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@fabioh8010 fabioh8010 commented Jun 24, 2025

Details

This PR attempts to reduce the flakiness on CI:

  • Changes the CI workflow to use the same runner we have for Reassure in E/App, and to output the Reassure results as an artefact so they can be used for data inspection when needed.
  • Implements the clearOnyxUtilsInternals function to clean up some leftovers we have in OnyxUtils when running Reassure tests in that file.
  • Implements a TestSequencer in Jest to make all the unit tests always run ordered by their path, reducing flakiness on Reassure.

I tested locally a couple of times and the results looks promising, I ran stability tests multiple times (basically doing baseline and delta tests with the same PR) and there were no crazy regressions anymore. Unfortunately we will still have regressions reported here because the baseline is main and the we don't have the improvements there.

@mountiny Do you think we can try merging this PR to see if the next ones will continue to have big flakiness?

Related Issues

Expensify/App#64813

Automated Tests

N/A

Manual Tests

N/A

Author Checklist

  • I linked the correct issue in the ### Related Issues section above
  • I wrote clear testing steps that cover the changes made in this PR
    • I added steps for local testing in the Tests section
    • I tested this PR with a High Traffic account against the staging or production API to ensure there are no regressions (e.g. long loading states that impact usability).
  • I included screenshots or videos for tests on all platforms
  • I ran the tests on all platforms & verified they passed on:
    • Android / native
    • Android / Chrome
    • iOS / native
    • iOS / Safari
    • MacOS / Chrome / Safari
    • MacOS / Desktop
  • I verified there are no console errors (if there's a console error not related to the PR, report it or open an issue for it to be fixed)
  • I followed proper code patterns (see Reviewing the code)
    • I verified that any callback methods that were added or modified are named for what the method does and never what callback they handle (i.e. toggleReport and not onIconClick)
    • I verified that the left part of a conditional rendering a React component is a boolean and NOT a string, e.g. myBool && <MyComponent />.
    • I verified that comments were added to code that is not self explanatory
    • I verified that any new or modified comments were clear, correct English, and explained "why" the code was doing something instead of only explaining "what" the code was doing.
    • I verified proper file naming conventions were followed for any new files or renamed files. All non-platform specific files are named after what they export and are not named "index.js". All platform-specific files are named for the platform the code supports as outlined in the README.
    • I verified the JSDocs style guidelines (in STYLE.md) were followed
  • If a new code pattern is added I verified it was agreed to be used by multiple Expensify engineers
  • I followed the guidelines as stated in the Review Guidelines
  • I tested other components that can be impacted by my changes (i.e. if the PR modifies a shared library or component like Avatar, I verified the components using Avatar are working as expected)
  • I verified all code is DRY (the PR doesn't include any logic written more than once, with the exception of tests)
  • I verified any variables that can be defined as constants (ie. in CONST.js or at the top of the file that uses the constant) are defined as such
  • I verified that if a function's arguments changed that all usages have also been updated correctly
  • If a new component is created I verified that:
    • A similar component doesn't exist in the codebase
    • All props are defined accurately and each prop has a /** comment above it */
    • The file is named correctly
    • The component has a clear name that is non-ambiguous and the purpose of the component can be inferred from the name alone
    • The only data being stored in the state is data necessary for rendering and nothing else
    • If we are not using the full Onyx data that we loaded, I've added the proper selector in order to ensure the component only re-renders when the data it is using changes
    • For Class Components, any internal methods passed to components event handlers are bound to this properly so there are no scoping issues (i.e. for onClick={this.submit} the method this.submit should be bound to this in the constructor)
    • Any internal methods bound to this are necessary to be bound (i.e. avoid this.submit = this.submit.bind(this); if this.submit is never passed to a component event handler like onClick)
    • All JSX used for rendering exists in the render method
    • The component has the minimum amount of code necessary for its purpose, and it is broken down into smaller components in order to separate concerns and functions
  • If any new file was added I verified that:
    • The file has a description of what it does and/or why is needed at the top of the file if the code is not self explanatory
  • If the PR modifies a generic component, I tested and verified that those changes do not break usages of that component in the rest of the App (i.e. if a shared library or component like Avatar is modified, I verified that Avatar is working as expected in all cases)
  • If the main branch was merged into this PR after a review, I tested again and verified the outcome was still expected according to the Test steps.
  • I have checked off every checkbox in the PR author checklist, including those that don't apply to this PR.

Screenshots/Videos

Android: Native
Android: mWeb Chrome
iOS: Native
iOS: mWeb Safari
MacOS: Chrome / Safari
MacOS: Desktop

Test change 1

Test with clearInternals

Skipping OnyxUtils

Test change 2

Test change 3

Cleanup

Skip useOnyx instead

Revert skip

Upload Reassure results

Include hidden files in upload step

Test change

Test change 2

Use ubuntu-24.04-v4 image

Test change 3

Do all Reassure steps in one workflow step

Test change 4

Test change 5

Test change 6

Test change 7

Reintroduce clearOnyxUtilsInternals

Minor adjustments

Test change

Add test sequencer

Cleanup

Cleanup
@fabioh8010 fabioh8010 force-pushed the bugfix/reassure-flakiness branch from 7968eaf to d43972e Compare June 30, 2025 14:30
@fabioh8010 fabioh8010 changed the title Investigating Reassure flakiness [NoQA] Investigating Reassure flakiness Jun 30, 2025
@fabioh8010 fabioh8010 marked this pull request as ready for review June 30, 2025 15:03
@fabioh8010 fabioh8010 requested a review from a team as a code owner June 30, 2025 15:03
@melvin-bot melvin-bot bot requested review from puneetlath and removed request for a team June 30, 2025 15:03
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Thank you, moving this ahead as the flaky tests across onyx prs are distraction

@mountiny mountiny merged commit e1744b0 into Expensify:main Jun 30, 2025
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os-botify bot commented Jun 30, 2025

🚀 Published to npm in 2.0.114 🎉

@mountiny
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Checking to test on this PR #647

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2 participants