Node.js 使用Jest和Typescript测试单个文件

如何使用Jest和Typescript测试运行单个文件？我试图运行的文件名为

des.spec.ts

如果我

cd

进入包含该文件的目录并运行：

npx jest -t 'des.spec.ts'

Jest每次这样做大约一分钟：

[……]获取元数据

然后不运行测试

我有以下配置：

module.exports = {
    "roots": [
      "<rootDir>/src/lib/"
    ],
    testMatch: [
      "**/__tests__/**/*.+(ts|tsx|js)",
      "**/?(*.)+(spec|test).+(ts|tsx|js)"
    ],
    "transform": {
      "^.+\\.(ts|tsx)$": "ts-jest"
    }
  }

module.exports={
“根”：[
“/src/lib/”
],
测试匹配：[
“***/\uuuuuuuuuuu测试”+（ts | tsx | js）”，
“***/？（*）+（规范测试）。+（ts | tsx | js）”
],
“转变”：{
“^.+\.（ts | tsx）$”：“ts笑话”
}
}

---

想法？

npm脚本的

package.json

：

"scripts": {
  "test": "jest"
}

jest.config.js

：

module.exports = {
  preset: 'ts-jest/presets/js-with-ts',
  testEnvironment: 'enzyme',
  setupFilesAfterEnv: [
    'jest-enzyme',
    './jest.setup.js',
  ],
  testMatch: ['**/?(*.)+(spec|test).[jt]s?(x)'],
  verbose: true,
};

为了为单个文件运行测试用例，只需在

npm t--

之后指定测试文件的绝对路径：

☁  react-apollo-graphql-starter-kit [master] npm t -- /Users/ldu020/workspace/github.com/mrdulin/react-apollo-graphql-starter-kit/stackoverflow/61928263/index.test.jsx

> react-apollo-graphql-starter-kit@1.0.0 test /Users/ldu020/workspace/github.com/mrdulin/react-apollo-graphql-starter-kit
> jest "/Users/ldu020/workspace/github.com/mrdulin/react-apollo-graphql-starter-kit/stackoverflow/61928263/index.test.jsx"

 PASS  stackoverflow/61928263/index.test.jsx
  61928263
    ✓ should pass without using mock store (34ms)

Test Suites: 1 passed, 1 total
Tests:       1 passed, 1 total
Snapshots:   0 total
Time:        5.648s, estimated 9s
Ran all test suites matching /\/Users\/ldu020\/workspace\/github.com\/mrdulin\/react-apollo-graphql-starter-kit\/stackoverflow\/61928263\/index.test.jsx/i.

覆盖率测试：

☁  react-apollo-graphql-starter-kit [master] npm t -- --coverage /Users/ldu020/workspace/github.com/mrdulin/react-apollo-graphql-starter-kit/stackoverflow/61928263/index.test.jsx

> react-apollo-graphql-starter-kit@1.0.0 test /Users/ldu020/workspace/github.com/mrdulin/react-apollo-graphql-starter-kit
> jest "--coverage" "/Users/ldu020/workspace/github.com/mrdulin/react-apollo-graphql-starter-kit/stackoverflow/61928263/index.test.jsx"

 PASS  stackoverflow/61928263/index.test.jsx
  61928263
    ✓ should pass without using mock store (35ms)

--------------------|---------|----------|---------|---------|-------------------
File                | % Stmts | % Branch | % Funcs | % Lines | Uncovered Line #s 
--------------------|---------|----------|---------|---------|-------------------
All files           |     100 |      100 |     100 |     100 |                   
 LoadingMessage.jsx |     100 |      100 |     100 |     100 |                   
 index.jsx          |     100 |      100 |     100 |     100 |                   
 user.actions.ts    |     100 |      100 |     100 |     100 |                   
--------------------|---------|----------|---------|---------|-------------------
Test Suites: 1 passed, 1 total
Tests:       1 passed, 1 total
Snapshots:   0 total
Time:        3.453s, estimated 4s
Ran all test suites matching /\/Users\/ldu020\/workspace\/github.com\/mrdulin\/react-apollo-graphql-starter-kit\/stackoverflow\/61928263\/index.test.jsx/i.

---

这对Typescript有用吗？我在

jest.config

中没有看到

ts jest

转换，所以我很好奇它是如何工作的？