Fix tests on python 3.4 (#1046)

gns3server/controller/gns3vm/__init__.py

@@ -287,7 +287,7 @@ class GNS3VM:
                 yield from engine.start()
             except Exception as e:
                 yield from self._controller.delete_compute("vm")
-                log.error("Can't start the GNS3 VM: {}", str(e))
+                log.error("Can't start the GNS3 VM: {}".format(str(e)))
                 yield from compute.update(name="GNS3 VM ({})".format(engine.vmname))
                 raise e
             yield from compute.update(name="GNS3 VM ({})".format(engine.vmname),

tests/utils.py

@@ -70,7 +70,10 @@ class AsyncioMagicMock(unittest.mock.MagicMock):
     """
     Magic mock returning coroutine
     """
-    __class__ = types.CoroutineType
+    try:
+        __class__ = types.CoroutineType
+    except AttributeError:  # Not supported with Python 3.4
+        __class__ = types.GeneratorType
 
     def __init__(self, return_value=None, return_values=None, **kwargs):
         """