Unit tests: mock matchMedia to enforce prefers-reduce-motion #65438
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ciampo
added
[Type] Enhancement
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Size Change: 0 B Total Size: 1.77 MB ℹ️ View Unchanged
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tyxla
approved these changes
Sep 18, 2024
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What?
Enforce the
prefers-reduced-motionmedia feature on all Jest unit tests.Props to @tyxla for pushing the solution proposed in this PR as part of the work in #65203
Why?
Working on a few animations (for example, #65203 and #64777) we realised that
js-domdoesn't fully support CSS animations. We think that disabling animations via enforcing theprefers-reduced-motionoption can improve unit test reliability.How?
Added a global Jest mock that forces the
window.matchMediafunction to always match theprefers-reduced-motionquery.Testing Instructions
All unit tests should continue passing.