Update how APITestCase's client is set for django>=5.2 compatibility

Author: andres-holvi

test_plus/test.py

@@ -375,10 +375,11 @@ def __init__(self, *args, **kwargs):
 
 
 class APITestCase(TestCase):
-    def __init__(self, *args, **kwargs):
-        self.client_class = get_api_client()
-        super(APITestCase, self).__init__(*args, **kwargs)
 
+    def setUp(self):
+        super(APITestCase, self).setUp()
+        api_client_class = get_api_client()
+        self.client = api_client_class()
 
 # Note this class inherits from TestCase defined above.
 class CBVTestCase(TestCase):

test_project/test_app/tests/test_unittests.py

@@ -684,6 +684,10 @@ def test_get_with_non_primitive_data_type(self):
         assert response["content-type"] == "application/json"
         self.response_200()
 
+    def test_force_authenticate(self):
+        u1 = self.make_user()
+        self.client.force_authenticate(u1)
+
 
 # pytest tests
 def test_tp_loads(tp):