jest snapshot tests are failing with invariant Violation

[bseber]

recently I've replaced mocha with jest and I love the snapshot testing feature. Unfortunately this does not work for components using the react-list. The tests are failing with an invariant violation:

Invariant Violation: getNodeFromInstance: Invalid argument.

      at invariant (node_modules/fbjs/lib/invariant.js:44:15)
      at Object.getNodeFromInstance (node_modules/react-dom/lib/ReactDOMComponentTree.js:162:77)
      at findDOMNode (node_modules/react-dom/lib/findDOMNode.js:49:41)
      at ReactList.getScrollParent (node_modules/react-list/react-list.js:191:18)
      at ReactList.updateScrollParent (node_modules/react-list/react-list.js:325:34)
      at ReactList.updateFrame (node_modules/react-list/react-list.js:310:14)
      at ReactList.componentDidMount (node_modules/react-list/react-list.js:149:14)
      at node_modules/react-test-renderer/lib/ReactCompositeComponent.js:265:25
      at measureLifeCyclePerf (node_modules/react-test-renderer/lib/ReactCompositeComponent.js:75:12)
      at node_modules/react-test-renderer/lib/ReactCompositeComponent.js:264:11

Googling for this I found some react issues regarding react-test-renderer and react-dom imported by 3rd party libs. Now I am just mocking the react-list in the tests:

// __mocks__/react-list.js
import React from 'react';

const ref = () => {};

export default function ReactListMock ({
    items,
    itemsRenderer,
    itemRenderer,
}) {
    const itemElements = items.map ((item, index) => itemRenderer (index, index));
    return itemsRenderer (itemElements, ref);
}

Does anyone have another solution?
Or even know whats going wrong in react internals?

Shall we add this to the FAQ section in the readme?

[maullerz]

Just got similar error in rollbar

Invariant Violation: Minified React error #44; visit http://facebook.github.io/react/docs/error-decoder.html?invariant=44 for the full message or use the non-minified dev environment for full errors and additional helpful warnings.
  File "webpack:///../~/react-dom/lib/reactProdInvariant.js", line 31, in n
      var error = new Error(message);
  File "webpack:///../~/react-dom/lib/findDOMNode.js", line 53, in r
        !false ? process.env.NODE_ENV !== 'production' ? invariant(false, 'findDOMNode was called on ...
  File "webpack:///../~/react-list/react-list.js", line 218, in value
            var el = findDOMNode(this);
  File "webpack:///../~/react-list/react-list.js", line 352, in value
            this.scrollParent = this.getScrollParent();
  File "webpack:///../~/react-list/react-list.js", line 337, in value
            this.updateScrollParent();
  File "[native code]", line unknown, in value

the link contains

findDOMNode was called on an unmounted component.

[kachaj7]

I get similar error with jest.

TypeError: Cannot read property 'styleSheets' of undefined
      at Window.getComputedStyle (node_modules/jsdom/lib/jsdom/browser/Window.js:405:36)
      at ReactList.getScrollParent (node_modules/react-list/bin/react-list.js:170:24)
      at ReactList.updateScrollParent (node_modules/react-list/bin/react-list.js:301:32)
      at ReactList.updateFrame (node_modules/react-list/bin/react-list.js:286:12)
      at ReactList.componentDidMount (node_modules/react-list/bin/react-list.js:109:12)
      at node_modules/react-test-renderer/lib/ReactCompositeComponent.js:264:25
      at measureLifeCyclePerf (node_modules/react-test-renderer/lib/ReactCompositeComponent.js:75:12)
      at node_modules/react-test-renderer/lib/ReactCompositeComponent.js:263:11
      at CallbackQueue.notifyAll (node_modules/react-test-renderer/lib/CallbackQueue.js:76:22)
      at ReactTestReconcileTransaction.close (node_modules/react-test-renderer/lib/ReactTestReconcileTransaction.js:36:26)```

[bseber]

intentional beahviour by react-test-renderer

@see facebook/react#7371 (comment)

I will update the FAQ and do a pull request as soon as I can spare some time