mirror of
https://gitee.com/WeBank/fes.js.git
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355 lines
20 KiB
Markdown
355 lines
20 KiB
Markdown
# @fesjs/plugin-jest
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集成 [Jest](https://www.jestjs.cn/) 测试框架，目前只支持单元测试和覆盖测试。
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## 启用方式
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在 `package.json` 中引入依赖：
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```json
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{
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"dependencies": {
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"@fesjs/fes": "^2.0.0",
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"@fesjs/plugin-jest": "^2.0.0"
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},
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}
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```
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## 约定
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- 项目根目录下 `tests` 和 `__tests__` 文件夹中的 `js` 或者 `jsx` 文件为测试文件。
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- 需要覆盖测试的文件范围是`src/index.{js,jsx,ts,tsx,vue}`
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例如测试文件 `add.js`：
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```
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fes-template
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├── __tests__
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│ └── add.js
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└── src
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├── .fes
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└── utils
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└── sum.js
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```
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内容如下：
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```js
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import sum from '@/utils/sum';
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test('adds 1 + 2 to equal 3', () => {
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expect(sum(1, 2)).toBe(3);
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});
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```
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## 命令
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在 `fes` 上注册 `test` 命令：
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```bash
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$ fes test
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```
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## 配置
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插件实现 Jest 的全部配置，具体请查看 [文档-configuration](https://www.jestjs.cn/docs/configuration#reference)。 也可以使用 `-h` 打印配置帮助信息：
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### args 变量
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```bash
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$ fes test -h
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```
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打印配置帮助信息:
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```
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$ fes test -h
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Usage: fes test [options]
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run unit tests with jest
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Options:
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--all The opposite of `onlyChanged`. If `onlyChanged`
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is set by default, running jest with `--all`
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will force Jest to run all tests instead of
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running only tests related to changed files.
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--automock Automock all files by default.
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-b --bail Exit the test suite immediately after `n`
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number of failing tests.
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--browser Respect the "browser" field in package.json
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when resolving modules. Some packages export
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different versions based on whether they are
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operating in node.js or a browser.
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--cache Whether to use the transform cache. Disable the
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cache using --no-cache.
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--cacheDirectory The directory where Jest should store its
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cached dependency information.
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--changedFilesWithAncestor Runs tests related to the current changes and
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the changes made in the last commit. Behaves
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similarly to `--onlyChanged`.
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--changedSince Runs tests related to the changes since the
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provided branch. If the current branch has
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diverged from the given branch, then only
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changes made locally will be tested. Behaves
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similarly to `--onlyChanged`.
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--ci Whether to run Jest in continuous integration
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(CI) mode. This option is on by default in most
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popular CI environments. It will prevent
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snapshots from being written unless explicitly
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requested.
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--clearCache Clears the configured Jest cache directory and
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then exits. Default directory can be found by
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calling jest --showConfig
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--clearMocks Automatically clear mock calls and instances
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between every test. Equivalent to calling
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jest.clearAllMocks() between each test.
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--collectCoverage Alias for --coverage.
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--collectCoverageFrom A glob pattern relative to <rootDir> matching
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the files that coverage info needs to be
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collected from.
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--collectCoverageOnlyFrom Explicit list of paths coverage will be
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restricted to.
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--color Forces test results output color highlighting
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(even if stdout is not a TTY). Set to false if
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you would like to have no colors.
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--colors Alias for `--color`.
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-c --config The path to a jest config file specifying how
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to find and execute tests. If no rootDir is set
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in the config, the directory containing the
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config file is assumed to be the rootDir for
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the project.This can also be a JSON encoded
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value which Jest will use as configuration.
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--coverage Indicates that test coverage information should
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be collected and reported in the output.
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--coverageDirectory The directory where Jest should output its
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coverage files.
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--coveragePathIgnorePatterns An array of regexp pattern strings that are
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matched against all file paths before executing
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the test. If the file pathmatches any of the
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patterns, coverage information will be skipped.
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--coverageProvider Select between Babel and V8 to collect coverage
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--coverageReporters A list of reporter names that Jest uses when
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writing coverage reports. Any istanbul reporter
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can be used.
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--coverageThreshold A JSON string with which will be used to
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configure minimum threshold enforcement for
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coverage results
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--debug Print debugging info about your jest config.
