public void TryFirstImageExtensionEgJpg_Known_String_SucceedsInFindingImage_Test()
        {
            SimpleImageFinder finder = new SimpleImageFinder();

              string testSource = @"ksjksdlfkfjhttp://www.findmeemdnif.com/picture.jpglkjksdlfkfj";
              Uri imageUri = null;

              bool foundUri_ShouldBeTrue = finder.TryFirstImageExtensionEgJpg(testSource, out imageUri, ".jpg");

              Assert.IsTrue(foundUri_ShouldBeTrue);
              Assert.IsNotNull(imageUri);
        }
        public void TryFirstImageExtensionEgJpg_Known_String_FailsToFindImage_Test()
        {
            SimpleImageFinder finder = new SimpleImageFinder();

              string testSource = @"ksjksdlfkfjhttp://wwwasdfasfd.findmeemdnif.com/sdfsdfpsdfsicture.sdfjpsdfglkjksdlfkfj";
              Uri imageUri = null;

              bool foundUri_ShouldBeFalse = finder.TryFirstImageExtensionEgJpg(testSource, out imageUri, ".jpg");

              Assert.IsFalse(foundUri_ShouldBeFalse);
              Assert.IsNull(imageUri);
        }