Add test for invalid header

Author: dorsha

tests/test_auth.py

@@ -679,6 +679,35 @@ def test_api_rate_limit_exception(self):
                 {API_RATE_LIMIT_RETRY_AFTER_HEADER: 10},
             )
 
+    def test_api_rate_limit_invalid_header(self):
+        auth = Auth(self.dummy_project_id, self.public_key_dict)
+
+        # Test do_post empty body
+        with patch("requests.post") as mock_request:
+            mock_request.return_value.ok = False
+            mock_request.return_value.status_code = 429
+            mock_request.return_value.json.return_value = {
+                "errorCode": "E130429",
+                "errorDescription": "https://docs.descope.com/rate-limit",
+                "errorMessage": "API rate limit exceeded.",
+            }
+            mock_request.return_value.headers = {
+                API_RATE_LIMIT_RETRY_AFTER_HEADER: "hello"
+            }
+            with self.assertRaises(RateLimitException) as cm:
+                auth.do_post("http://test.com", {}, None, None)
+            the_exception = cm.exception
+            self.assertEqual(the_exception.status_code, "E130429")
+            self.assertEqual(the_exception.error_type, ERROR_TYPE_API_RATE_LIMIT)
+            self.assertEqual(
+                the_exception.error_description, "https://docs.descope.com/rate-limit"
+            )
+            self.assertEqual(the_exception.error_message, "API rate limit exceeded.")
+            self.assertEqual(
+                the_exception.rate_limit_parameters,
+                {API_RATE_LIMIT_RETRY_AFTER_HEADER: 0},
+            )
+
     def test_api_rate_limit_invalid_response_body(self):
         auth = Auth(self.dummy_project_id, self.public_key_dict)