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--detectLeaks **EXPERIMENTAL**: Detect memory leaks in tests.
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After executing a test, it will try to garbage
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collect the global object used, and fail if it
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was leaked
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--detectOpenHandles Print out remaining open handles preventing
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Jest from exiting at the end of a test run.
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Implies `runInBand`.
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--env The test environment used for all tests. This
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can point to any file or node module. Examples:
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`jsdom`, `node` or `path/to/my-environment.js`
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--errorOnDeprecated Make calling deprecated APIs throw helpful
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error messages.
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-e --expand Use this flag to show full diffs instead of a
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patch.
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--filter Path to a module exporting a filtering
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function. This method receives a list of tests
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which can be manipulated to exclude tests from
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running. Especially useful when used in
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conjunction with a testing infrastructure to
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filter known broken tests.
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--findRelatedTests Find related tests for a list of source files
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that were passed in as arguments. Useful for
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pre-commit hook integration to run the minimal
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amount of tests necessary.
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--forceExit Force Jest to exit after all tests have
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completed running. This is useful when
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resources set up by test code cannot be
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adequately cleaned up.
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--globalSetup The path to a module that runs before All
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Tests.
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--globalTeardown The path to a module that runs after All Tests.
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--globals A JSON string with map of global variables that
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need to be available in all test environments.
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--haste A JSON string with map of variables for the
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haste module system
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--init Generate a basic configuration file
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--injectGlobals Should Jest inject global variables or not
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--json Prints the test results in JSON. This mode will
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send all other test output and user messages to
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stderr.
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--lastCommit Run all tests affected by file changes in the
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last commit made. Behaves similarly to
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`--onlyChanged`.
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--listTests Lists all tests Jest will run given the
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arguments and exits. Most useful in a CI system
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together with `--findRelatedTests` to determine
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the tests Jest will run based on specific files
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--logHeapUsage Logs the heap usage after every test. Useful to
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debug memory leaks. Use together with
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`--runInBand` and `--expose-gc` in node.
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--mapCoverage Maps code coverage reports against original source code when transformers supply source maps.
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DEPRECATED
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--maxConcurrency Specifies the maximum number of tests that are
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allowed to runconcurrently. This only affects
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tests using `test.concurrent`.
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-w --maxWorkers Specifies the maximum number of workers the
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worker-pool will spawn for running tests. This
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defaults to the number of the cores available
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on your machine. (its usually best not to
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override this default)
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--moduleDirectories An array of directory names to be searched
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recursively up from the requiring module's
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location.
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--moduleFileExtensions An array of file extensions your modules use.
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If you require modules without specifying a
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file extension, these are the extensions Jest
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will look for.
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--moduleNameMapper A JSON string with a map from regular
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expressions to module names or to arrays of
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module names that allow to stub out resources,
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like images or styles with a single module
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--modulePathIgnorePatterns An array of regexp pattern strings that are
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matched against all module paths before those
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paths are to be considered "visible" to the
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module loader.
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--modulePaths An alternative API to setting the NODE_PATH env
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variable, modulePaths is an array of absolute
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paths to additional locations to search when
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resolving modules.
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--noStackTrace Disables stack trace in test results output
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--notify Activates notifications for test results.
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--notifyMode Specifies when notifications will appear for
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test results.
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-o --onlyChanged Attempts to identify which tests to run based
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on which files have changed in the current
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repository. Only works if you're running tests
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in a git or hg repository at the moment.
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-f --onlyFailures Run tests that failed in the previous
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execution.
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--outputFile Write test results to a file when the --json
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option is also specified.
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--passWithNoTests Will not fail if no tests are found (for
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example while using `--testPathPattern`.)
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--preset A preset that is used as a base for Jest's
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configuration.
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--prettierPath The path to the "prettier" module used for
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inline snapshots.
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--projects A list of projects that use Jest to run all
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tests of all projects in a single instance of
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Jest.
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--reporters A list of custom reporters for the test suite.
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--resetMocks Automatically reset mock state between every
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test. Equivalent to calling
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jest.resetAllMocks() between each test.
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--resetModules If enabled, the module registry for every test
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file will be reset before running each
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individual test.
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--resolver A JSON string which allows the use of a custom
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resolver.
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--restoreMocks Automatically restore mock state and
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implementation between every test. Equivalent
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to calling jest.restoreAllMocks() between each
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test.
