owGap, "normal");
        assert_equals(getComputedStyle(target).columnGap, "normal");
      }, "'none' gap is invalid");
    test(
      function(){
        var target = document.getElementById("invalidGapAngle");
        assert_equals(getComputedStyle(target).rowGap, "normal");
        assert_equals(getComputedStyle(target).columnGap, "normal");
      }, "Angle gap is invalid");
    test(
      function(){
        var target = document.getElementById("invalidGapResolution");
        assert_equals(getCompu