public void Should_declare_exchange_again_if_first_attempt_failed()
{
var exchangeDeclareCount = 0;
var advancedBus = MockRepository.GenerateStrictMock<IAdvancedBus>();
IExchange exchange = new Exchange(exchangeName);
advancedBus
.Expect(x => x.ExchangeDeclare(exchangeName, "topic"))
.Throw(new Exception())
.WhenCalled(x => exchangeDeclareCount++);
advancedBus
.Expect(x => x.ExchangeDeclare(exchangeName, "topic"))
.Return(exchange)
.WhenCalled(x => exchangeDeclareCount++);
var publishExchangeDeclareStrategy = new VersionedPublishExchangeDeclareStrategy();
try
{
publishExchangeDeclareStrategy.DeclareExchange(advancedBus, exchangeName, ExchangeType.Topic);
}
catch (Exception)
{
}
var declaredExchange = publishExchangeDeclareStrategy.DeclareExchange(advancedBus, exchangeName, ExchangeType.Topic);
advancedBus.AssertWasCalled(x => x.ExchangeDeclare(exchangeName, "topic"));
advancedBus.AssertWasCalled(x => x.ExchangeDeclare(exchangeName, "topic"));
declaredExchange.ShouldBeTheSameAs(exchange);
exchangeDeclareCount.ShouldEqual(1);
}
public void When_declaring_exchanges_for_unversioned_message_one_exchange_created()
{
var exchanges = new List<ExchangeStub>();
var bus = CreateAdvancedBusMock( exchanges.Add, BindExchanges, t => t.Name );
var publishExchangeStrategy = new VersionedPublishExchangeDeclareStrategy();
publishExchangeStrategy.DeclareExchange( bus, typeof( MyMessage ), ExchangeType.Topic );
Assert.That( exchanges, Has.Count.EqualTo( 1 ), "Single exchange should have been created" );
Assert.That( exchanges[ 0 ].Name, Is.EqualTo( "MyMessage" ), "Exchange should have used naming convection to name the exchange" );
Assert.That( exchanges[ 0 ].BoundTo, Is.Null, "Unversioned message should not create any exchange to exchange bindings" );
}
public void When_declaring_exchanges_for_versioned_message_exchange_per_version_created_and_bound_to_superceding_version()
{
var exchanges = new List<ExchangeStub>();
var bus = CreateAdvancedBusMock( exchanges.Add, BindExchanges, t => t.Name );
var publishExchangeStrategy = new VersionedPublishExchangeDeclareStrategy();
publishExchangeStrategy.DeclareExchange( bus, typeof( MyMessageV2 ), ExchangeType.Topic );
Assert.That( exchanges, Has.Count.EqualTo( 2 ), "Two exchanges should have been created" );
Assert.That( exchanges[ 0 ].Name, Is.EqualTo( "MyMessage" ), "Superseded message exchange should been created first" );
Assert.That( exchanges[ 1 ].Name, Is.EqualTo( "MyMessageV2" ), "Superseding message exchange should been created second" );
Assert.That( exchanges[ 1 ].BoundTo, Is.EqualTo( exchanges[ 0 ] ), "Superseding message exchange should route message to superseded exchange" );
Assert.That( exchanges[ 0 ].BoundTo, Is.Null, "Superseded message exchange should route messages anywhere" );
}