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--rootDir The root directory that Jest should scan for
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tests and modules within.
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--roots A list of paths to directories that Jest should
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use to search for files in.
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-i --runInBand Run all tests serially in the current process
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(rather than creating a worker pool of child
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processes that run tests). This is sometimes
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useful for debugging, but such use cases are
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pretty rare.
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--runTestsByPath Used when provided patterns are exact file
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paths. This avoids converting them into a
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regular expression and matching it against
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every single file.
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--runner Allows to use a custom runner instead of Jest's
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default test runner.
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--selectProjects Run only the tests of the specified
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projects.Jest uses the attribute `displayName`
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in the configuration to identify each project.
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--setupFiles A list of paths to modules that run some code
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to configure or set up the testing environment
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before each test.
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--setupFilesAfterEnv A list of paths to modules that run some code
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to configure or set up the testing framework
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before each test
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--showConfig Print your jest config and then exits.
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--silent Prevent tests from printing messages through
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the console.
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--skipFilter Disables the filter provided by --filter.
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Useful for CI jobs, or local enforcement when
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fixing tests.
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--snapshotSerializers A list of paths to snapshot serializer modules
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Jest should use for snapshot testing.
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--testEnvironment Alias for --env
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--testEnvironmentOptions Test environment options that will be passed to
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the testEnvironment. The relevant options
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depend on the environment.
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--testFailureExitCode Exit code of `jest` command if the test run
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failed
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--testLocationInResults Add `location` information to the test results
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--testMatch The glob patterns Jest uses to detect test
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files.
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-t --testNamePattern Run only tests with a name that matches the
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regex pattern.
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--testPathIgnorePatterns An array of regexp pattern strings that are
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matched against all test paths before executing
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the test. If the test path matches any of the
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patterns, it will be skipped.
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--testPathPattern A regexp pattern string that is matched against
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all tests paths before executing the test.
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--testRegex A string or array of string regexp patterns
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that Jest uses to detect test files.
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--testResultsProcessor Allows the use of a custom results processor.
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This processor must be a node module that
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exports a function expecting as the first
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argument the result object.
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--testRunner Allows to specify a custom test runner. The
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default is `jasmine2`. A path to a custom test
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runner can be provided:
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`<rootDir>/path/to/testRunner.js`.
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--testSequencer Allows to specify a custom test sequencer. The
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default is `@jest/test-sequencer`. A path to a
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custom test sequencer can be provided:
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`<rootDir>/path/to/testSequencer.js`
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--testTimeout This option sets the default timeouts of test
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cases.
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--testURL This option sets the URL for the jsdom
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environment.
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--timers Setting this value to fake allows the use of
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fake timers for functions such as setTimeout.
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--transform A JSON string which maps from regular
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expressions to paths to transformers.
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--transformIgnorePatterns An array of regexp pattern strings that are
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matched against all source file paths before
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transformation.
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--unmockedModulePathPatterns An array of regexp pattern strings that are
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matched against all modules before the module
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loader will automatically return a mock for
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them.
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-u --updateSnapshot Use this flag to re-record snapshots. Can be
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used together with a test suite pattern or with
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`--testNamePattern` to re-record snapshot for
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test matching the pattern
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--useStderr Divert all output to stderr.
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--verbose Display individual test results with the test
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suite hierarchy.
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--watch Watch files for changes and rerun tests related
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to changed files. If you want to re-run all
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tests when a file has changed, use the
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`--watchAll` option.
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--watchAll Watch files for changes and rerun all tests. If
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you want to re-run only the tests related to
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the changed files, use the `--watch` option.
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--watchPathIgnorePatterns An array of regexp pattern strings that are
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matched against all paths before trigger test
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re-run in watch mode. If the test path matches
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any of the patterns, it will be skipped.
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--watchman Whether to use watchman for file crawling.
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Disable using --no-watchman.
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-h, --help display help for command
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```
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比如覆盖测试：
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```
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fes test --coverage
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```
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### 配置文件
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除了插件内置的默认配置之外，插件遵循 `Jest`的配置文件规范，约定项目根目录下的 `jest.config.js` 为用户配置文件，约定 `packages.json` 的 `jest` 属性内容也是配置。
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### 优先级
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`args` 配置 > `package.json`中的 `jest` > `jest.config.js` > 默认配置 |