public async Task Subscribe_AfterUnsubscribing_CreatesNewReader(
string topic,
IDisposableBlockingRawMessageReader <IPollingOptions> reader,
[Frozen] IPollingOptions options,
[Frozen] IRawMessageHandler rawMessageHandler,
[Frozen] IBlockingRawMessageReaderFactory <IPollingOptions> factory,
BlockingReaderRawMessageHandlerSubscriber <IPollingOptions> sut)
{
// Arrange
factory.Create(topic, options).Returns(reader);
var disposeEvent = new ManualResetEventSlim();
reader.When(r => r.Dispose()).Do(r => disposeEvent.Set());
// Act
await sut.Subscribe(topic, rawMessageHandler, None);
await sut.Unsubscribe(topic, rawMessageHandler, None);
Assert.True(disposeEvent.Wait(1000)); // wait task complete
await sut.Subscribe(topic, rawMessageHandler, None);
// Assert
factory.Received(2).Create(topic, options);
}
public async Task Dispose_DisposesAllReaders(
string topic,
IDisposableBlockingRawMessageReader <IPollingOptions> firstReader,
IDisposableBlockingRawMessageReader <IPollingOptions> secondReader,
[Frozen] IPollingOptions options,
IRawMessageHandler firstRawMessageHandler,
IRawMessageHandler secondRawMessageHandler,
[Frozen] IBlockingRawMessageReaderFactory <IPollingOptions> factory,
BlockingReaderRawMessageHandlerSubscriber <IPollingOptions> sut)
{
// Arrange
factory.Create(topic, options).Returns(firstReader, secondReader);
var firstDisposeEvent = new ManualResetEventSlim();
firstReader.When(r => r.Dispose()).Do(r => firstDisposeEvent.Set());
var secondDisposeEvent = new ManualResetEventSlim();
firstReader.When(r => r.Dispose()).Do(r => secondDisposeEvent.Set());
await sut.Subscribe(topic, firstRawMessageHandler, None);
await sut.Subscribe(topic, secondRawMessageHandler, None);
// Act
sut.Dispose();
// Assert
Assert.True(firstDisposeEvent.Wait(1000));
Assert.True(secondDisposeEvent.Wait(1000));
}
public void Constructor_NullOptions_ThrowsArgumentNull(IBlockingRawMessageReaderFactory <IPollingOptions> factory)
{
var ex = Assert.Throws <ArgumentNullException>(() =>
new BlockingReaderRawMessageHandlerSubscriber <IPollingOptions>(factory, null));
Assert.Equal("options", ex.ParamName);
}
public async Task Subscribe_HandlerThrows_DisposesReader(
string topic,
byte[] message,
IDisposableBlockingRawMessageReader <IPollingOptions> reader,
[Frozen] IPollingOptions options,
[Frozen] IRawMessageHandler rawMessageHandler,
[Frozen] IBlockingRawMessageReaderFactory <IPollingOptions> factory,
BlockingReaderRawMessageHandlerSubscriber <IPollingOptions> sut)
{
// Arrange
factory.Create(topic, options).Returns(reader);
var disposeEvent = new ManualResetEventSlim();
reader.When(r => r.Dispose()).Do(r => disposeEvent.Set());
reader.TryGetMessage(out var _, options)
.Returns(r =>
{
r[0] = message;
return(true);
});
rawMessageHandler.Handle(topic, message, Arg.Any <CancellationToken>())
.Throws <ArgumentNullException>();
// Act
await sut.Subscribe(topic, rawMessageHandler, None);
// Assert
Assert.True(disposeEvent.Wait(1000));
}
public async Task Unsubscribe_DifferentTopics_DisposesSingleReader(
string firstTopic,
string secondTopic,
IDisposableBlockingRawMessageReader <IPollingOptions> firstReader,
IDisposableBlockingRawMessageReader <IPollingOptions> secondReader,
[Frozen] IPollingOptions options,
IRawMessageHandler firstRawMessageHandler,
IRawMessageHandler secondRawMessageHandler,
[Frozen] IBlockingRawMessageReaderFactory <IPollingOptions> factory,
BlockingReaderRawMessageHandlerSubscriber <IPollingOptions> sut)
{
// Arrange
factory.Create(firstTopic, options).Returns(firstReader);
factory.Create(secondTopic, options).Returns(secondReader);
var disposeEvent = new ManualResetEventSlim();
firstReader.When(r => r.Dispose()).Do(r => disposeEvent.Set());
// Act
await sut.Subscribe(firstTopic, firstRawMessageHandler, None);
