在testRunner设置为jest-circus的情况下访问茉莉花会导致:ReferenceError:茉莉花未定义 [英] Accessing jasmine with testRunner set to jest-circus results in: ReferenceError: jasmine is not defined

问题描述

默认情况下，jest允许您简单地全局访问jasmine.但是，只要将testRunner切换为jest-circus，jasmine就不会被定义.以下是一个最小的，可重复的示例:

On default jest allows you to simply access jasmine globally. But as soon as you switch the testRunner to jest-circus, jasmine is undefined. Following is a minimal, reproducible example:

babel.config.js

module.exports = {
  presets: [["@babel/preset-env", { targets: { node: "current" } }]],
};

jasmine.spec.js

it("check jasmine", () => {
  console.log(jasmine);
});

jest.config.js

module.exports = {
  rootDir: ".",
  testRunner: "jest-circus/runner",
};

package.json

{
  "name": "test-jest",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "test": "jest"
  },
  "author": "",
  "license": "ISC",
  "dependencies": {
    "@babel/core": "^7.12.10",
    "@babel/preset-env": "^7.12.11",
    "babel-jest": "^26.6.3",
    "jest": "^26.6.3",
    "jest-circus": "^26.6.3"
  }
}

运行此测试将导致以下输出:

Running this test will cause following output:

$ npm test

> test-jest@1.0.0 test /Users/yusufaran/Projects/test/test-jest
> jest

 FAIL  ./jasmine.spec.js
  ✕ check jasmine (1 ms)

  ● check jasmine

    ReferenceError: jasmine is not defined

      1 | it("check jasmine", () => {
    > 2 |   console.log(jasmine);
        |               ^
      3 | });
      4 | 

      at Object.<anonymous> (jasmine.spec.js:2:15)

Test Suites: 1 failed, 1 total
Tests:       1 failed, 1 total
Snapshots:   0 total
Time:        1.01 s
Ran all test suites.
npm ERR! Test failed.  See above for more details.

如果您删除/注释jest.config.js中的testRunner行(因此回退到默认运行器)，它将按预期工作.

If you remove/comment the testRunner line in jest.config.js (so it fallbacks to the default runner) it works as expected.

问题

如何在testRunner设置为jest-circus/runner的情况下访问全局jasmine对象?如果不能，为什么?

How can I access global jasmine object with testRunner set to jest-circus/runner? If I can't, why?

推荐答案

使用笑话马戏团时无法访问茉莉花.这是设计使然. jest-circus是从头开始构建的新的测试运行程序.它模仿了定义测试的茉莉花功能(即describe，it，除了expect断言和间谍的所有内容).

You can’t access jasmine when you use jest-circus. This is by design. jest-circus is a new test runner that was built from scratch. It mimics jasmine functionality for defining tests (i.e., describe, it, everything except expect assertions and spies).

如果您依赖茉莉花，请npm install -D jest-jasmine2并在您的jest配置中使用它:

If you depend on jasmine, then npm install -D jest-jasmine2 and use it in your jest config:

{
  testRunner: 'jest-jasmine2'
}

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