Make Graphene enums iterable like Python enums

graphene/tests/issues/test_1264.py

@@ -0,0 +1,13 @@
+from graphene.types.enum import Enum
+
+
+def test_enum_iteration():
+    class TestEnum(Enum):
+        FIRST = 1
+        SECOND = 2
+
+    result = []
+    expected_values = ["FIRST", "SECOND"]
+    for c in TestEnum:
+        result.append(c.name)
+    assert result == expected_values

graphene/types/enum.py

@@ -56,6 +56,9 @@ class EnumMeta(SubclassWithMeta_Meta):
         return super(EnumMeta, cls).__call__(*args, **kwargs)
         # return cls._meta.enum(*args, **kwargs)
 
+    def __iter__(cls):
+        return cls._meta.enum.__iter__()
+
     def from_enum(
         cls, enum, name=None, description=None, deprecation_reason=None
     ):  # noqa: N805