public void NullSourceListViolatesContract()
 {
     TestImplementation sut = new TestImplementation();
     XUnitHelper.ViolatesConstraint(() => sut.Compare(null), "imageList != null");
 }
 public void EmptySourceListViolatesContract()
 {
     TestImplementation sut = new TestImplementation();
     XUnitHelper.ViolatesConstraint(() => sut.Compare(new ReadOnlyCollection<FileInfo>(new List<FileInfo>())), "imageList.Count > 0");
 }