2006819 - [wpt-sync] Sync PR 56845 - feat(ci): Configure Taskcluster to run Test262 tests

Status: NEW

(Testing :: web-platform-tests, task, P4)

Description

[Web Platform Test Sync Bot [:wpt-sync] (Matrix: #interop:mozilla.org)]

Sync web-platform-tests PR 56845 into mozilla-central (this bug is closed when the sync is complete).

PR: https://github.com/web-platform-tests/wpt/pull/56845
Details from upstream follow.

wpt-pr-bot <[e-mail]> wrote:

feat(ci): Configure Taskcluster to run Test262 tests

This commit integrates Test262 test execution into the WPT Taskcluster Continuous Integration system.

Key changes and their purpose:

• Task Definition (tools/ci/tc/tasks/test.yml):
  • A new wpt-test262 component is defined, specifying the common properties and chunking strategy for Test262 tasks within Taskcluster.
  • The main Taskcluster task generation matrix is updated to include test262 as a recognized test suite. This ensures that Taskcluster will automatically create jobs for Test262 across configured browsers and channels (e.g., Firefox Nightly, Chrome Canary).
• CI Validation (tools/ci/tc/tests/test_valid.py):
  • The integration tests for Taskcluster's decision logic (test_valid.py) are updated to expect the new wpt-*-test262-* tasks in the generated task graph. This provides automated validation that the CI configuration is correctly interpreted and will schedule the Test262 tasks as intended.

With these changes, Taskcluster will automatically detect and execute Test262 tests that are present in the third_party/test262 directory (as populated by the automated vendoring workflow).

This work is a fundamental part of the broader Test262 integration effort, as detailed in the RFC: https://github.com/web-platform-tests/rfcs/pull/229

This commit is the final in a series of smaller PRs split from the larger, original implementation in https://github.com/web-platform-tests/wpt/pull/55997.