added test for unequal tail/head for loops

MaineKuehn · Jul 26, 2018 · acac060 · acac060
1 parent b6866f2
commit acac060
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/graphi_unittests/test_edge.py b/graphi_unittests/test_edge.py
@@ -43,3 +43,6 @@ def test_representation(self):
 class TestLoop(unittest.TestCase):
     def test_init(self):
         self.assertEquals(Loop("start"), Edge("start", "start"))
+
+        with self.assertRaises(ValueError):
+            Loop("start", "stop")