stryker-js: Cannot find module 'setupDevtools' from 'setup.js'

@mickaelw It’s an issue with type in your dependencies. You ask for types/react 16.7.3 but enzyme is still using types/react 16.4.13 in you yarn.lock.

I made a PR, it’s not the best fix but it’s enough. https://github.com/mickaelw/test-stryker/pull/1

@nicojs In this PR, yarn test works for me, but not yarn stryker

I’ve been able to reproduce the error without Stryker, just plain jest + react-native. I’ve opened up an issue at react-native. Hopefully there is a solution. https://github.com/facebook/react-native/issues/22823

I will try to figure out what’s wrong before this year is done. Thanks for your patience

@simondel Thanks for the time you takes

I don’t really know and can’t explain why we need babel. We are starting using typescript on our project and still having some js files. For example, index.js, setupTest.js, …, and running yarn test:unit without babel will return

/home/vincentl/Perso/StrykerTest/jest/setupTests.js:1
    ({"Object.<anonymous>":function(module,exports,require,__dirname,__filename,global,jest){import Enzyme from 'enzyme';
                                                                                             ^^^^^^
    
    SyntaxError: Unexpected token import

How did you remove babel from the project ?

And I’m not sure because I could only try tomorrow, but I think my real react-native project won’t correctly run and build on IOS and Android without babel. For information, we’re using this package. I’ll check tomorrow.

But I’m surprised the provided repository does not produce error about setupDevtools on your computer. I tried on Mac / Node 9.5 and Linux / Node 8.4 and I got it every time.

I need to comment the  node_modules/react-native/jest/setup.js from line 29 to the EOF to get the error you had

Couldn't find preset "es2015" relative to directory "/home/vincentl/Perso/StrykerTest/node_modules/request/node_modules/hawk"

In this case, if I remove setupTestFrameworkScriptFile from the jest config and use the test

expect(true).toBe(true);

It works !!!

But then, I removed

transpilers: ['typescript', 'babel'],
tsconfigFile: 'tsconfig.json',
babelrcFile: '.babelrc',

Still works ! Why ? It makes me confused.

Ok, if I go back and look at the preset error. I found out the issue came from the following lines of setupTest.js

const mockDocumentForEnzymeMount = () => {
  const jsdom = require('jsdom');

  const { JSDOM } = jsdom;

  const { document } = new JSDOM('').window;
  global.document = document;
};
mockDocumentForEnzymeMount();

But then, if i run yarn add babel-preset-es2015, I have the error

/home/vincentl/Perso/StrykerTest/node_modules/jsdom/lib/jsdom/living/xmlhttprequest.js: missing super() call in constructor
         95 | 
         96 |   class XMLHttpRequest extends XMLHttpRequestEventTarget.interface {
      >  97 |     constructor() { // eslint-disable-line constructor-super
            |     ^
         98 |       const theThis = Object.create(new.target.prototype);
         99 |       XMLHttpRequestEventTarget.setup(theThis);
        100 |       theThis.upload = XMLHttpRequestUpload.create();

I found this issue and try quickly yarn add jsdom@11.1.0 and now I have the error

Button should render the button
		Error: Cannot find module 'Text' from 'react-native-implementation.js'
    at Resolver.resolveModule (/home/vincentl/Perso/StrykerTest/node_modules/jest-resolve/build/index.js:169:17)

I’ll will keep investiguate tomorrow or this week-end.

But I don’t think that is a solution for me cause during this time, yarn test:unit does not work with the error

Invariant Violation: __fbBatchedBridgeConfig is not set, cannot invoke native modules

And if I don’t comment the  node_modules/react-native/jest/setup.js from line 29 to the EOF, tests pass but Stryker ask me for setupDevtools…

@simondel I made this for you.

git clone git@github.com:VincentLanglet/StrykerTest.git
cd StrykerTest
yarn

Jest works

yarn test:unit 

Stryker does not

yarn stryker