Tests that CSSStyleDeclaration.cssText is not nullable On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE". PASS style.cssText is "" PASS style.cssText = 'margin: 0px;' did not throw exception. PASS style.cssText is "margin: 0px;" PASS style.cssText = null did not throw exception. PASS style.cssText is "" PASS successfullyParsed is true TEST COMPLETE