Bug 224289 – results.webkit.org should provide API for EWS to check flakiness of tests

• Component: Tools / Tests
• Status: ASSIGNED

[Aakash Jain]

results.webkit.org should provide a REST API for EWS to check if the test is passing, consistently failing or flaky.

API should accept these parameters: test name(s), commit identifier, test-suite (layout-tests, api-tests etc,), platform (macos, iOS etc.), configuration (debug, release etc.) and any other necessary parameter.
API should return whether the test is consistently passing, consistently failing, flaky etc.

[Aakash Jain]

This might need discussion about the specifics of the API we might need for EWS, specifically for flakiness information. I think we can tackle the problem in two parts: API for dealing with flaky failures in EWS, API for dealing with consistent failures in EWS.

For consistent failures, I filed two specific API requests in Bug 224434 and Bug 224435.

[Jonathan Bedard]

I think the way that this API should work is that is should provide a "percent likelihood" for each outcome of a given test with a given configuration at a given commit. We will need to toy with the algorithm a bit to figure out what the appropriate way to rank commits surrounding the commit in question is, I'm envisioning a result that looks something like this:

{
    "PASS": 80,
    "FAIL": 10,
    "TIMEOUT": 5,
    "CRASH": 5
}

Meaning that given the configuration that the user provided, we would expect that the given test passes 80% of the time, fails 10% of the time, timeout 5% of the time and crashes 5% of the time. From that point, EWS can decide if the pass percentage is high enough to justify failing the build.

[Radar WebKit Bug Importer]

<rdar://problem/76651206>

[Chris Gambrell]

Created attachment 429332 [details]
Current mock-up of script