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[Flight] Basic Integration Test #17307

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merged 8 commits into from Nov 9, 2019
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gaearon
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@gaearon gaearon commented Nov 7, 2019

This adds a basic integration test where we actually feed the model to ReactDOM components and use Suspense. The test verifies that we can stream data and reveal more content as it happens. We also verify errors work.

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sizebot commented Nov 7, 2019

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⚠️ Base commit is broken: 182f64f

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};
}

async function waitForDOMChange(container) {
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This is kinda wonky but I wanted to check for next mutation specifically rather than manually wait for models. Since React itself would wait for models and I want to test it waits correctly.

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Isn’t this what async act is for? Why isn’t it sufficient? It’s supposed to force flush even if it suspends and wait for nested promises.

What’s missing and can we fix that?

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Lol I forgot about it. Let me try it

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sizebot commented Nov 7, 2019

Warnings
⚠️ Base commit is broken: 182f64f

Size changes (experimental)

Generated by 🚫 dangerJS against 5e3e1e7

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gaearon commented Nov 7, 2019

OK this should work. I need two of them to flush Promise ticks for both client and server.

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gaearon commented Nov 7, 2019

ready for another

// We can now show the sidebar.
resolvePhotosModel();
await act(async () => {
jest.runAllTimers();
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There are no timers in any of your test helpers so you don't need these calls.

I would put resolvePhotosModel inside the act call, even though it happens to work without it:

await act(async () => {
  resolvePhotosModel();
});

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The Node server uses setImmediate for scheduling. So I need at least one per server work request I think.

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We probably need a FlgihtServer.act(...) for that but let's run the timers for now.

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gaearon commented Nov 8, 2019

I pushed an update that shims setImmediate which lets us only have the necessary acts. Otherwise we'd still need two for each — because there's timers between Promises, and act can't help with that. Alternatively we could have something like this but I'd rather not.

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gaearon commented Nov 8, 2019

With act in CM, prod experimental build fails (?!)

@gaearon gaearon merged commit be3bfa6 into facebook:master Nov 9, 2019
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5 participants