REACT JEST错误无法从'jest-expect.js'中找到模块'jest-matchers'

Question

When running tests getting the following error:

Cannot find module 'jest-matchers' from 'jest-expect.js'

  at Resolver.resolveModule (node_modules/jest-resolve/build/index.js:169:17)

Any ideas???

I'm using:

node@6.3.1
npm@4.0.5
jest@19.0.2
jest-matchers@19.0.0

Answer 1

您可以尝试在项目的文件夹上运行npm ls ，以查看缺少的依赖项

Answer 2

尝试删除node_modules文件夹并再次执行npm install 。

Answer 3

Add node_modules to moduleDirectories .

If you have a jest.config.js add it there,

// jest.config.js
module.exports = {
  verbose: true,
  moduleDirectories: ["node_modules"]
};

otherwise should be added to package.json

"jest":{
  ...
  "moduleDirectories": ["node_modules"]
}