public async Task PublishAsync_SampleMessage_IncreaseMessageHandlerShouldNotReceiveMessage()
{
// Arrange
IServiceCollection services = new ServiceCollection();
services.AddSingleton <IMessageBus, InMemoryMessageBus>();
services.AddSingleton <SampleMessageHandler>();
services.AddSingleton <ToLowerSampleMessageHandler>();
services.AddSingleton <IncreaseMessageHandler>();
IServiceProvider provider = services.BuildServiceProvider();
IMessageBus messageBus = provider.GetRequiredService <IMessageBus>();
SampleMessageHandler sampleMessageHandler = provider.GetRequiredService <SampleMessageHandler>();
ToLowerSampleMessageHandler toLowerSampleMessageHandler = provider.GetRequiredService <ToLowerSampleMessageHandler>();
IncreaseMessageHandler increaseMessageHandler = provider.GetRequiredService <IncreaseMessageHandler>();
messageBus.Subscribe <SampleMessageHandler, SampleMessage>();
messageBus.Subscribe <ToLowerSampleMessageHandler, SampleMessage>();
messageBus.Subscribe <IncreaseMessageHandler, IncreaseMessage>();
var sampleMessage = new SampleMessage("Hello Test");
// Act
await messageBus.PublishAsync(sampleMessage);
// Assert
Assert.AreEqual("Hello Test", sampleMessageHandler.MyMessage);
Assert.AreEqual("hello test", toLowerSampleMessageHandler.MyMessage);
Assert.AreEqual(0, increaseMessageHandler.Value);
}
public async Task PublishAsync_IncreaseMessageInitialValueIs0_FinalValueIs42()
{
// Arrange
IServiceCollection services = new ServiceCollection();
services.AddSingleton <IMessageBus, InMemoryMessageBus>();
services.AddSingleton <IncreaseMessageHandler>();
IServiceProvider provider = services.BuildServiceProvider();
IMessageBus messageBus = provider.GetRequiredService <IMessageBus>();
IncreaseMessageHandler handler = provider.GetRequiredService <IncreaseMessageHandler>();
messageBus.Subscribe <IncreaseMessageHandler, IncreaseMessage>();
var firstMessage = new IncreaseMessage(40);
var secondMessage = new IncreaseMessage(2);
// Act
await messageBus.PublishAsync(firstMessage);
await messageBus.PublishAsync(secondMessage);
// Assert
Assert.AreEqual(42, handler.Value);
}