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Improve flaky draft creation navigation block e2e test #37931

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merged 4 commits into from
Jan 13, 2022

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talldan
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@talldan talldan commented Jan 13, 2022

Description

Fixes #37479.

I don't really understand the error message output by this test:

expect(jest.fn()).toHaveErroredWith(expected)

    Expected mock function to be called with:
    ["Failed to load resource: the server responded with a status of 404 (Not Found)"]
    but it was called with:

It seems to indicate that the console mock function is still called, but it has no message. It's unusual, but if this is the case the test can probably use expect( console ).toHaveErrored() instead of expect( console ).toHaveErroredWith().

@talldan talldan added the [Type] Automated Testing Testing infrastructure changes impacting the execution of end-to-end (E2E) and/or unit tests. label Jan 13, 2022
@talldan talldan self-assigned this Jan 13, 2022
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@talldan talldan changed the title Be less specific about the kind of error Improve flaky draft creation navigation block e2e test Jan 13, 2022
expect( console ).toHaveErroredWith(
'Failed to load resource: the server responded with a status of 404 (Not Found)'
);
expect( console ).toHaveErrored();
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Or if we want to be extra clear about the error we're expecting we could do a substring match. Probably not worth it though. toHaveErrored is probably good enough.

Suggested change
expect( console ).toHaveErrored();
expect( console ).toHaveErroredWith(
expect.stringContaining( 'Failed to load resource'
));

@getdave
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getdave commented Jan 13, 2022

@talldan Looking at the failure artifacts it seems that the url-details endpoint may have been able to fetch the rich previews data about the draft.

allows pages to be created from the navigation block and their links added to menu 2022-01-13T05-47-

Otherwise why would the preview exist? That would likely mean the endpoint didn't return 404 and thus your test will fail.

Why that happens is another question...

Testing this flow manually the rich preview response is a 404:

Screen Shot 2022-01-13 at 06 35 12

@talldan
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talldan commented Jan 13, 2022

Looking at the failure artifacts it seems that the url-details endpoint may have been able to fetch the rich previews data about the draft. Otherwise why would the preview exist?

I think it has to be returning a 404, otherwise the test would fail earlier at the waitForResponse line instead of the expect( console ) line.

The inconsistency seems to be in the console logging. It might be that there's sometimes a small delay in console logging. I wonder if moving this expect to the end of the test would improve things.

@talldan
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talldan commented Jan 13, 2022

I discovered some issues with the deleteAll function:

  • It was only deleting 10 items at a time. The GET request needed per_page=-1
  • It wasn't deleting the drafts this test creates. The GET request needed status=draft.

I've also moved the expect( console ).toHaveLoggedWith call to the end of the test to see if that makes it any better.

@getdave
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getdave commented Jan 13, 2022

Re-running the tests to make sure it's not flaky!

  • Test Run 1
  • Test Run 2
  • Test Run 3

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This looks to have solved the problem. Let's 🤞 🤞 🤞 🤞 🤞 there are no other weird quirks to this one.

Thanks again @talldan for persisting and finding a good solution.

@getdave getdave merged commit cef5825 into trunk Jan 13, 2022
@getdave getdave deleted the improve/flaky-navigation-block-test branch January 13, 2022 14:33
@github-actions github-actions bot added this to the Gutenberg 12.5 milestone Jan 13, 2022
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[Flaky Test] allows pages to be created from the navigation block and their links added to menu
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