Use descendant invalidation sets for :valid and :invalid pseudo classes.

On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".

PASS getComputedStyle(inputValid, '').backgroundColor is transparent
PASS internals.updateStyleAndReturnAffectedElementCount() is 1
PASS getComputedStyle(inputValid, '').backgroundColor is green
PASS getComputedStyle(inputInvalid, '').backgroundColor is transparent
PASS internals.updateStyleAndReturnAffectedElementCount() is 1
PASS getComputedStyle(inputInvalid, '').backgroundColor is green
PASS getComputedStyle(formInvalid, '').backgroundColor is transparent
PASS internals.updateStyleAndReturnAffectedElementCount() is 2
PASS getComputedStyle(formValid, '').backgroundColor is green
PASS getComputedStyle(formInvalid, '').backgroundColor is transparent
PASS internals.updateStyleAndReturnAffectedElementCount() is 2
PASS getComputedStyle(formInvalid, '').backgroundColor is green
PASS getComputedStyle(maxlengthInvalid, '').backgroundColor is transparent
PASS internals.updateStyleAndReturnAffectedElementCount() is 1
PASS getComputedStyle(maxlengthInvalid, '').backgroundColor is green
PASS getComputedStyle(minlengthInvalid, '').backgroundColor is transparent
PASS internals.updateStyleAndReturnAffectedElementCount() is 1
PASS getComputedStyle(minlengthInvalid, '').backgroundColor is green
PASS successfullyParsed is true

TEST COMPLETE