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Fix flaky test by finalising request resolution in Nav block e2e test #39633

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merged 2 commits into from
Mar 28, 2022

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getdave
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@getdave getdave commented Mar 22, 2022

What?

Fixes to the e2e tests to resolve #39231.

Closes #39231.

Why?

This e2e test keeps failing #39231 because the resolution function maybe be null and not callable.

How?

Conditionalises the calling of the resolution function to check whether it is a function.

Testing Instructions

Screenshots or screencast

@getdave getdave added [Type] Code Quality Issues or PRs that relate to code quality [Block] Navigation Affects the Navigation Block [Package] E2E Tests /packages/e2e-tests labels Mar 22, 2022
@getdave getdave self-assigned this Mar 22, 2022
@getdave getdave changed the title Conditionalise resolution function Conditionalise request resolution function in Nav block e2e test Mar 22, 2022
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Total Size: 1.21 MB

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getdave commented Mar 22, 2022

@talldan I wonder if your expert knowledge of e2e tests can shed any light on this.

It passes locally but is flaky on CI.

When the block is added with the ref of 1 a request should made to the endpoint /wp-json/wp/v2/navigation/2?context=edit&_locale=user. However the request match obviously doesn't always work and thus the resolveNavigationRequest var is not always a function.

The question is why does the request sometimes not match?

@getdave getdave marked this pull request as ready for review March 22, 2022 10:44
@getdave getdave requested a review from talldan March 22, 2022 10:44
@getdave getdave marked this pull request as draft March 22, 2022 13:43
@getdave getdave marked this pull request as ready for review March 22, 2022 13:43
@getdave getdave force-pushed the try/fix-shows-loading-indicator-flaky-test branch from cd58c9d to 8f3de45 Compare March 22, 2022 13:44
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talldan commented Mar 23, 2022

@getdave I don't know for sure. I'd recommend having a look through the docs for request interception and then taking a look at how setUpResponseMocking works:
https://github.com/puppeteer/puppeteer/blob/main/docs/api.md#pagesetrequestinterceptionvalue

I wonder if there's an issue in that this code never calls request.respond or request.continue. The docs seem to mention that's an important part of handling requests. I think it should call request.continue when it's ready to resolve. Usually createJSONResponse handles that implementation detail (but using request.respond to change the response).

Having said that, I don't know that the request technically needs to resolve. The promise code might not be necessary at all. The tests don't do anything after the promise resolves, so maybe the easiest option is to not resolve.

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getdave commented Mar 23, 2022

Having said that, I don't know that the request technically needs to resolve. The promise code might not be necessary at all. The tests don't do anything after the promise resolves, so maybe the easiest option is to not resolve.

I guess I didn't want to risk having a unfulfilled Promise hanging around.

@getdave getdave changed the title Conditionalise request resolution function in Nav block e2e test Fix flaky test by finalising request resolution in Nav block e2e test Mar 24, 2022
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getdave commented Mar 24, 2022

@talldan I took a more careful look at createJSONResponse and setUpResponseMocking and as a result I've tried calling request.continue() when the Promise is resolved. Let's see how that pans out.

@getdave getdave requested a review from draganescu March 24, 2022 16:39
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getdave commented Mar 24, 2022

Github Actions are down now so I'll have to wait until tomorrow to see if this works on CI. Oh the suspense!

@getdave getdave force-pushed the try/fix-shows-loading-indicator-flaky-test branch from 0d97f3b to a624392 Compare March 25, 2022 09:19
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getdave commented Mar 28, 2022

I'm going to re-run these tests several times to see if they are still flaky.

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getdave commented Mar 28, 2022

Ok this passed 5 times without issue. Going to merge and 🙏 that fixes it.

@getdave getdave merged commit 081640b into trunk Mar 28, 2022
@getdave getdave deleted the try/fix-shows-loading-indicator-flaky-test branch March 28, 2022 12:51
@github-actions github-actions bot added this to the Gutenberg 13.0 milestone Mar 28, 2022
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[Flaky Test] shows a loading indicator whilst ref resolves to Navigation post items
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