Fix handler_factory_test to avoid kokoro failures.

PiperOrigin-RevId: 260254635

tfx/tools/cli/handler/handler_factory_test.py

@@ -18,6 +18,7 @@
 from __future__ import print_function
 
 import os
+import sys
 import tempfile
 
 import mock
@@ -27,7 +28,6 @@
 from tfx.tools.cli.handler import airflow_handler
 from tfx.tools.cli.handler import beam_handler
 from tfx.tools.cli.handler import handler_factory
-from tfx.tools.cli.handler import kubeflow_handler
 
 
 class _MockClientClass(object):
@@ -42,6 +42,7 @@ class HandlerFactoryTest(tf.test.TestCase):
   def setUp(self):
     super(HandlerFactoryTest, self).setUp()
     self.flags_dict = {}
+    sys.modules['kfp'] = mock.Mock()
 
   def test_create_handler_airflow(self):
     self.flags_dict[labels.ENGINE_FLAG] = 'airflow'
@@ -57,6 +58,7 @@ def test_create_handler_kubeflow(self):
         labels.IAP_CLIENT_ID: 'dummyID',
         labels.NAMESPACE: 'kubeflow',
     }
+    from tfx.tools.cli.handler import kubeflow_handler  # pylint: disable=g-import-not-at-top
     self.assertIsInstance(
         handler_factory.create_handler(flags_dict),
         kubeflow_handler.KubeflowHandler)