private void DoTest(string testInput, Styler styler)
        {
            string actualOutputFile = testInput.Replace(".xaml", "_output.xaml");
            string expectedOutputFile = testInput.Replace(".xaml", "_output_expected.xaml");

            string output = styler.FormatFile(testInput);

            File.WriteAllText(actualOutputFile, output);

            Assert.IsTrue(this.FileCompare(actualOutputFile, expectedOutputFile));
        }