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
在特定文件中运行特定测试:
yarn test -f "partial-filename" -t "as split node"
npm测试，或笑话可以取代纱线测试，这取决于你喜欢的JS捆绑器。
这将只尝试在包含some-partial-filename的文件中查找测试，并且在这些文件中，测试将需要有一个describe或it指令，例如提到“作为分割节点”
// In cool-partial-filename.js
describe("with a less indented sibling", () => {
it("should create a new check-list-item with the same indent as split node", () => {
console.log("This would run with the invocation above");
})
})
其他回答
“test”： “jest api/ds_server/ds_server.test.js”
一个简单可行的解决方案:
yarn test -g文件名或
npm test -g fileName
例子:
yarn test -g cancelTransaction或
取消事务
关于测试过滤器的更多信息:
Test Filters
--fgrep, -f Only run tests containing this string [string]
--grep, -g Only run tests matching this string or regexp [string]
--invert, -i Inverts --grep and --fgrep matches [boolean]
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.
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'
使用该命令:
npx jest test --runTestsByPath <path-to-file>
