedExternalModule(_('/libs/node_modules/package-2')));
expect(resolver.resolveModuleImport('top-package', _('/libs/local-package/index.js')))
.toEqual(new ResolvedExternalModule(_('/node_modules/top-package')));
});
it('should return `null` if the package cannot be found', () => {
const resolver = new ModuleResolver(createMockFileSystem());
expect(resolver.resolveModuleImport('missing-2', _('/libs/local-package/index.js')))
.toBe(null);
});
it('should return `null` if the package is not accessible because it is in a inner node_modules package',
() => {
const resolver = new ModuleResolver(createMockFileSystem());
expect(resolver.resolveModuleImport('package-3', _('/libs/local-package/index.js')))
.toBe(null);
});
it('should identify deep imports into an external module', () => {
const resolver = new ModuleResolver(createMockFileSystem());
expect(
resolver.resolveModuleImport('package-1/sub-folder', _('/libs/local-package/index.js')))
.toEqual(
new ResolvedDeepImport(_('/libs/local-package/node_modules/package-1/sub-folder')));
});
});
describe('with mapped path external modules', () => {
it('should resolve to the package.json of simple mapped packages', () => {
const resolver = new ModuleResolver(
createMockFileSystem(), {baseUrl: '/dist', paths: {'*': ['*', 'sub-folder/*']}});
expect(resolver.resolveModuleImport('package-4', _('/libs/local-package/index.js')))
.toEqual(new ResolvedExternalModule(_('/dist/package-4')));
expect(resolver.resolveModuleImport('package-5', _('/libs/local-package/index.js')))
.toEqual(new ResolvedExternalModule(_('/dist/sub-folder/package-5')));
});
it('should select the best match by the length of prefix before the *', () => {
const resolver = new ModuleResolver(createMockFileSystem(), {
baseUrl: '/dist',
paths: {
'@lib/*': ['*'],
'@lib/sub-folder/*': ['*'],
}
});
// We should match the second path (e.g. `'@lib/sub-folder/*'`), which will actually map to
// `*` and so the final resolved path will not include the `sub-folder` segment.
expect(resolver.resolveModuleImport(
'@lib/sub-folder/package-4', _('/libs/local-package/index.js')))
.toEqual(new ResolvedExternalModule(_('/dist/package-4')));
});
it('should follow the ordering of `paths` when matching mapped packages', () => {
let resolver: ModuleResolver;
const fs = createMockFileSystem();
resolver = new ModuleResolver(fs, {baseUrl: '/dist', paths: {'*': ['*', 'sub-folder/*']}});
expect(resolver.resolveModuleImport('package-4', _('/libs/local-package/index.js')))
.toEqual(new ResolvedExternalModule(_('/dist/package-4')));
resolver = new ModuleResolver(fs, {baseUrl: '/dist', paths: {'*': ['sub-folder/*', '*']}});
expect(resolver.resolveModuleImport('package-4', _('/libs/local-package/index.js')))
.toEqual(new ResolvedExternalModule(_('/dist/sub-folder/package-4')));
});
it('should resolve packages when the path mappings have post-fixes', () => {
const resolver = new ModuleResolver(
createMockFileSystem(), {baseUrl: '/dist', paths: {'*': ['sub-folder/*/post-fix']}});
expect(resolver.resolveModuleImport('package-5', _('/libs/local-package/index.js')))
.toEqual(new ResolvedExternalModule(_('/dist/sub-folder/package-5/post-fix')));
});
it('should match paths against complex path matchers', () => {
const resolver = new ModuleResolver(
createMockFileSystem(), {baseUrl: '/dist', paths: {'@shared/*': ['sub-folder/*']}});
expect(resolver.resolveModuleImport('@shared/package-4', _('/libs/local-package/index.js')))
.toEqual(new ResolvedExternalModule(_('/dist/sub-folder/package-4')));
expect(resolver.resolveModuleImport('package-5', _('/libs/local-package/index.js')))
.toBe(null);
});
it('should resolve path as "relative" if the mapped path is inside the current package',
() => {
const resolver = new ModuleResolver(
createMockFileSystem(), {baseUrl: '/dist', paths: {'@shared/*': ['*']}});
expect(resolver.resolveModuleImport(
'@shared/package-4/x', _('/dist/package-4/sub-folder/index.js')))
.toEqual(new ResolvedRelativeModule(_('/dist/package-4/x.js')));
});
it('should resolve paths where the wildcard matches more than one path segment', () => {
const resolver = new ModuleResolver(
createMockFileSystem(),
{baseUrl: '/dist', paths: {'@shared/*/post-fix': ['*/post-fix']}});
expect(
resolver.resolveModuleImport(
'@shared/sub-folder/package-5/post-fix', _('/dist/package-4/sub-folder/index.js')))
.toEqual(new ResolvedExternalModule(_('/dist/sub-folder/package-5/post-fix')));
});
});
});
});