Added a test for (and made corrections to) invalid callback exception.

Author: boenrobot

src/PEAR2/Net/RouterOS/Client.php

@@ -264,19 +264,20 @@ public function sendAsync(Request $request, $callback = null)
                 10501
             );
         }
+        if (null !== $callback && !is_callable($callback, true)) {
+            throw new UnexpectedValueException(
+                'Invalid callback provided.', 10502
+            );
+        }
 
         $this->send($request);
 
         if (null === $callback) {
             //Register the request at the buffer
             $this->responseBuffer[$tag] = array();
-        } elseif (is_callable($callback, true)) {
+        } else {
             //Prepare the callback
             $this->callbacks[$tag] = $callback;
-        } else {
-            throw new UnexpectedValueException(
-                'Invalid callback provided.', 10502
-            );
         }
         return $this;
     }

tests/ClientFeaturesTest.php

@@ -135,6 +135,22 @@ public function testSendAsyncUniqueTagRequirement()
         }
     }
 
+    public function testSendAsyncValidCallbackRequirement()
+    {
+        $ping = new Request('/ping');
+        $ping->setArgument('address', HOSTNAME_INVALID);
+        $ping->setTag('ping');
+        try {
+            $this->object->sendAsync($ping, 3);
+
+            $this->fail('The call had to fail.');
+        } catch (UnexpectedValueException $e) {
+            $this->assertEquals(
+                10502, $e->getCode(), 'Improper exception code.'
+            );
+        }
+    }
+
     public function testSendAsyncWithCallbackAndTempLoop()
     {
         $ping = new Request('/ping');