Bug 118293 – [webkitpy] Add run-tests-touched-by-attachment command

• Component: Tools / Tests
• Status: RESOLVED WONTFIX

[Csaba Osztrogonác]

We need a new run-tests-touched-by-attachment command for webkit-patch.

It should download the given attachment from bugzilla, apply the patch,
build with the patch, determine which tests or expected files are touched
by the attachment on any platform, run only these tests.

It will be necessary for the rebaseline helper tools.
See https://bugs.webkit.org/show_bug.cgi?id=117831 for details.

[János Badics]

Created attachment 205907 [details]
WIP patch

The tool can be run by
'Tools/Scripts/webkit-patch run-tests-touched-by-attachment [ATTACHMENT_ID]'

At the current state, the tool gets the paths of modified expected txt/png files. Then it determines the filename without the '-expected' suffix and the file extension. _test_relative_dir() determines the relative generic directory path for the given test, e.g.
LayoutTests/platform/qt-5.0-wk1/editing/deleting/delete-cell-contents-expected.txt ->
editing/deleting/
Then _tests_in_dir gets the paths of all the tests found in this directory. As a last step, the loop in _first_generic_by_filename() gets the first match to the given file name.
I know it's a bit ineffective, but we have to look up the extension for the given test file name, since a lot of extensions are supported for test files (htm, html, xhtml, etc.).

Further modifications are also needed, especially the ones recommended by Ryosuke Niwa at https://bugs.webkit.org/show_bug.cgi?id=117831

[Csaba Osztrogonác]

no interest in it anymore