[Webkit-unassigned] [Bug 188413] New: Add basic flakiness-analyzer

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=188413

            Bug ID: 188413
           Summary: Add basic flakiness-analyzer
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Tools / Tests
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: jbedard at apple.com
                CC: lforschler at apple.com

This has come in handy enough times over the last 2 months that it's worth committing.

What this script does is read through the stdout of a test run (or runs) and determines which tests were run before some failing test. It then cross-references successful test runs, with the assumption that if a given test preceded a successful run of another test, it is unlikely to be the cause of the failure. We've been able to track down a few flakey test failures using this script, or a predecessor to it.

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