public async Task when_publishing_inception_message_it_should_assign_proper_message_ids()
{
var messageRouter = new FakeMessageRouter();
var sut = new VentureMessagePublisher(messageRouter);
var message = new object();
await sut.PublishInceptionMessage(message, DateTimeOffset.UtcNow);
messageRouter.Message.Should().BeSameAs(message, "it should pass message without changes");
messageRouter.MessageId.Should().NotBeNullOrWhiteSpace("it should generate message ID");
messageRouter.CorrelationId.Should().Be(messageRouter.MessageId, "correlation ID and message ID should be the same");
messageRouter.CausationId.Should().Be(messageRouter.MessageId, "causation ID and message ID should be the same");
}
public async Task when_publishing_subsequent_message_it_should_assign_proper_message_ids()
{
var messageRouter = new FakeMessageRouter();
var sut = new VentureMessagePublisher(messageRouter);
var message = new object();
var correlationId = _stringCreator.Get(length: 10);
var precedingMessageId = _stringCreator.Get(length: 10);
await sut.PublishSubsequentMessage(
message,
DateTimeOffset.UtcNow,
correlationId,
precedingMessageId);
messageRouter.Message.Should().BeSameAs(message, "it should pass message without changes");
messageRouter.MessageId.Should().NotBeNullOrWhiteSpace("it should generate message ID");
messageRouter.CorrelationId.Should().Be(correlationId, "it should pass correlation ID without changes");
messageRouter.CausationId.Should().Be(precedingMessageId, "it should use preceding message ID as causation ID");
}
public async Task when_message_id_is_not_specified_it_should_generate_it()
{
var messageRouter = new FakeMessageRouter();
var sut = new VentureMessagePublisher(messageRouter);
var message = new object();
var correlationId = _stringCreator.Get(length: 10);
var causationId = _stringCreator.Get(length: 10);
var messageId = _stringCreator.Get(length: 10);
await sut.Publish(
message,
new VentureOutgoingMessageHandlingContext(
message,
DateTimeOffset.UtcNow,
correlationId,
causationId,
messageId));
messageRouter.Message.Should().BeSameAs(message, "it should pass message without changes");
messageRouter.CorrelationId.Should().BeSameAs(correlationId, "it should pass correlation ID without changes");
messageRouter.CausationId.Should().BeSameAs(causationId, "it should pass causation ID without changes");
messageRouter.MessageId.Should().NotBeNullOrWhiteSpace("message ID should be generated");
}
public async Task when_publishing_message_it_should_route_it_using_message_router_with_parameters_unchanged()
{
var messageRouter = new FakeMessageRouter();
var sut = new VentureMessagePublisher(messageRouter);
var message = new object();
var correlationId = _stringCreator.Get(length: 10);
var causationId = _stringCreator.Get(length: 10);
var messageId = _stringCreator.Get(length: 10);
await sut.Publish(
message,
new VentureOutgoingMessageHandlingContext(
message,
DateTimeOffset.UtcNow,
correlationId,
causationId,
messageId));
messageRouter.Message.Should().BeSameAs(message, "it should pass message without changes");
messageRouter.CorrelationId.Should().BeSameAs(correlationId, "it should pass correlation ID without changes");
messageRouter.CausationId.Should().BeSameAs(causationId, "it should pass causation ID without changes");
messageRouter.MessageId.Should().BeSameAs(messageId, "it should pass message ID without changes");
}
public void when_publishing_subsequent_message_with_some_attribute_not_specified_it_should_fail()
{
var messageRouter = new FakeMessageRouter();
var publisher = new VentureMessagePublisher(messageRouter);
var message = new object();
var correlationId = _stringCreator.Get(length: 10);
var precedingMessageId = _stringCreator.Get(length: 10);
var generatedOnUtc = DateTimeOffset.UtcNow;
Func <Task> sut = () => publisher.PublishSubsequentMessage <object>(
message: null,
generatedOnUtc,
correlationId,
precedingMessageId);
sut.Should().Throw <ArgumentNullException>().Where(exception => exception.ParamName.Equals("message"));
sut = () => publisher.PublishSubsequentMessage(
message,
generatedOnUtc,
correlationId: null,
precedingMessageId);
sut.Should().Throw <ArgumentNullException>().Where(
exception => exception.ParamName.Equals("correlationId"),
"null is not valid correlation ID");
sut = () => publisher.PublishSubsequentMessage(
message,
generatedOnUtc,
string.Empty,
precedingMessageId);
sut.Should().Throw <ArgumentNullException>().Where(
exception => exception.ParamName.Equals("correlationId"),
"an empty string is not valid correlation ID");
sut = () => publisher.PublishSubsequentMessage(
message,
generatedOnUtc,
WhitespaceString,
precedingMessageId);
sut.Should().Throw <ArgumentNullException>().Where(
exception => exception.ParamName.Equals("correlationId"),
"a whitespace string is not valid correlation ID");
sut = () => publisher.PublishSubsequentMessage(
message,
generatedOnUtc,
correlationId,
precedingMessageId: null);
sut.Should().Throw <ArgumentNullException>().Where(
exception => exception.ParamName.Equals("precedingMessageId"),
"null is not valid preceding message ID");
sut = () => publisher.PublishSubsequentMessage(
message,
generatedOnUtc,
correlationId,
string.Empty);
sut.Should().Throw <ArgumentNullException>().Where(
exception => exception.ParamName.Equals("precedingMessageId"),
"an empty string is not valid preceding message ID");
sut = () => publisher.PublishSubsequentMessage(
message,
generatedOnUtc,
correlationId,
WhitespaceString);
sut.Should().Throw <ArgumentNullException>().Where(
exception => exception.ParamName.Equals("precedingMessageId"),
"a whitespace string is not valid preceding message ID");
}
