public void PrioritizeVisibleLines()
{
CreateWithView("dog", "cat", "dog", "bear");
_mockFactory.SetVisibleLineRange(_mockTextView, _textBuffer.GetLineRange(2));
_asyncTagger.GetTags(_textBuffer.GetLineRange(0).Extent);
_asyncTagger.AsyncBackgroundRequestData.Value.Task.Wait();
// The visible lines will finish first and post. Let only this one go through
TestableSynchronizationContext.RunOne();
var tags = _asyncTagger.GetTags(_textBuffer.GetExtent());
Assert.Equal(
new[] { _textBuffer.GetLineSpan(2, 3) },
tags.Select(x => x.Span));
}
public void BackgroundCompleted()
{
Create("dog", "cat", "fish", "dog");
_asyncTaggerSource.SetBackgroundFunc(span => TestUtils.GetDogTags(span));
_asyncTagger.GetTags(_textBuffer.GetLineRange(0).Extent);
_asyncTagger.AsyncBackgroundRequestData.Value.Task.Wait();
// The background request is now complete and it's posted to the UI thread. Create a
// new request on a new snapshot. This will supercede the existing request
_textBuffer.Replace(new Span(0, 0), "big ");
_asyncTagger.GetTags(_textBuffer.GetLineRange(0).Extent);
Assert.True(_asyncTagger.AsyncBackgroundRequestData.HasValue);
var tokenSource = _asyncTagger.AsyncBackgroundRequestData.Value.CancellationTokenSource;
// The background will try to post twice (once for progress and the other for complete)
for (int i = 0; i < 2; i++)
{
TestableSynchronizationContext.RunOne();
Assert.True(_asyncTagger.AsyncBackgroundRequestData.HasValue);
Assert.Equal(tokenSource, _asyncTagger.AsyncBackgroundRequestData.Value.CancellationTokenSource);
}
}