From 1e9b5c15ecc165e6d7658a6db13de98560f2b8df Mon Sep 17 00:00:00 2001
From: Ivan Studinsky <ivan.studinsky@saritasa.com>
Date: Sat, 15 Jun 2024 15:00:28 +0700
Subject: [PATCH] Provide tests for hashing of `OperandHolder` (#9437)

---
 tests/test_permissions.py | 56 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 56 insertions(+)

diff --git a/tests/test_permissions.py b/tests/test_permissions.py
index aefff981e..39b7ed662 100644
--- a/tests/test_permissions.py
+++ b/tests/test_permissions.py
@@ -716,3 +716,59 @@ class PermissionsCompositionTests(TestCase):
         composed_perm = (IsAuthenticatedUserOwner | permissions.IsAdminUser)
         hasperm = composed_perm().has_object_permission(request, None, None)
         assert hasperm is False
+
+    def test_operand_holder_is_hashable(self):
+        assert hash((permissions.IsAuthenticated & permissions.IsAdminUser))
+
+    def test_operand_holder_hash_same_for_same_operands_and_operator(self):
+        first_operand_holder = (
+            permissions.IsAuthenticated & permissions.IsAdminUser
+        )
+        second_operand_holder = (
+            permissions.IsAuthenticated & permissions.IsAdminUser
+        )
+
+        assert hash(first_operand_holder) == hash(second_operand_holder)
+
+    def test_operand_holder_hash_differs_for_different_operands(self):
+        first_operand_holder = (
+            permissions.IsAuthenticated & permissions.IsAdminUser
+        )
+        second_operand_holder = (
+            permissions.AllowAny & permissions.IsAdminUser
+        )
+        third_operand_holder = (
+            permissions.IsAuthenticated & permissions.AllowAny
+        )
+
+        assert hash(first_operand_holder) != hash(second_operand_holder)
+        assert hash(first_operand_holder) != hash(third_operand_holder)
+        assert hash(second_operand_holder) != hash(third_operand_holder)
+
+    def test_operand_holder_hash_differs_for_different_operators(self):
+        first_operand_holder = (
+            permissions.IsAuthenticated & permissions.IsAdminUser
+        )
+        second_operand_holder = (
+            permissions.IsAuthenticated | permissions.IsAdminUser
+        )
+
+        assert hash(first_operand_holder) != hash(second_operand_holder)
+
+    def test_filtering_permissions(self):
+        unfiltered_permissions = [
+            permissions.IsAuthenticated & permissions.IsAdminUser,
+            permissions.IsAuthenticated & permissions.IsAdminUser,
+            permissions.AllowAny,
+        ]
+        expected_permissions = [
+            permissions.IsAuthenticated & permissions.IsAdminUser,
+            permissions.AllowAny,
+        ]
+
+        filtered_permissions = [
+            perm for perm
+            in dict.fromkeys(unfiltered_permissions)
+        ]
+
+        assert filtered_permissions == expected_permissions