transform-in-variant focuses the first property field 250ms after the
transformation. The test ended before that, and the delayed effect ran
during a later test, where dom/get-element failed as there is no
document in the test runner. Each run, a different test failed.
Wait for the focus-property event, and stub dom/get-element meanwhile.
AI-assisted-by: claude-opus-5-5
31493b1525