Update test_interface_ixxat.py

Author: MattWoodhead

test/test_interface_ixxat.py

@@ -51,6 +51,18 @@ def setUp(self):
             raise unittest.SkipTest("not available on this platform")
 
     def test_bus_creation(self):
+        try:
+            configs = can.detect_available_configs("ixxat")
+            if configs:
+                for interface_kwargs in configs:
+                    bus = can.Bus(**interface_kwargs)
+                    bus.shutdown()
+            else:
+                raise unittest.SkipTest("No adapters were detected")
+        except can.CanInterfaceNotImplementedError:
+            raise unittest.SkipTest("not available on this platform")
+
+    def test_bus_creation_incorrect_channel(self):
         # non-existent channel -> use arbitrary high value
         with self.assertRaises(can.CanInitializationError):
             can.Bus(interface="ixxat", channel=0xFFFF)