public async Task StartAsync_should_log_exceptions()
{
var messages = new[]
{
DummyMessage.New(),
};
var asyncMessages = GetMessagesAsync(messages);
var processor = NSubstitute.Substitute.For <IMessageProcessor>();
var ex = new Exception("whoops");
processor.When(p => p.ProcessAsync(messages[0], Arg.Any <CancellationToken>()))
.Throw(ex);
var reader = NSubstitute.Substitute.For <ChannelReader <DummyMessage> >();
reader.ReadAllAsync()
.ReturnsForAnyArgs(asyncMessages);
var logger = new FakeLogger <InMemorySubscriber <DummyMessage> >();
var sut = new InMemorySubscriber <DummyMessage>(processor, reader, logger);
await sut.StartAsync();
logger.Logs.Count.Should().Be(1);
logger.Logs.Should().Contain(l => l.ex == ex);
}
public async Task StartAsync_should_consume_messages()
{
var processor = NSubstitute.Substitute.For <IMessageProcessor>();
var messages = new[]
{
DummyMessage.New(),
DummyMessage.New(),
};
var asyncMessages = GetMessagesAsync(messages);
var reader = NSubstitute.Substitute.For <ChannelReader <DummyMessage> >();
reader.ReadAllAsync()
.ReturnsForAnyArgs(asyncMessages);
var logger = NSubstitute.Substitute.For <ILogger <InMemorySubscriber <DummyMessage> > >();
var sut = new InMemorySubscriber <DummyMessage>(processor, reader, logger);
await sut.StartAsync();
foreach (var message in messages)
{
await processor.Received(1).ProcessAsync(message);
}
}