Question

我正在尝试为现有的React应用设置测试。我们正在使用React 16.8.13 经过一番挣扎，我使它成功了。为此，我必须安装jest 24.9.0和babel-jest 24.9.0。测试运行正常，我得到一份覆盖率报告。但是，当我运行yarn start时出现错误：

The react-scripts package provided by Create React App requires a dependency:

  "babel-jest": "23.6.0"

Don't try to install it manually: your package manager does it automatically.
However, a different version of babel-jest was detected higher up in the tree:

  /<Path to my App>/node_modules/babel-jest (version: 24.9.0)

同时从jest中删除babel-jest和devDependencies可以解决此问题，但是现在运行yarn test给我一个错误：

No tests found
In /<Path to my App>
  32 files checked.
  testMatch:  - 32 matches
  testPathIgnorePatterns: /node_modules/ - 32 matches
  testRegex: (\/tests\/.*\.test)\.[jt]sx?$ - 0 matches
Pattern:  - 0 matches
error Command failed with exit code 1.

要使应用程序和测试都可运行我需要做什么？

Answer 1

基于No tests found，看来您的测试可能不在正确的文件夹中。它们应该位于src中名为__tests__的文件夹中，并具有test.js或spec.js后缀。

有关更多信息，请参见此答案：Create React App cannot find tests

可以运行React App或使用babel-jest对其进行测试

1 个答案: