Accessing jasmine with testRunner set to jest-circus results in: ReferenceError: jasmine is not defined

问题

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"
  }
}

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.

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

Question

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

回答1:

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).

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

{
  testRunner: 'jest-jasmine2'
}

来源：https://stackoverflow.com/questions/65889205/accessing-jasmine-with-testrunner-set-to-jest-circus-results-in-referenceerror

标签

javascript

node.js

jestjs

jasmine

jest-circus