private void AssertValidUri(HeuristicLinkDetector detector, string input, string absoluteUri)
        {
            Uri uri;

            Assert.True(detector.TryCreateUri(input, out uri));
            Assert.Equal(absoluteUri, uri.AbsoluteUri);
        }
        private void AssertInvalidUri(HeuristicLinkDetector detector, string input)
        {
            Uri uri;

            Assert.False(detector.TryCreateUri(input, out uri));
        }