Adding new SSR tests for context, refs, and reviving markup. #9257
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sophiebits
approved these changes
Mar 26, 2017
| it('can distinguish an empty component from an empty text component', () => | ||
| expectMarkupMismatch(<div><EmptyComponent /></div>, <div>{''}</div>)); | ||
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| it('should reconnect if component trees differ but resulting markup is the same', () => { |
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Is this different from, ex: the ES6 vs Pure test above?
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Good question! I could argue that it's a little different, in that it's comparing two different React.Component class implementations against each other, which wasn't done above, but yeah, it's probably duplicative and has a very low (maybe zero?) likelihood of catching something not caught by those tests. I can take it out in the next PR.
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This is a latest chapter in a series of PRs adding server-side rendering unit tests (following on #9055, #9089, #9106, and #9221).
This PR adds SSR tests for context, refs, and markup mismatch warnings when reviving.
If we end up implementing the new SSR as a Fiber renderer, then the context tests are probably not needed, as I'm guessing that Fiber handles context by itself and is well tested. If we write SSR from scratch, though, those tests will be useful.
Also, while I found all these tests useful when I wrote my custom server renderer, I totally understand if you find them repetitive, especially the ones that repeat tests for both class components and stateless components. Just let me know what you think!