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angular-cn/packages/compiler-cli/test/helpers/index.ts

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feat(ivy): introduce concrete types for paths in ngtsc (#28523) This commit introduces a new ngtsc sub-library, 'path', which contains branded string types for the different kind of paths that ngtsc manipulates. Having static types for these paths will reduce the number of path-related bugs (especially on Windows) and will eliminate unnecessary defensive normalizing. See the README.md file for more detail. PR Close #28523
2019-02-01 13:07:34 -05:00
/**
* @license
build: update license headers to reference Google LLC (#37205) Update the license headers throughout the repository to reference Google LLC rather than Google Inc, for the required license headers. PR Close #37205
2020-05-19 15:08:49 -04:00
* Copyright Google LLC All Rights Reserved.
feat(ivy): introduce concrete types for paths in ngtsc (#28523) This commit introduces a new ngtsc sub-library, 'path', which contains branded string types for the different kind of paths that ngtsc manipulates. Having static types for these paths will reduce the number of path-related bugs (especially on Windows) and will eliminate unnecessary defensive normalizing. See the README.md file for more detail. PR Close #28523
2019-02-01 13:07:34 -05:00
*
* 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
*/
refactor(ivy): implement a virtual file-system layer in ngtsc + ngcc (#30921) To improve cross platform support, all file access (and path manipulation) is now done through a well known interface (`FileSystem`). For testing a number of `MockFileSystem` implementations are provided. These provide an in-memory file-system which emulates operating systems like OS/X, Unix and Windows. The current file system is always available via the static method, `FileSystem.getFileSystem()`. This is also used by a number of static methods on `AbsoluteFsPath` and `PathSegment`, to avoid having to pass `FileSystem` objects around all the time. The result of this is that one must be careful to ensure that the file-system has been initialized before using any of these static methods. To prevent this happening accidentally the current file system always starts out as an instance of `InvalidFileSystem`, which will throw an error if any of its methods are called. You can set the current file-system by calling `FileSystem.setFileSystem()`. During testing you can call the helper function `initMockFileSystem(os)` which takes a string name of the OS to emulate, and will also monkey-patch aspects of the TypeScript library to ensure that TS is also using the current file-system. Finally there is the `NgtscCompilerHost` to be used for any TypeScript compilation, which uses a given file-system. All tests that interact with the file-system should be tested against each of the mock file-systems. A series of helpers have been provided to support such tests: * `runInEachFileSystem()` - wrap your tests in this helper to run all the wrapped tests in each of the mock file-systems. * `addTestFilesToFileSystem()` - use this to add files and their contents to the mock file system for testing. * `loadTestFilesFromDisk()` - use this to load a mirror image of files on disk into the in-memory mock file-system. * `loadFakeCore()` - use this to load a fake version of `@angular/core` into the mock file-system. All ngcc and ngtsc source and tests now use this virtual file-system setup. PR Close #30921
2019-06-06 15:22:32 -04:00
export {getAngularPackagesFromRunfiles, resolveNpmTreeArtifact} from './src/runfile_helpers';
export * from './src/mock_file_loading';
test(compiler-cli): improve test performance using shared source file cache (#38909) Some compiler tests take a long time to run, even using multiple executors. A profiling session revealed that most time is spent in parsing source files, especially the default libraries are expensive to parse. The default library files are constant across all tests, so this commit introduces a shared cache of parsed source files of the default libraries. This achieves a significant improvement for several targets on my machine: //packages/compiler-cli/test/compliance: from 23s to 5s. //packages/compiler-cli/test/ngtsc: from 115s to 11s. Note that the number of shards for the compliance tests has been halved, as the extra shards no longer provide any speedup. PR Close #38909
2020-09-13 14:31:33 -04:00
export * from './src/cached_source_files';