Add null check to aria-utils checking for expected values are provided #56889
+6
−0
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This change simply adds some null checks to ensure that the test author specified expectation attributes, and if they did not, fails in such a way that the author could quickly fix.
Original, reverted PR: #49485
Difference from original: This change uses "hasAttribute" to ensure that this doesn't get triggered when attributes exist but contain empty strings. This came from a comment on the original PR.
Closes web-platform-tests/interop-accessibility#74