Description: Fix for errors with Python 3.12 and Flask 3.0.
 Fix for AttributeError in test with Python 3.12 + removed deprecated
 signals_available.
Author: Yogeswaran Umasankar <kd8mbd@gmail.com>
Last-Update: 2024-02-12

--- a/tests/test_api.py
+++ b/tests/test_api.py
@@ -1,7 +1,7 @@
 import unittest
 import json
 from flask import Flask, Blueprint, redirect, views, abort as flask_abort
-from flask.signals import got_request_exception, signals_available
+from flask.signals import got_request_exception
 try:
     from mock import Mock
 except:
@@ -491,10 +491,6 @@ class APITestCase(unittest.TestCase):
         self.assertEqual(api.default_mediatype, resp.headers['Content-Type'])
 
     def test_handle_error_signal(self):
-        if not signals_available:
-            # This test requires the blinker lib to run.
-            print("Can't test signals without signal support")
-            return
         app = Flask(__name__)
         api = flask_restful.Api(app)
 
@@ -531,15 +527,14 @@ class APITestCase(unittest.TestCase):
         """
         app = Flask(__name__)
         api = flask_restful.Api(app)
-        app.handle_exception = Mock()
+        original_handle_exception = app.handle_exception
         api.handle_error = Mock(side_effect=Exception())
         api._has_fr_route = Mock(return_value=True)
         exception = Mock(spec=HTTPException)
 
         with app.test_request_context('/foo'):
-            api.error_router(exception, app.handle_exception)
-
-        self.assertTrue(app.handle_exception.called_with(exception))
+            original_handle_exception(exception)
+        api.handle_error.assert_called_once_with(exception)
 
     def test_media_types(self):
         app = Flask(__name__)