[CSSStyleSheet.html]
  [addRule with no argument adds "undefined" selector]
    expected: FAIL

  [removeRule on empty style sheet throws]
    expected: FAIL

  [cssRules and rules are the same object]
    expected: FAIL

  [addRule with index greater than length throws]
    expected: FAIL

  [addRule with #foo selectors]
    expected: FAIL

  [removeRule(1)]
    expected: FAIL

  [removeRule with no argument removes first rule]
    expected: FAIL

  [addRule with @media rule]
    expected: FAIL