[comp_label.html]
[aria-label undefined on img w/ alt]
expected: FAIL
[aria-label undefined on img w/o alt]
expected: FAIL
[aria-label undefined on img w/ empty alt]
expected: FAIL
[aria-label undefined on img w/o alt but w/ title]
expected: FAIL
[aria-label undefined on img w/ empty alt but w/ title]
expected: FAIL
[button's hidden referenced name (visibility:hidden) with hidden aria-labelledby traversal falls back to aria-label]
expected: FAIL
[Hidden button's label should be the empty string]
expected: FAIL