Add tests for operators

1 files changed, 27 insertions, 0 deletions

diff --git a/test/test_graph_operator.py b/test/test_graph_operator.py
new file mode 100644
index 00000000..87502c54
--- /dev/null
+++ b/test/test_graph_operator.py
@@ -0,0 +1,27 @@
+from rdflib import Graph
+
+
+class MyGraph(Graph):
+    def my_method(self):
+        pass
+
+
+def test_subclass_add_operator():
+    g = MyGraph()
+
+    g = g + g
+    assert "my_method" in dir(g)
+
+
+def test_subclass_sub_operator():
+    g = MyGraph()
+
+    g = g - g
+    assert "my_method" in dir(g)
+
+
+def test_subclass_mul_operator():
+    g = MyGraph()
+
+    g = g * g
+    assert "my_method" in dir(g)