References — bi-13-tests-wpt

Primary sources first. In-tree Chromium docs beat any external source, including these modules.

• docs/testing/web_tests.md and the web-test expectations documentation in your checkout.
• third_party/blink/web_tests/TestExpectations.
• web-platform-tests documentation; testharness.js API.
• docs/testing/ generally — browser tests, unit tests, flakiness policy.

When a claim here proves stale, record it in PROGRESS.md section 7.