Testing -internal-marquee-direction
PASS window.getComputedStyle(element).getPropertyValue(property) is null
-PASS element.style.getPropertyCSSValue(property) is null
+PASS element.style[property] is undefined.
Value after setting -internal-marquee-direction to alternate
-PASS element.style.getPropertyCSSValue(property) is null
+PASS element.style[property] is undefined.
PASS successfullyParsed is true