public void FormattedStringBuilderEndToEnd1()
        {
            var classificationFormatMap = new MockClassificationFormatMap();
            var htmlMarkupProvider = new HtmlMarkupProvider(
                classificationFormatMap,
                MockClassificationType.Default,
                Brushes.White);
            var classifier = new MockClassifier();

            var formattedStringBuilder = new FormattedStringBuilder(
                htmlMarkupProvider,
                classifier,
                MockClassificationType.Default,
                waitIndicator: null);

            var snapshot = new MockTextSnapshot("bla");
            var spans = new NormalizedSnapshotSpanCollection(new []
            {
                new SnapshotSpan(snapshot, 0, 3)
            });

            var actualResult = formattedStringBuilder.AppendSnapshotSpans(spans);
            var expectedResult = "<pre style=\"font-family:Consolas;font-size:12;color:black;background:white;\">b<span style=\"color:blue;\">l</span>a\r\n</pre>";

            Assert.AreEqual(expectedResult, actualResult);
        }