eslint throws `no-undef` errors when linting Jest test files

Question

I'm using Jest to write some specs and ESLint to lint the styling.

For my foo.spec.js tests, eslint keeps throwing the following errors. It seems to think that jest, beforeEach, afterEach, etc... are not defined in that file.

   11:1   error  'beforeEach' is not defined  no-undef    12:3   error  'jest' is not defined        no-undef    14:13  error  'jest' is not defined        no-undef    18:1   error  'afterEach' is not defined   no-undef    20:1   error  'describe' is not defined    no-undef    21:3   error  'it' is not defined          no-undef    25:5   error  'expect' is not defined      no-undef    28:5   error  'expect' is not defined      no-undef    31:5   error  'expect' is not defined      no-undef    34:3   error  'it' is not defined          no-undef    38:5   error  'expect' is not defined      no-undef    41:5   error  'jest' is not defined        no-undef    42:5   error  'expect' is not defined      no-undef    43:5   error  'expect' is not defined      no-undef    46:3   error  'it' is not defined          no-undef    54:5   error  'expect' is not defined      no-undef    58:5   error  'jest' is not defined        no-undef 

I believe those are included by jest automatically and so they don't need to be explicitly imported in my spec files. In fact the only thing I import via my jest.setup.js file is

import "react-testing-library/cleanup-after-each"; import "jest-dom/extend-expect"; 

Is there a way to eliminate these errors without having to disable eslint rules at the top of each individual file or inline?

Thanks!

Answer 1

Please, add the following to your .eslintrc file:

{   "overrides": [     {       "files": [         "**/*.spec.js",         "**/*.spec.jsx"       ],       "env": {         "jest": true       }     }   ] }