make sure that the defattrname is set properly..

bitelab/__init__.py

@@ -834,6 +834,8 @@ class TestAttrs(unittest.IsolatedAsyncioTestCase):
 		data = 'somepath'
 		sc = SerialConsole(data)
 
+		self.assertEqual(sc.defattrname, 'console')
+
 		self.assertEqual(data, await sc.getvalue())
 
 		with self.assertRaises(TypeError):