public async Task VerifyMessageCrossesBridge()
        {
            // Create the source message bus.
            var sourceBus = new MockMessageBus();
            var sourceEntity = Any.String();

            // Create the target message bus.
            var targetBus = new MockMessageBus();
            const string TargetEntity = "TestEventHub";

            // Setup the target callback. This is the output of the bridge.
            var called = false;
            await targetBus.RegisterHandlerAsync(TargetEntity, "TestEventHub", m => Task.Run(() => { called = true; }));
            
            // Create the message bus bridge.
            var bridgeName = Any.String();

            var bridge = new MySimpleMessageBridge();
            await
                bridge.InitializeAsync(
                    new MessageBusBridgeDescription
                        {
                            BridgeName = bridgeName, 
                            SourceBus = sourceBus, 
                            SourceEntity = sourceEntity, 
                            TargetBus = targetBus,
                            TargetEntity = TargetEntity
                        });

            // Send the message.
            var message = new MockMessage
                              {
                                  CorrelationKey = Any.String(),
                                  Message = "{\"Name\":\"TestEventHub\"}", 
                                  MessageKey = Any.String(), 
                                  PartitionKey = Any.String()
                              };
            await sourceBus.SendAsync(sourceEntity, message);

            // Assert that the message reached the other side.
            Assert.IsTrue(called, "The target callback must be called.");

            await bridge.CloseAsync();
        }
        public async Task VerifyMessageCrossesBridge()
        {
            // Create the source message bus.
            var sourceBus    = new MockMessageBus();
            var sourceEntity = Any.String();

            // Create the target message bus.
            var          targetBus    = new MockMessageBus();
            const string TargetEntity = "TestEventHub";

            // Setup the target callback. This is the output of the bridge.
            var called = false;
            await targetBus.RegisterHandlerAsync(TargetEntity, "TestEventHub", m => Task.Run(() => { called = true; }));

            // Create the message bus bridge.
            var bridgeName = Any.String();

            var bridge = new MySimpleMessageBridge();
            await
            bridge.InitializeAsync(
                new MessageBusBridgeDescription
            {
                BridgeName   = bridgeName,
                SourceBus    = sourceBus,
                SourceEntity = sourceEntity,
                TargetBus    = targetBus,
                TargetEntity = TargetEntity
            });

            // Send the message.
            var message = new MockMessage
            {
                CorrelationKey = Any.String(),
                Message        = "{\"Name\":\"TestEventHub\"}",
                MessageKey     = Any.String(),
                PartitionKey   = Any.String()
            };
            await sourceBus.SendAsync(sourceEntity, message);

            // Assert that the message reached the other side.
            Assert.IsTrue(called, "The target callback must be called.");

            await bridge.CloseAsync();
        }