How test with Jest?

[darkowic]

I'm trying to setup Jest tests configuration for my project. I use imports-loader to load some old jQuery libs

import 'imports-loader!jquery-mousewheel'

When running tests with jest I get following error:

 Cannot find module 'imports-loader!jquery-mousewheel' from 'SomeModule.js'

As a workaround, I mock all imports-loader in Jest config

"moduleNameMapper": {
  "imports-loader?.*": "<rootDir>/internals/mocks/importsLoader.js"
},

// importsLoader.js
module.exports = 'IMPORTS_LOADER_MOCK';

How to configure it to actually import correct module?

[thedv91]

I have same issue. You solved it?

[darkowic]

Unfortunately no @chacbumbum

[maxcodes]

Bump. Stuck with the same issue

[nickangtc]

Thanks @darkowic I needed just a solution to mock all the require('imports!...') blocks, your moduleNameMapper solution worked for me 👍

[am]

Facing the same issue but with expose-loader.

[technoligest]

Anyone had any luck with this? @darkowic I do not completely understand your approach, can you please elaborate?

[darkowic]

The workaround simply imports string instead of the real module

[alexander-akait]

Here a lot of examples - https://jestjs.io/docs/en/webpack, if somebody still have problems, please open an issue in jest