text: description("This tests checks that all of the input values for background-size parse correctly.");
  
  function test(value)
  {
      var div = document.createElement("div");
      div.setAttribute("style", value);
      document.body.appendChild(div);
      
      var result = div.style.getPropertyValue(value.substring(0, value.indexOf(":")));
      document.body.removeChild(div);
      return result;
  }
  
  shouldBe('test("background-size: contain;")', '"contain"');
  shouldBe('test("background-size: cover;")', '"cover"');
  shouldBe('test("background-size: 100 100;")', 'null');
  shouldBe('test("background-size: 100px 100px;")', '"100px 100px"');
  shouldBe('test("background-size: auto 50px;")', '"auto 50px"');
  shouldBe('test("background-size: 50px auto;")', '"50px"');
  shouldBe('test("background-size: auto auto;")', '"auto"');
  shouldBe('test("background-size: 30% 20%;")', '"30% 20%"');
  shouldBe('test("background-size: 4em auto;")', '"4em"');
  shouldBe('test("background-size: 5em;")', '"5em"');
  shouldBe('test("-webkit-background-size: 5em ;")', '"5em"');
  
  shouldBe('test("background-size: 100px 100px 100px;")', 'null');
  shouldBe('test("background-size: coconut;")', 'null');
  
  shouldBe('test("background-size: 100px,;")', 'null');
  shouldBe('test("background-size: 100px, 50%;")', '"100px, 50%"');
  shouldBe('test("-webkit-background-size: 100px, 50%;")', '"100px, 50%"');
  shouldBe('test("background-size: 50% 100px, 2em, 100px 50%;")', '"50% 100px, 2em, 100px 50%"');
  shouldBe('test("-webkit-background-size: 50% 100px, 2em, 100px 50%;")', '"50% 100px, 2em, 100px 50%"');
  