public void BehaviorAfterCompleteCalled()
{
var fake = new FakeWriter();
var writer = new BufferedClientStreamWriter <string>(fake, 5);
writer.WriteCompleteAsync();
// The (object) casts are because to make xUnit understand that the call itself should throw;
// we don't return a failed task.
Assert.Throws <InvalidOperationException>(() => (object)writer.WriteCompleteAsync());
Assert.Throws <InvalidOperationException>(() => (object)writer.WriteAsync("x"));
Assert.Null(writer.TryWriteAsync("y"));
}
public void WritesAfterMessagesAreSent()
{
// Unlike most other tests, here we write a message, the server completes the
// task, write another message, server completes etc.
var fake = new FakeWriter();
var writer = new BufferedClientStreamWriter <string>(fake, 5);
// First message
var task1 = writer.WriteAsync("1");
fake.CompleteCurrentTask();
AssertCompletedWithStatus(task1, TaskStatus.RanToCompletion);
// Second message
var task2 = writer.WriteAsync("2");
fake.CompleteCurrentTask();
AssertCompletedWithStatus(task2, TaskStatus.RanToCompletion);
// Completion
var completionTask = writer.WriteCompleteAsync();
fake.CompleteCurrentTask();
AssertCompletedWithStatus(completionTask, TaskStatus.RanToCompletion);
fake.AssertMessages("1", "2");
fake.AssertCompleted();
}
public void CompleteAfterMessages()
{
var fake = new FakeWriter();
var writer = new BufferedClientStreamWriter <string>(fake, 5);
var task1 = writer.WriteAsync("1");
var task2 = writer.WriteAsync("2");
var completionTask = writer.WriteCompleteAsync();
AssertNotCompleted(task1, task2, completionTask);
// Server handles first message
fake.CompleteCurrentTask();
AssertCompletedWithStatus(task1, TaskStatus.RanToCompletion);
AssertNotCompleted(task2, completionTask);
// Server handles second message
fake.CompleteCurrentTask();
AssertCompletedWithStatus(task2, TaskStatus.RanToCompletion);
AssertNotCompleted(completionTask);
// Server handles completion
fake.CompleteCurrentTask();
AssertCompletedWithStatus(completionTask, TaskStatus.RanToCompletion);
fake.AssertMessages("1", "2");
fake.AssertCompleted();
}
public void FaultedWriteFailsPendingTasks()
{
var fake = new FakeWriter();
var writer = new BufferedClientStreamWriter <string>(fake, 5);
var task1 = writer.WriteAsync("1");
var task2 = writer.WriteAsync("2");
var task3 = writer.WriteAsync("3");
var completionTask = writer.WriteCompleteAsync();
AssertNotCompleted(task1, task2, task3, completionTask);
// Server handles first message successfully
fake.CompleteCurrentTask();
AssertCompletedWithStatus(task1, TaskStatus.RanToCompletion);
AssertNotCompleted(task2, task3, completionTask);
// Server fails second message. All pending tasks become faulted with the same exception.
var exception = new Exception("Bang");
fake.FailCurrentTask(exception);
foreach (var task in new[] { task2, task3, completionTask })
{
AssertCompletedWithStatus(task, TaskStatus.Faulted);
Assert.Same(exception, task.Exception.InnerExceptions[0]);
}
}
public void CompleteWithNoWrites()
{
var fake = new FakeWriter();
var writer = new BufferedClientStreamWriter <string>(fake, 5);
var completionTask = writer.WriteCompleteAsync();
fake.CompleteCurrentTask();
AssertCompletedWithStatus(completionTask, TaskStatus.RanToCompletion);
fake.AssertMessages();
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();
}
public void WriteBeyondBuffer()
{
var fake = new FakeWriter();
var writer = new BufferedClientStreamWriter <string>(fake, 2);
var task1 = writer.WriteAsync("1");
var task2 = writer.WriteAsync("2");
// 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.WriteAsync("3"));
fake.CompleteCurrentTask(); // Message 1
WaitForSpace(writer);
// Now the buffer is smaller, we can write again.
var task4 = writer.WriteAsync("4");
// Completion fails, no space in buffer
Assert.Throws <InvalidOperationException>(() => (object)writer.WriteCompleteAsync());
fake.CompleteCurrentTask(); // Message 2
WaitForSpace(writer);
// Completion succeeds, there is now space in the buffer.
var completionTask = writer.WriteCompleteAsync();
fake.CompleteCurrentTask(); // Message 4
fake.CompleteCurrentTask(); // Completion
AssertCompletedWithStatus(task1, TaskStatus.RanToCompletion);
AssertCompletedWithStatus(task2, TaskStatus.RanToCompletion);
AssertCompletedWithStatus(task4, TaskStatus.RanToCompletion);
AssertCompletedWithStatus(completionTask, TaskStatus.RanToCompletion);
fake.AssertMessages("1", "2", "4");
fake.AssertCompleted();
}
public void FaultedWriteFailsFutureTasks()
{
var fake = new FakeWriter();
var writer = new BufferedClientStreamWriter <string>(fake, 5);
var task1 = writer.WriteAsync("1");
// Server fails first message
var exception = new Exception("Bang");
fake.FailCurrentTask(exception);
// Subsequent calls to Write and Complete fail
var task2 = writer.WriteAsync("2");
var task3 = writer.WriteAsync("3");
var completionTask = writer.WriteCompleteAsync();
foreach (var task in new[] { task1, task2, task3, completionTask })
{
AssertCompletedWithStatus(task, TaskStatus.Faulted);
Assert.Same(exception, task.Exception.InnerExceptions[0]);
}
}
/// <inheritdoc/> public override Task WriteCompleteAsync() => _writeBuffer.WriteCompleteAsync();