Jest fails with 'self is not defined' when importing react-diagrams

Question

Im trying to create a basic jest test interacting with a npm dependency: react-diagrams

The failing test

import { DiagramModel } from '@projectstorm/react-diagrams'

test('importing react diagrams', () => {
    let x = DiagramModel
});

Simply referencing the DiagramModel class causes this error:

    ReferenceError: self is not defined

    > 1 | import { DiagramModel } from '@projectstorm/react-diagrams'
        | ^
      2 |
      3 | test('importing react diagrams', () => {
      4 |     let x = DiagramModel

      at Object.<anonymous> (node_modules/@projectstorm/react-diagrams/dist/index.umd.js:1:331)
      at Object.<anonymous> (tests/DiagramModel.test.ts:1:1)

Other tests works fine, and the dependency works fine when bundeled elsewhere.

jest.config.js

module.exports = {
  preset: 'ts-jest',
  testEnvironment: 'node',
};

package.json

"jest": "^26.6.3",
"ts-jest": "^26.5.2",
...

Any ideas what I can do to remedy this?

Reproducing

Added test + configuration in a codesandbox (but could not get the test runner to pick it up). The full repo

Querist

#64640339 – Blunderbuss

You will need to provide a reproductible example because as you can see on this codesandbox there is no such problem at all. – Stridulate

Answer 1

After some tests it finally works with this configuration :

jest.config.js

module.exports = {
  preset: 'ts-jest',
  testEnvironment: 'jsdom',
};

package.json :

{
  "name": "jest-test",
  "version": "1.0.0",
  "main": "index.js",
  "license": "MIT",
  "devDependencies": {
    "jest": "^26.6.3",
    "ts-jest": "^26.5.2"
  },
  "scripts": {
    "test": "jest"
  },
  "dependencies": {
    "@emotion/react": "^11.1.5",
    "@emotion/styled": "^11.3.0",
    "@projectstorm/react-canvas-core": "^6.5.2",
    "@projectstorm/react-diagrams": "^6.5.2",
    "@projectstorm/react-diagrams-routing": "^6.5.2",
    "closest": "^0.0.1",
    "dagre": "^0.8.5",
    "pathfinding": "^0.4.18",
    "paths-js": "^0.4.11",
    "react": "^17.0.2",
    "resize-observer-polyfill": "^1.5.1"
  }
}

You were missing the fact that @projectstorm/react-diagrams is a react library and it needs dom environment not nodejs.

Riptide

I updated my answer to test if it's related to Jest testEnvironment, let me know if it works ! – Riptide

Lifesaver! I can award bounty in 24 hours :) – Querist

Answer 2

Thanks for the hint about changing the testEnvironment to jsdom. Initially, this didn't work for me. However, I noticed some test files had the directive @jest-environment node at the top. After changing this to @jest-environment jsdom, the tests worked as expected.

If you're facing a similar issue, check if this directive is in your test files and update it accordingly.

/**
 * @jest-environment node -> @jest-environment jsdom
 */

Pallbearer