Fix the code coverage reporting

[jrf]

As reported by Juliette on #51734:

---

So... this broke the code coverage reporting as it seems it was forgotten to update the code coverage configuration in the phpunit.xml.dist file.

Last commit on which code coverage was run is commit [50436]
See: ​https://app.codecov.io/gh/WordPress/wordpress-develop/

It can also been seen in the GH Actions code coverage runs which report:

==> Reading reports
    - file not found at wp-code-coverage-single-clover-cded2eb52aa71a398d1d0cd87f8674b383512c0b.xml
--> No coverage data found.

I'll upload the patch which should fix this in a moment and which basically reverts [48847].
Note: this patch will also need to be backported.

I'll also upload a second patch (optional) which would (should) allow for manually triggering code coverage runs. Committing that patch would allow us, in the future, to test that specific build changes do not break the code coverage build by manually triggering a build on a branch/PR.

[desrosj]

I copied the original patches over from #51734 to have them in one place.

52786.diff​ is an expanded version of 52786-allow-manual-triggering-codecov-workflow.patch​ that will trigger a build when the phpunit.xml.dist file is updated. Since this file configures how the test suite runs and how code coverage reports are compiled, it makes sense to run the workflow every time this is updated.

CC @johnbillion.

[jrf]

Own ticket ? Okay, fair enough.

In the 52786.diff patch, I think it would be useful to add the tests/phpunit/multisite.xml file and the code coverage workflow file .github/workflows/test-coverage.yml as files which should trigger the workflow when changed.

To confirm that my original patch 52786-fix-codecoverage-config.patch actually fixes the issue, see this test run I did:
​https://codecov.io/gh/WordPress/wordpress-develop/tree/trac-51734%2Ffix-code-coverage-reporting/src

Trac ticket: https://core.trac.wordpress.org/ticket/52786

[johnbillion]

Huh, I created this ticket but Trac timed out and I thought it didn't get saved so I went and did something else. Thanks for following up.

[desrosj]

In 50592:

Build/Test Tools: Fix code coverage reporting to generate report from src.

Since [50441-50442] switched the test workflows to run from src instead of build, code coverage reporting has stopped working. This was caused by the code coverage configuration continuing to reference build. This corrects the configuration so coverage reporting can resume.

This change also introduces the workflow_dispatch event to the workflow, which will allow committers to manually run the workflow when desired. For example, to confirm changes to the test suite do not break reporting.

This also adds the phpunit.xml.dist and tests/phpunit/multisite.xml files to the paths list. Since these files are responsible for configuring the test suite and code coverage reporting, any changes to them should verify that no problems were introduced.

Props jrf, johnbillion.
Fixes #52786. See #51734.

Closing as merged.

[desrosj]

In 50595:

Build/Test Tools: Run code coverage workflow when the file is updated.

When the workflow file is updated, it should always be run to verify changes.

Follow up to [50592].

See #52786.

[desrosj]

In 50601:

Build/Test Tools: Backport several build tool fixes & improvements.

This backports a handful of test fixes related to generating code coverage reporting, as well as some devDependency updates.

Backports [50591-50595,50597-50598] to the 5.7 branch.
See #52624, #52786, #51734.

[desrosj]

In 50602:

Build/Test Tools: Backport GitHub Action and build improvements to the 5.6 branch.

This backports several build and test tool improvements to the 5.6 branch. Most notably, this includes:

• The changes required to allow each workflow to be triggered by the workflow_dispatch event so that tests can be run on a schedule [50590].
• The ability to run PHPUnit tests from src instead of build [50441-50443].
• Splitting single site and multisite tests into parallel jobs [50379].
• Split slow tests into separate, parallel jobs for PHP 5.6 [50444].
• Better branch and path scoping for GitHub Action workflows when running on pull_request [50432,50479].
• Several devDependency updates.

Merges [50267,50299,50379,50387,50413,50416,50432,50435-50436,50441-50444,50446,50473-50474,50476,50479,50485-50487,50545,50579,50590,50592,50598] to the 5.6 branch.
See #50401, #51734, #51801, #51802, #52548, #52608, #52612, #52623, #52624, #52625, #52645, #52653, #52658, #52660, #52667, #52786.

[desrosj]

In 50603:

Build/Test Tools: Backport GitHub Action and build improvements to the 5.5 branch.

This backports several build and test tool improvements to the 5.5 branch. Most notably, this includes:

• The changes required to allow each workflow to be triggered by the workflow_dispatch event so that tests can be run on a schedule [50590].
• The ability to run PHPUnit tests from src instead of build [50441-50443].
• Splitting single site and multisite tests into parallel jobs [50379].
• Split slow tests into separate, parallel jobs for PHP 5.6 [50444].
• Better branch and path scoping for GitHub Action workflows when running on pull_request [50432,50479].
• Several devDependency updates.

Merges [50267,50299,50379,50387,50413,50416,50432,50435-50436,50441-50444,50446,50473-50474,50476,50479,50485-50487,50545,50579,50590,50592,50598] to the 5.5 branch.
See #50401, #51734, #51801, #51802, #52548, #52608, #52612, #52623, #52624, #52625, #52645, #52653, #52658, #52660, #52667, #52786.