Support lifecycle methods

[albertfdp]

Hi!

I have some piece of code I'd like to test, however it's on componentWillReceiveProps. Currently, there doesn't seem to be a way to test this using unexpected-react.

A solution is to re-render the same component on the same DOM node, which React will re-render instead of remount. Example

I think adding this assertion could probably do the job:
<RenderedReactElement> when receiving new props <object> <assertion>

What do you think? Thanks!

[bruderstein]

There are patterns to do this with unexpected-react now. You can render the component yourself (without using `when [deeply] rendered`), then render the component again as you said with new props. Then use the renderer or component instance in the assertion. ```js const renderer = TestUtils.createRenderer() renderer.render(<MyComponent prop="first" />) renderer.render(<MyComponent prop="second" />) expect(renderer, 'to have rendered', ...) ``` We can try and add this new assertion, as I think it would be quite useful as it means you can use the `when rendered` and similar assertions, but just wanted to point out it can be done :)

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On Tue, 1 Aug 2017, 22:50 Albert Fernández, ***@***.***> wrote: Hi! I have some piece of code I'd like to test, however it's on componentWillReceiveProps. Currently, there doesn't seem to be a way to test this using unexpected-react. A solution is to re-render the same component on the same DOM node, which React will re-render instead of remount. Example <https://stackoverflow.com/a/30616091/1794589> I think adding this assertion could probably do the job: <RenderedReactElement> when receiving new props <object> <assertion> What do you think? Thanks! — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub <#46>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AAFmRGO7xy0z4jpU7xafKkGivP3exjOPks5sT4-ggaJpZM4OqRsz> .

[albertfdp]

Nice, I didn't know it was as easy. The example I pointed was a lot more boilerplate.

I think it would be quite useful to add, testing these re-render lifecycles should have first-level support. Happy to add to do a PR for this if you can point me a bit on where to start.

Thanks!