Tests that the parameters are mandatory in CSSKeyframesRule API. On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE". PASS keyframes.__proto__ is CSSKeyframesRule.prototype PASS keyframes.name is "test1" PASS keyframes.name = null did not throw exception. PASS keyframes.name is "null" PASS successfullyParsed is true TEST COMPLETE