Use context managers for patching in test_executionmocking.py

Author: LuKrO2011

tests/testcase/execution/test_executionmocking.py

@@ -25,25 +25,24 @@ def test_make_deterministic_reseeds_tracked_instances():
     config.configuration.seeding.seed = 99
     mock_inst = MagicMock(spec=random.Random)  # noqa: S311
     tracked: weakref.WeakSet = weakref.WeakSet([mock_inst])
-    orig_seed = random.Random.seed
-    try:
+    with (
+        mock.patch("random.Random.seed"),
+        mock.patch("random.seed"),
+    ):
         random.Random.seed.__pynguin_instances__ = tracked
-        with mock.patch("random.seed"):
-            execution._make_deterministic()
-        mock_inst.seed.assert_called_once_with(99)
-    finally:
-        random.Random.seed = orig_seed
+        execution._make_deterministic()
+    mock_inst.seed.assert_called_once_with(99)
 
 
 def test_make_deterministic_excludes_pynguin_rng():
     """Pynguin's own RNG must not be reseeded by _make_deterministic."""
     config.configuration.seeding.seed = 7
     tracked: weakref.WeakSet = weakref.WeakSet([_rnd.RNG])
-    orig_seed = random.Random.seed
-    try:
+    with (
+        mock.patch("random.Random.seed"),
+        mock.patch.object(_rnd.RNG, "seed") as rng_seed_mock,
+        mock.patch("random.seed"),
+    ):
         random.Random.seed.__pynguin_instances__ = tracked
-        with mock.patch.object(_rnd.RNG, "seed") as rng_seed_mock, mock.patch("random.seed"):
-            execution._make_deterministic()
-        rng_seed_mock.assert_not_called()
-    finally:
-        random.Random.seed = orig_seed
+        execution._make_deterministic()
+    rng_seed_mock.assert_not_called()