public async Task OutputDebouncerDoesNotDuplicateOutput()
{
TestMessageSender messageSender = new TestMessageSender();
OutputDebouncer debouncer = new OutputDebouncer(messageSender);
// Send many messages in quick succession to ensure that
// output is not being duplicated in subsequent events.
for (int i = 1; i <= 50; i++)
{
await SendOutput(debouncer, "Output " + i, true);
if (i == 25)
{
// Artificially insert a delay to force another event
await Task.Delay(OutputDebouncer.OutputFlushInterval + 100);
}
}
// Wait for the final event to be written
await Task.Delay(OutputDebouncer.OutputFlushInterval + 100);
// Ensure that the two events start with the correct lines
Assert.Equal(2, messageSender.OutputEvents.Count);
Assert.Equal("Output 1", messageSender.OutputEvents[0].Output.Split('\n')[0].Trim('\r'));
Assert.Equal("Output 26", messageSender.OutputEvents[1].Output.Split('\n')[0].Trim('\r'));
}
public async Task OutputDebouncerAggregatesOutputEvents()
{
TestMessageSender messageSender = new TestMessageSender();
OutputDebouncer debouncer = new OutputDebouncer(messageSender);
await SendOutput(debouncer, "This ");
await SendOutput(debouncer, "is a ");
await SendOutput(debouncer, "test", true);
await SendOutput(debouncer, "Another line");
// Make sure no output events have been written yet
Assert.Empty(messageSender.OutputEvents);
// Wait for the output to be flushed
await Task.Delay(OutputDebouncer.OutputFlushInterval + 100);
// Write some more output after the first flush
await SendOutput(debouncer, "Another test line", true);
await SendOutput(debouncer, "for great justice");
// Assert that there's only one event with the expected string
Assert.Single(messageSender.OutputEvents);
Assert.Equal(
TestUtilities.NormalizeNewlines("This is a test\nAnother line"),
messageSender.OutputEvents[0].Output);
// Wait for the next output to be flushed
await Task.Delay(OutputDebouncer.OutputFlushInterval + 100);
// Assert that there's only one event with the expected string
Assert.Equal(2, messageSender.OutputEvents.Count);
Assert.Equal(
TestUtilities.NormalizeNewlines("Another test line\nfor great justice"),
messageSender.OutputEvents[1].Output);
}