public void TryCompleteWithNoWrites()
{
var fake = new FakeWriter();
var writer = new BufferedClientStreamWriter <string>(fake, 5);
var completionTask = writer.TryWriteCompleteAsync();
Assert.NotNull(completionTask);
var impossibleCompletationTask = writer.TryWriteCompleteAsync();
Assert.Null(impossibleCompletationTask);
fake.CompleteCurrentTask();
AssertCompletedWithStatus(completionTask, TaskStatus.RanToCompletion);
fake.AssertMessages();
fake.AssertCompleted();
}
public void TryWriteBeyondBuffer()
{
var fake = new FakeWriter();
var writer = new BufferedClientStreamWriter <string>(fake, 2);
var task1 = writer.WriteAsync("1");
var task2 = writer.WriteAsync("2");
var task3 = writer.TryWriteAsync("3");
Assert.Null(task3); // Couldn't write.
fake.CompleteCurrentTask(); // Message 1
WaitForSpace(writer);
// Now the buffer is smaller, we can write again.
var task4 = writer.TryWriteAsync("4");
Assert.NotNull(task4);
// Try to write completion, will fail as buffer is full.
var completionTask1 = writer.TryWriteCompleteAsync();
Assert.Null(completionTask1);
fake.CompleteCurrentTask(); // Message 2
WaitForSpace(writer);
// Now the buffer is smaller, we can write completion.
var completionTask2 = writer.TryWriteCompleteAsync();
Assert.NotNull(completionTask2);
fake.CompleteCurrentTask(); // Message 4
fake.CompleteCurrentTask(); // Completion
AssertCompletedWithStatus(task1, TaskStatus.RanToCompletion);
AssertCompletedWithStatus(task2, TaskStatus.RanToCompletion);
AssertCompletedWithStatus(task4, TaskStatus.RanToCompletion);
AssertCompletedWithStatus(completionTask2, TaskStatus.RanToCompletion);
fake.AssertMessages("1", "2", "4");
fake.AssertCompleted();
}
public void CompletionUsesBufferSpace()
{
var fake = new FakeWriter();
var writer = new BufferedClientStreamWriter <string>(fake, 2);
writer.WriteAsync("1");
writer.WriteAsync("2");
// Try completion, should throw because queue is full.
// The (object) cast is because to make xUnit understand that the call itself should throw;
// we don't return a failed task.
Assert.Throws <InvalidOperationException>(() => (object)writer.WriteCompleteAsync());
// Try completion, should return null because queue is full.
Assert.Null(writer.TryWriteCompleteAsync());
fake.CompleteCurrentTask();
fake.CompleteCurrentTask();
writer.WriteCompleteAsync();
fake.CompleteCurrentTask();
fake.AssertCompleted();
}
/// <inheritdoc/> public override Task TryWriteCompleteAsync() => _writeBuffer.TryWriteCompleteAsync();
