如何使用Jest测试单个文件?

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

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.

2019-06-26 08:34:20

其他回答

我只是将Jest安装为全局，运行Jest myFileToTest.spec.js，它工作了。

2019-03-28 09:01:57

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");
  })
})

2021-05-08 02:21:32

当时我用的是: