chore: test to demonstrate bug

#1252

Author: dopry

tests/test_authorization_code.py

@@ -1308,6 +1308,27 @@ def test_request_body_params(self):
         self.assertEqual(content["scope"], "read write")
         self.assertEqual(content["expires_in"], self.oauth2_settings.ACCESS_TOKEN_EXPIRE_SECONDS)
 
+    def test_request_body_params_client_typo(self):
+        """
+        Request an access token using client_type: public
+        """
+        self.client.login(username="test_user", password="123456")
+        authorization_code = self.get_auth()
+
+        token_request_data = {
+            "grant_type": "authorization_code",
+            "code": authorization_code,
+            "redirect_uri": "http://example.org",
+            "client": self.application.client_id,
+            "client_secret": CLEARTEXT_SECRET,
+        }
+
+        response = self.client.post(reverse("oauth2_provider:token"), data=token_request_data)
+        self.assertEqual(response.status_code, 401)
+
+        content = json.loads(response.content.decode("utf-8"))
+        self.assertEqual(content["error"], "invalid_client")
+
     def test_public(self):
         """
         Request an access token using client_type: public