From dfb4e68e005e68a2e272f92c62fc8455712f293a Mon Sep 17 00:00:00 2001
From: Aditi Raveesh <aditirav@thoughtworks.com>
Date: Tue, 14 May 2013 15:33:14 +0530
Subject: Add Middleware for correlation_id

The middleware generates the 'correlation_id' if it is not already present
in the request header. This 'correlation_id' can be used to enable more
effective debugging of requests that span multiple services.

Implements: blueprint create-a-unified-correlation-id

Change-Id: Ibc06a5b05b628e0b640e9299c79127ecbf9c684e
---
 tests/unit/middleware/test_correlation_id.py | 51 ++++++++++++++++++++++++++++
 1 file changed, 51 insertions(+)
 create mode 100644 tests/unit/middleware/test_correlation_id.py

(limited to 'tests')

diff --git a/tests/unit/middleware/test_correlation_id.py b/tests/unit/middleware/test_correlation_id.py
new file mode 100644
index 0000000..070c23e
--- /dev/null
+++ b/tests/unit/middleware/test_correlation_id.py
@@ -0,0 +1,51 @@
+# vim: tabstop=4 shiftwidth=4 softtabstop=4
+
+# Copyright (c) 2013 Rackspace Hosting
+# All Rights Reserved.
+#
+#    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.
+
+import mock
+
+from openstack.common.middleware import correlation_id
+from openstack.common import uuidutils
+from tests import utils
+
+
+class CorrelationIdMiddlewareTest(utils.BaseTestCase):
+
+    def test_process_request(self):
+        app = mock.Mock()
+        req = mock.Mock()
+        req.headers = {}
+        original_method = uuidutils.generate_uuid
+        mock_generate_uuid = mock.Mock()
+        mock_generate_uuid.return_value = "fake_uuid"
+        uuidutils.generate_uuid = mock_generate_uuid
+
+        middleware = correlation_id.CorrelationIdMiddleware(app)
+        middleware(req)
+        uuidutils.generate_uuid = original_method
+
+        self.assertEquals(req.headers.get("X_CORRELATION_ID"), "fake_uuid")
+
+    def test_process_request_should_not_regenerate_correlation_id(self):
+        app = mock.Mock()
+        req = mock.Mock()
+        req.headers = {"X_CORRELATION_ID": "correlation_id"}
+
+        middleware = correlation_id.CorrelationIdMiddleware(app)
+        middleware(req)
+
+        self.assertEquals(req.headers.get("X_CORRELATION_ID"),
+                          "correlation_id")
-- 
cgit