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 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_CallbackRethrows_UnsubscribeDoesNotFailAwait(
string topic,
[Frozen] IPollingOptions options,
[Frozen] IRawMessageHandler rawMessageHandler,
BlockingReaderRawMessageHandlerSubscriber <IPollingOptions> sut)
{
// Arrange
options.ReaderStoppingCallback = (s, handler, ex) => throw ex;
// Act
await sut.Subscribe(topic, rawMessageHandler, None);
// await doesn't throw on OperationCancelledException
await sut.Unsubscribe(topic, rawMessageHandler, None);
}
public async Task Subscribe_CallbackNull_DoesntThrow(
string topic,
IDisposableBlockingRawMessageReader <IPollingOptions> reader,
[Frozen] IPollingOptions options,
[Frozen] IRawMessageHandler rawMessageHandler,
BlockingReaderRawMessageHandlerSubscriber <IPollingOptions> sut)
{
// Arrange
options.ReaderStoppingCallback = null;
options.ErrorCallback = null;
reader.TryGetMessage(out var _, options).Throws <DivideByZeroException>();
// Act
await sut.Subscribe(topic, rawMessageHandler, None);
// await doesn't throw on OperationCancelledException
await sut.Unsubscribe(topic, rawMessageHandler, None);
}
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));
}
