public static void UpdateTagSpansRemovesOldSpans()
{
var buffer = new FakeTextBuffer(string.Empty);
var tagger = new TestableTemplateTagger(buffer);
tagger.CreateTagSpan(buffer.CurrentSnapshot.CreateTrackingSpan(new Span(), SpanTrackingMode.EdgeNegative), new ErrorTag());
tagger.UpdateTagSpans(new TemplateAnalysis(null, null, null));
Assert.Equal(0, tagger.GetTags(new NormalizedSnapshotSpanCollection(new SnapshotSpan(buffer.CurrentSnapshot, 0, buffer.CurrentSnapshot.Length))).Count());
}
public static void UpdateTagSpansCreatesNewTagSpans()
{
var buffer = new FakeTextBuffer(string.Empty);
var tagger = new TestableTemplateTagger(buffer);
bool tagsCreated = false;
tagger.CreateTagSpansMethod = snapshot => tagsCreated = true;
tagger.UpdateTagSpans(new TemplateAnalysis(null, null, null));
Assert.True(tagsCreated);
}
public static void UpdateTagSpansRaisesTagsChangedEventOnlyOnce()
{
var buffer = new FakeTextBuffer(string.Empty);
var tagger = new TestableTemplateTagger(buffer);
tagger.CreateTagSpansMethod = analysis =>
{
tagger.CreateTagSpan(analysis.TextSnapshot.CreateTrackingSpan(new Span(), SpanTrackingMode.EdgeNegative), new ErrorTag());
tagger.CreateTagSpan(analysis.TextSnapshot.CreateTrackingSpan(new Span(), SpanTrackingMode.EdgeNegative), new ErrorTag());
};
int tagsChangedEventCount = 0;
tagger.TagsChanged += (sender, args) => tagsChangedEventCount++;
tagger.UpdateTagSpans(new TemplateAnalysis(new FakeTextSnapshot(string.Empty), null, null));
Assert.Equal(1, tagsChangedEventCount);
}