javascript - 让 beforeEach 仅运行其所在文件中的测试

Question

我有两个 Mocha 测试文件，每个文件都有自己的 beforeEach 函数。每个文件中的 beforeEach 对所有测试用例运行。用代码更好地解释:

用户.test.js:

beforeEach((done) => {
  console.log('user before each');
  done();
});
describe('Running user tests', () => {

  it('user test #1',  () => {
    console.log('in user test 1');
  });

  it('user test #2',  () => {
    console.log('in user test 2');
  });

});

tod​​o.test.js

beforeEach((done) => {
  console.log('todo before each');
  done();
});

describe('Running todo tests', () => {

  it('todo test #1',  (done) => {
    console.log('in todo test 1');
    done();
  });

  it('todo test #2',  (done) => {
    console.log('in todo test 2');
    done();
  });

});

package.json

{
  "name": "before-each",
  "version": "1.0.0",
  "description": "",
  "main": "todo.test.js",
  "scripts": {
    "test": "mocha **/*.test.js"
  },
  "author": "",
  "license": "ISC",
  "devDependencies": {
    "mocha": "^5.2.0"
  }
}

运行时输出:npm test

  Running todo tests
todo before each
user before each
in todo test 1
    ✓ todo test #1
todo before each
user before each
in todo test 2
    ✓ todo test #2

  Running user tests
todo before each
user before each
in user test 1
    ✓ user test #1
todo before each
user before each
in user test 2
    ✓ user test #2


  4 passing (7ms)

有没有办法让 todo 文件中的 beforeEach() 仅针对 todo 文件中的测试运行，以及用户文件中的 beforeEach() 仅针对用户测试运行？我有 Java/JUnit 背景，这表现得非常不同。

谢谢!

Answer 1

将 beforeEach 移至 describe 内。这是放置属于特定 describe 的 beforeEach 的正确位置:

describe('Running user tests', () => {
  beforeEach((done) => {
    console.log('user before each');
    done();
  });

  it('user test #1',  () => {
    console.log('in user test 1');
  });

  it('user test #2',  () => {
    console.log('in user test 2');
  });
});