Add test coverate for grafana.py

Previous to this we actually didn't install our requests dependency.
So grafyaml actually didn't work :( Now we have basic coverage with
mock.

Change-Id: I771ea12e444ea851d76983df75f69d1569653f9d
Signed-off-by: Paul Belanger <pabelanger@redhat.com>

requirements.txt

@@ -5,4 +5,5 @@
 oslo.config>=1.11.0
 oslo.log>=1.0.0,<1.1.0
 PyYAML>=3.1.0
+requests
 voluptuous>=0.7

test-requirements.txt

@@ -7,6 +7,7 @@ hacking<0.11,>=0.10.0
 coverage>=3.6
 discover
 python-subunit>=0.0.18
+requests-mock>=0.6.0
 sphinx>=1.1.2,!=1.2.0,!=1.3b1,<1.3
 oslosphinx>=2.2.0  # Apache-2.0
 oslotest>=1.2.0  # Apache-2.0

tests/test_grafana.py

@@ -0,0 +1,46 @@
+# Copyright 2015 Red Hat, Inc.
+#
+# 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.
+
+from requests_mock.contrib import fixture as rm_fixture
+from testtools import TestCase
+
+from grafana_dashboards import grafana
+
+
+class TestCaseGrafana(TestCase):
+
+    def setUp(self):
+        super(TestCaseGrafana, self).setUp()
+        self.apikey = 'eyJrIjoiT0tTcG1pUlY2RnVKZTFVaDFsNFZXdE9ZWmNrMkZYbk'
+        self.url = 'http://localhost'
+        self.grafana = grafana.Grafana(self.url, self.apikey)
+
+    def test_create_dashboard(self):
+        mock_requests = self.useFixture(rm_fixture.Fixture())
+        mock_requests.post('/api/dashboards/db')
+        data = {
+            "dashboard": {
+                "title": "New dashboard",
+            }
+        }
+        self.grafana.create_dashboard(data)
+        self.assertEqual(mock_requests.call_count, 1)
+        headers = mock_requests.last_request.headers
+        self._test_headers(headers)
+
+    def _test_headers(self, headers):
+        self.assertIn('Authorization', headers)
+        self.assertEqual(headers['Authorization'], 'Bearer %s' % self.apikey)
+        self.assertIn('Content-Type', headers)
+        self.assertEqual(headers['Content-Type'], 'application/json')