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?
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'
}
Just adding testRunner: 'jasmine2' to jest.config.js did the trick for me