Add api app unit test

Change-Id: Ie9e9b0fa39c672c430234172cf213eaca191aa1e
Closes-Bug: #1808921

mogan/tests/unit/api/test_app.py

@@ -0,0 +1,41 @@
+#
+#    Licensed under the Apache License, Version 2.0 (the "License"); you may
+#    not use this file except in compliance with the License. You may obtain
+#    a copy of the License at
+#
+#         http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+#    License for the specific language governing permissions and limitations
+#    under the License.
+
+"""Tests for the Pecan API app."""
+
+
+import mock
+from pecan import hooks
+
+from mogan.api import app
+from mogan.api.controllers.root import RootController
+from mogan.engine import api as engineapi
+from mogan.tests import base
+
+
+class TestHook(hooks.PecanHook):
+    pass
+
+
+class TestApplication(base.TestCase):
+    @mock.patch.object(engineapi, 'API')
+    def test_setup_app(self, mock_api):
+        moganapp = app.setup_app()
+        self.assertIsInstance(moganapp._mogan_app.application.app.root,
+                              RootController)
+
+    @mock.patch.object(engineapi, 'API')
+    def test_setup_app_with_extra_hooks(self, mock_api):
+        testhook = TestHook()
+        moganapp = app.setup_app(extra_hooks=[testhook])
+        self.assertIn(testhook, moganapp._mogan_app.application.app.hooks)