我能够使用Jest测试多个文件，但我不知道如何测试单个文件。
我有:
执行npm install jest-cli——save-dev命令 更新包。Json: '{…"scripts": {"test": "jest"}…｝ 编写了许多测试。
运行npm测试可以正常工作(目前运行14个测试)。
如何测试单个文件，例如test app/foo/__tests__/bar.spec.js?
我已经尝试运行npm test app/foo/__tests__/bar.spec.js(从项目根)，但我得到以下错误:
npm犯错!错误:ENOENT，打开'/node_modules/app/foo/tests/bar.spec.js/package.json'
当前回答
我们在Angular中使用了nrwl-nx。在这种情况下，我们可以使用这个命令:
npm test <ng-project> -- --testFile "file-name-part"
注:
npm test will run the test script specified in package.json: "test": "ng test" --: tells npm to pass the following parameters to the test script (instead of consuming them) Thus the rest of the cmd will be passed to ng test <ng-project> is the name of a project in angular.json when you omit this parameter, the "defaultProject" (specified in angular.json) will be used (so you must specify it, when the test is not in your default project) Next we must check which builder is used: In angular.json navigate to "project" - "<ng-project>" - "architect" - "test" and check the "builder", which in our case is: "@nrwl/jest:jest" Now that we know the builder, we need to find the available cmd-line parameters On the command line, run npm test <ng-project> -- --help to see all available options Or check the online documentation One of the options is --testFile which is used here
其他回答
运行单个测试:
npm test -t ValidationUtil # `ValidationUtil` is my module `ValidationUtil.spec.js`
-t -在后面，放置一个包含测试名称的正则表达式。
import LoggerService from '../LoggerService ';
describe('Method called****', () => {
it('00000000', () => {
const logEvent = jest.spyOn(LoggerService, 'logEvent');
expect(logEvent).toBeDefined();
});
});
用法:
npm test -- __tests__/LoggerService.test.ts -t '00000000'
我只是将Jest安装为全局，运行Jest myFileToTest.spec.js，它工作了。
来自Jest文档:
"scripts": {
"test": "jest path/to/my-test.js"
}
使用
npm run test
Jest和Jest Runner是超级有用的VSCode扩展，当你工作在笑话。
自动测试员
Jest Runner在测试上面添加“运行|调试”代码镜头来运行或调试单个测试。
