Drop dependency on React's Simulate module

[kentcdodds]

This code has got to go:

https://github.com/kentcdodds/react-testing-library/blob/fe3b65ca158f0ac088b67b195b678a9428a7a2b5/src/index.js#L62-L68

I'm not sure what is needed, but I suggest that we methodically remove one element from that array, see what breaks, then add some code until it starts working.

It may mean that we continue to monkey-patch fireEvent to support React events properly (because React is a little special). All I really care about is getting rid of the Simulate module. The biggest reason is #129, but also Dan told me we shouldn't use it and it's hacky and I want to get rid of it :)

[weyert]

When you say doesn't work in the DOM you are referring to jsdom correct? As far as I know the mouse enter and mouse leave events exists as they are mentioned on MDN. The JSDOM does define the MouseEvent at: https://github.com/jsdom/jsdom/blob/13b2326b57ec621c4b75a64966ea23d89d8fce99/lib/jsdom/living/events/MouseEvent-impl.js

[kentcdodds]

I think that comment is referring to the fact that they don't work in the same way the DOM works. This is because React treats those events differently.

If you remove them from the array, you'll notice that tests start to break. Try to fix the tests without changing the tests. That's the task at hand :)

The change event used to be in this array, but I was able to remove it by making changes to dom-testing-library to allow people to set the value when they use fireEvent in a way that's not detectable by React: testing-library/dom-testing-library#85

[weyert]

I have been looking into this for a bit I found potentially relevant or interesting unit tests in the React repository:

https://github.com/facebook/react/blob/b87aabdfe1b7461e7331abb3601d9e6bb27544bc/packages/react-dom/src/events/__tests__/EnterLeaveEventPlugin-test.js
and
https://github.com/facebook/react/blob/b87aabdfe1b7461e7331abb3601d9e6bb27544bc/packages/react-dom/src/events/__tests__/SelectEventPlugin-test.js

[kentcdodds]

@sivkoff fixed this! Thank you Vitaly!

[vitalyso]

@kentcdodds you're always welcome!