await sut.Subscribe(secondTopic, secondRawMessageHandler, None);
await sut.Unsubscribe(firstTopic, firstRawMessageHandler, None);
// Assert
Assert.True(disposeEvent.Wait(1000));
secondReader.DidNotReceive().Dispose();
}
public async Task Subscribe_ReaderFactoryThrows_SubscriptionFails(
string topic,
IRawMessageHandler rawMessageHandler,
[Frozen] IPollingOptions options,
[Frozen] IBlockingRawMessageReaderFactory <IPollingOptions> factory,
BlockingReaderRawMessageHandlerSubscriber <IPollingOptions> sut)
{
factory.Create(topic, options).Throws(new DivideByZeroException());
await Assert.ThrowsAsync <DivideByZeroException>(() => sut.Subscribe(topic, rawMessageHandler, None));
}
public async Task Subscribe_MultipleCallsSameRawHandler_CreatesSingleReader(
string topic,
IRawMessageHandler rawMessageHandler,
[Frozen] IPollingOptions options,
[Frozen] IBlockingRawMessageReaderFactory <IPollingOptions> factory,
BlockingReaderRawMessageHandlerSubscriber <IPollingOptions> sut)
{
var tasks = Enumerable.Range(1, 5).Select(_ => sut.Subscribe(topic, rawMessageHandler, None));
await Task.WhenAll(tasks);
factory.Received(1).Create(topic, options);
}
public async Task Subscribe_CancelledToken_CancelsSubscriptionTask(
string topic,
IRawMessageHandler rawMessageHandler,
[Frozen] IPollingOptions options,
[Frozen] IBlockingRawMessageReaderFactory <IPollingOptions> factory,
BlockingReaderRawMessageHandlerSubscriber <IPollingOptions> sut)
{
// Arrange
var cts = new CancellationTokenSource();
cts.Cancel();
// Act
var task = sut.Subscribe(topic, rawMessageHandler, cts.Token);
// Assert
await Assert.ThrowsAsync <TaskCanceledException>(() => task);
factory.DidNotReceiveWithAnyArgs().Create(topic, options);
}
public async Task Subscribe_ReaderThrows_DisposesReader(
string topic,
IRawMessageHandler rawMessageHandler,
IDisposableBlockingRawMessageReader <IPollingOptions> reader,
[Frozen] IPollingOptions options,
[Frozen] IBlockingRawMessageReaderFactory <IPollingOptions> factory,
BlockingReaderRawMessageHandlerSubscriber <IPollingOptions> sut)
{
factory.Create(topic, options).Returns(reader);
var disposeEvent = new ManualResetEventSlim();
reader.When(r => r.Dispose()).Do(r => disposeEvent.Set());
reader.TryGetMessage(out var _, options)
.Throws <ArgumentNullException>();
await sut.Subscribe(topic, rawMessageHandler, None);
Assert.True(disposeEvent.Wait(1000));
}
public async Task Unsubscribe_CallbackInvoked(
string topic,
IDisposableBlockingRawMessageReader <IPollingOptions> reader,
[Frozen] IPollingOptions options,
[Frozen] IRawMessageHandler rawMessageHandler,
[Frozen] IBlockingRawMessageReaderFactory <IPollingOptions> factory,
BlockingReaderRawMessageHandlerSubscriber <IPollingOptions> sut)
{
// Arrange
var callbackInvokedEvent = new ManualResetEventSlim();
options.ReaderStoppingCallback = (t, handler, arg3) => callbackInvokedEvent.Set();
factory.Create(topic, options).Returns(reader);
// Act
await sut.Subscribe(topic, rawMessageHandler, None);
await sut.Unsubscribe(topic, rawMessageHandler, None);
// Assert
Assert.True(callbackInvokedEvent.Wait(1000));
}
public async Task Subscribe_MultipleCallsDifferentRawHandlers_CreatesSingleReader(
string topic,
IRawMessageHandler firstRawMessageHandler,
IRawMessageHandler secondRawMessageHandler,
[Frozen] IPollingOptions options,
[Frozen] IBlockingRawMessageReaderFactory <IPollingOptions> factory,
BlockingReaderRawMessageHandlerSubscriber <IPollingOptions> sut)
{
await Task.WhenAll(Subscrioptions());
factory.Received(2).Create(topic, options);
IEnumerable <Task> Subscrioptions()
{
for (int i = 0; i < 5; i++)
{
yield return(sut.Subscribe(topic, firstRawMessageHandler, None));
yield return(sut.Subscribe(topic, secondRawMessageHandler, None));
}
}
}