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[RNMobile] Use BlockEdit component when testing component rendering #29569

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merged 4 commits into from
Mar 9, 2021

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@fluiddot fluiddot commented Mar 4, 2021

Description

Fixes #29442.

Add extra logic to some of the native unit tests that renders blocks:

  • Register the block as the editor does
  • Create a function that returns the BlockEdit component that will render the block that we want to test

This way, by rendering the edit components from the BlockEdit component, we add the block edit context that could be required by other components when they're rendered.

In fact, this is the case when the incoming changes from this PR would be merged, the RichText editor component will require the clientID property that is exposed from a new context that is rendered in BlockEdit component.

Caveats

My initial approach was to apply this change to all the native unit tests that render edit components but didn't work.

For example in the File block, one of the tests triggers the onLayout handler. If we render the BlockEdit component, we don't have access to the instance required to trigger that handler so the test fails.

I spent some time on finding an alternative but I didn't find any that fits easily. One option I tried was using the enzyme library but when rendering the component via the mount function, AztecView generates multiple errors. Shallow rendering is not enough because the required handler that we want to trigger is in the children.

Probably the best option would be to integrate a more complete library like @testing-library/react-native, that provides a lot interesting functionality that would make easier to do native unit tests.

How has this been tested?

Test with latest changes from trunk branch

  1. Run npm run native test.
  2. Observe that all unit tests pass.

Test with changes from PR

  1. Checkout branch try/block-context-cleanup from the PR.
  2. Cherry-pick changes from this PR's commit without committing via the command git cherry-pick -n 742eb696556f87707aca0517656d7464ab543bdc.
  3. Run npm run native test.
  4. Observe that all unit tests pass.
  5. Discard changes from the cherry-pick.

Screenshots

N/A

Types of changes

Bug fix

Checklist:

  • My code is tested.
  • My code follows the WordPress code style.
  • My code follows the accessibility standards.
  • I've tested my changes with keyboard and screen readers.
  • My code has proper inline documentation.
  • I've included developer documentation if appropriate.
  • I've updated all React Native files affected by any refactorings/renamings in this PR.

BlockEdit adds the block edit context, which could be required by some parts of an edit component when it's rendered in a unit test.
@fluiddot fluiddot added [Type] Bug An existing feature does not function as intended Mobile App - i.e. Android or iOS Native mobile impl of the block editor. (Note: used in scripts, ping mobile folks to change) labels Mar 4, 2021
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@guarani guarani self-requested a review March 4, 2021 19:05
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I confirmed that this fixes the tests in #29309 🥇 .

@fluiddot
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fluiddot commented Mar 5, 2021

I've just pushed a couple of changes to debug the React Native E2E Tests (iOS) workflow because it's failing all the time 😞 .

@fluiddot
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fluiddot commented Mar 5, 2021

I've just pushed a couple of changes to debug the React Native E2E Tests (iOS) workflow because it's failing all the time 😞 .

Looks like the changes have fixed the workflow so I'm going to make a separate PR for those and then update this one.

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ellatrix commented Mar 5, 2021

Looks like the changes have fixed the workflow so I'm going to make a separate PR for those and then update this one.

Looks good. Can we merge this one and follow up with anything else?

@fluiddot
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fluiddot commented Mar 5, 2021

Looks like the changes have fixed the workflow so I'm going to make a separate PR for those and then update this one.

Looks good. Can we merge this one and follow up with anything else?

I'd rather merge the changes in the e2e tests in another PR I've just created to prevent confusion. Once it's approved I'll merge all of them and then we can update your branch.

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fluiddot commented Mar 5, 2021

@guarani I assigned you as a reviewer of the PR I had to create to fix the e2e tests oft this one. Let me know if you have some time to check it, if not we could find someone else to take a look, thanks 🙇 !

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fluiddot commented Mar 9, 2021

@guarani I assigned you as a reviewer of the PR I had to create to fix the e2e tests oft this one. Let me know if you have some time to check it, if not we could find someone else to take a look, thanks 🙇 !

This was approved in the PR where the e2e tests for iOS were fixed.

@fluiddot fluiddot merged commit fc78dd3 into trunk Mar 9, 2021
@fluiddot fluiddot deleted the rnmobile/fix/unit-tests-render-block-edit branch March 9, 2021 15:02
@github-actions github-actions bot added this to the Gutenberg 10.2 milestone Mar 9, 2021
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Use BlockEdit for block rendering unit tests
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