public async Task When_Reader_Completes_When_All_Readers_Completed()
{
// Arrange
using var multiplexer = new MergingMultiplexer(10, _outputHelper.ToLogger <MergingMultiplexer>());
var cts = new CancellationTokenSource();
var channel1 = Channel.CreateBounded <IQueueMessageContext>(10);
var channel2 = Channel.CreateBounded <IQueueMessageContext>(10);
multiplexer.ReadFrom(channel1);
multiplexer.ReadFrom(channel2);
// Act
await multiplexer.RunAsync(cts.Token);
var multiplexerRunTask = ReadAllMessages(multiplexer);
channel1.Writer.Complete();
channel2.Writer.Complete();
// Assert
await Patiently.AssertThatAsync(_outputHelper, () => multiplexerRunTask.IsCompletedSuccessfully);
cts.Cancel();
}
public async Task When_Reader_Does_Not_Complete_Readers_Not_Completed()
{
// Arrange
using var multiplexer = new MergingMultiplexer(10, _outputHelper.ToLogger <MergingMultiplexer>());
var cts = new CancellationTokenSource();
var channel1 = Channel.CreateBounded <IQueueMessageContext>(10);
var channel2 = Channel.CreateBounded <IQueueMessageContext>(10);
multiplexer.ReadFrom(channel1);
multiplexer.ReadFrom(channel2);
// Act
await multiplexer.RunAsync(cts.Token);
var multiplexerRunTask = ReadAllMessages(multiplexer);
channel1.Writer.Complete();
// Assert
var delay = Task.Delay(TimeoutPeriod);
var completedTask = await Task.WhenAny(multiplexerRunTask, delay);
Assert.Equal(delay, completedTask);
cts.Cancel();
}
public void Cannot_Add_Invalid_Reader()
{
// Arrange
using var multiplexer = new MergingMultiplexer(10, _outputHelper.ToLogger <MergingMultiplexer>());
// Act and Assert
Assert.Throws <ArgumentNullException>(() => multiplexer.ReadFrom(null));
}
public void Cannot_Get_Messages_Before_Started()
{
// Arrange
using var multiplexer = new MergingMultiplexer(10, _outputHelper.ToLogger <MergingMultiplexer>());
// Act and Assert
Assert.ThrowsAsync <InvalidOperationException>(async() => await ReadAllMessages(multiplexer));
}
public async Task Starting_Twice_Returns_Same_Task()
{
// Arrange
using var multiplexer = new MergingMultiplexer(10, _outputHelper.ToLogger <MergingMultiplexer>());
var cts = new CancellationTokenSource();
// Act
Task completed1 = multiplexer.RunAsync(cts.Token);
Task completed2 = multiplexer.RunAsync(cts.Token);
// Assert
Assert.Equal(completed1, completed2);
cts.Cancel();
try
{
await completed1;
}
catch (OperationCanceledException)
{
// Ignore
}
}
