adding test for callbacks

tests/server/test_tunnel.py

@@ -21,3 +21,25 @@ def test_get_by_hostname(self):
         tunnel.destroy()
 
         Tunnel.domain_suffix = None
+
+    def test_tunnel_callbacks(self):
+        Tunnel.domain_suffix = 'bar'
+        self.create_called = False
+        self.destroy_called = False
+
+        def create_callback(tunnel):
+            self.assertEquals(tunnel.name, "foo")
+            self.create_called = True
+
+        def destroy_callback(tunnel):
+            self.assertEquals(tunnel.name, "foo")
+            self.destroy_called = True
+
+        Tunnel.create_callback = create_callback
+        Tunnel.destroy_callback = destroy_callback
+
+        tunnel = Tunnel.create(dict(name='foo', client='Test-Client'))
+        tunnel.destroy()
+
+        self.assertTrue(self.create_called)
+        self.assertTrue(self.destroy_called)