Added a getter for middlewares to enable introspection.

src/Bus/Middleware/MessageBusSupportingMiddleware.php

@@ -31,6 +31,17 @@ public function appendMiddleware(MessageBusMiddleware $middleware)
         $this->middlewares[] = $middleware;
     }
 
+    /**
+     * Returns a list of middlewares. Should only be used for introspection.
+     *
+     * @private
+     * @return array<MessageBusMiddleware>
+     */
+    public function getMiddlewares()
+    {
+        return $this->middlewares;
+    }
+
     /**
      * Prepends new middleware for this message bus. Should only be used at configuration time.
      *

tests/Bus/MessageBusSupportingMiddlewareTest.php

@@ -76,6 +76,21 @@ public function it_can_prepend_middleware()
         $this->assertSame($appended, $actualMessageBusesCalled[1]);
     }
 
+    /**
+     * @test
+     */
+    public function it_can_return_an_array_with_its_middlewares()
+    {
+        $stackedMessageBuses = [
+            $this->getMock('SimpleBus\Message\Bus\Middleware\MessageBusMiddleware'),
+            $this->getMock('SimpleBus\Message\Bus\Middleware\MessageBusMiddleware')
+        ];
+
+        $messageBusStack = new MessageBusSupportingMiddleware($stackedMessageBuses);
+
+        $this->assertEquals($stackedMessageBuses, $messageBusStack->getMiddlewares());
+    }
+
     private function mockStackedMessageBus(&$actualMessageBusesCalled)
     {
         $messageBus = $this->getMock('SimpleBus\Message\Bus\Middleware\MessageBusMiddleware');