public void ShouldContainSecondUri()
 {
     var attribute = new GetAttribute("first", "second");
     Assert.That(attribute.Contains(new GetAttribute("second")));
 }
 public void ContainerMustBeASupersetOfContained()
 {
     var attribute = new GetAttribute("first", "second");
     Assert.That(attribute.Contains(new GetAttribute("second", "third")), Is.False);
 }