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
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'
其他回答
你有两个选择:
Option 1: Command line. You can run the following command node '/Users/complete-path-to-you-project/your-project/node_modules/.bin/jest' '/Users/complete-path-to-you-project/your-project/path-to-your-file-within-the-project/your-file.spec.ts' This avoids you to install Jest globally. You use the jest used by your project. Option 2: If you are using Visual Studio Code you have a great plugin to do this: Jest Runner. It allows you not only to run tests file by file, but even specific suites and specs just by a right click on the tests you want to run.
至少从2019年开始:
NPM test——bar.spec.js
2015年:
为了运行特定的测试，您需要使用jest命令。NPM测试无效。要在命令行上直接访问jest，可以通过npm i -g jest-cli或yarn global add jest-cli安装它。
然后使用jest bar.spec.js运行特定的测试。
注意:您不必输入测试文件的完整路径。参数被解释为正则表达式。完整路径的任何部分都可以唯一地标识一个文件。
下面的命令对我有用。 NPX jest -i file-name
不需要指定文件的完整路径，文件名就足够了。
编辑: 找到了另一种方法。 function -i file-name用于功能测试 运行test:integration -i file-name for integration test
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
你可以使用npm test的文件名——
npm test -- fileName.jsx
