test: add test

graphene/relay/tests/test_connection.py

@@ -299,3 +299,20 @@ def test_connectionfield_required():
     executed = schema.execute("{ testConnection { edges { cursor } } }")
     assert not executed.errors
     assert executed.data == {"testConnection": {"edges": []}}
+
+
+def test_connectionfield_strict_types():
+    class MyObjectConnection(Connection):
+        class Meta:
+            node = MyObject
+            strict_types = True
+
+    connection_field = ConnectionField(MyObjectConnection)
+    edges_field_type = connection_field.type._meta.fields["edges"].type
+    assert isinstance(edges_field_type, NonNull)
+
+    edges_list_element_type = edges_field_type.of_type.of_type
+    assert isinstance(edges_list_element_type, NonNull)
+
+    node_field = edges_list_element_type.of_type._meta.fields["node"]
+    assert isinstance(node_field.type, NonNull)