unittests: Catch warning emitted by unconfigured default loader tests

celery/tests/test_loaders.py

@@ -7,7 +7,8 @@ from celery import loaders
 from celery.loaders import base
 from celery.loaders import default
 
-from celery.tests.utils import with_environ
+from celery.tests.compat import catch_warnings
+from celery.tests.utils import with_environ, execute_context
 
 
 class TestLoaders(unittest.TestCase):
@@ -99,11 +100,18 @@ class TestDefaultLoader(unittest.TestCase):
             sys.modules["celery"] = celery
 
     def test_unconfigured_settings(self):
+        context_executed = [False]
 
         class _Loader(default.Loader):
 
             def import_from_cwd(self, name):
                 raise ImportError(name)
 
-        l = _Loader()
-        self.assertEqual(l.conf.CELERY_RESULT_BACKEND, "amqp")
+        def with_catch_warnings(log):
+            l = _Loader()
+            self.assertEqual(l.conf.CELERY_RESULT_BACKEND, "amqp")
+            context_executed[0] = True
+
+        context = catch_warnings(record=True)
+        execute_context(context, with_catch_warnings)
+        self.assertTrue(context_executed[0])