Using jest in my react app, describe is not defined

Question

I am new to jest and trying to figure out some basic stuff in my following code

import * as actions from './IncrementalSearchActions';

describe('Incremental Search Actions', () => {
    it('Should create an incremental search action')
});

The questions/confusions I have around this are

I get an error saying describe is not defined, how do I import the reuqired module?
Is this supposed to be used with Karma/Jasmine?

How do you run the test? There is no need to import `describe` — CodinCat, Jun 18 '17 at 03:51
For 2. Jest doesn't need to be used with karma or jasmine, jest itself is something like a all-in-one solution — CodinCat, Jun 18 '17 at 03:52
How do Import the 'describe' function in ES6, this is my main confusion, do I need to import something in jest? — tmp dev, Jun 18 '17 at 05:55
if I dont need to import anything where does the describe function come from? — tmp dev, Jun 18 '17 at 22:13
ok, I found the explanation here https://facebook.github.io/jest/docs/api.html, but if I am not importing anything at all how do it add anything to globals? — tmp dev, Jun 18 '17 at 22:28
Are you getting this error when running the jest command, or from ESLint? — Zach, Jun 18 '17 at 22:30

score 245 · Answer 1 · answered Aug 24 '17 at 15:35

245

I believe the answer here is the answer to your question.

TL;DR;:

add the following to your .eslintrc file:

"env": {
    "jest": true
}

answered Aug 24 '17 at 15:35

SunshinyDoyle

3,441
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You can find all the configuration details for other unit test libraries @ [ESLint Specifying Environments](https://eslint.org/docs/user-guide/configuring#specifying-environments) – greemwahr Mar 16 '18 at 11:45

score -3 · Answer 2 · answered Aug 17 '17 at 08:39

-3

Are your test files under a the "test" folder? make sure jest is install properly and listed on your package.json and under scripts have:

"test": "jest --coverage",

you can run the script with npm test

answered Aug 17 '17 at 08:39

Julito Sanchis

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Using jest in my react app, describe is not defined

2 Answers2

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