Add unit test for  availability_zone_client

This patch adds unit test for availability_zone_client.

Change-Id: I9f043f0cf864773cbd15c23f776487a729c09692
diff --git a/tempest/tests/services/compute/test_availability_zone_client.py b/tempest/tests/services/compute/test_availability_zone_client.py
new file mode 100644
index 0000000..64efd08
--- /dev/null
+++ b/tempest/tests/services/compute/test_availability_zone_client.py
@@ -0,0 +1,61 @@
+# Copyright 2015 NEC Corporation.  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 httplib2
+
+from oslo_serialization import jsonutils as json
+from oslotest import mockpatch
+
+from tempest.services.compute.json import availability_zone_client
+from tempest.tests import base
+from tempest.tests import fake_auth_provider
+
+
+class TestAvailabilityZoneClient(base.TestCase):
+
+    FAKE_AVAILABIRITY_ZONE_INFO = [
+        {
+            "zoneState": {
+                "available": True
+            },
+            "hosts": None,
+            "zoneName": u'\xf4'
+        }
+    ]
+
+    def setUp(self):
+        super(TestAvailabilityZoneClient, self).setUp()
+        fake_auth = fake_auth_provider.FakeAuthProvider()
+        self.client = availability_zone_client.AvailabilityZoneClient(
+            fake_auth, 'compute', 'regionOne')
+
+    def _test_list_availability_zones(self, bytes_body=False):
+        serialized_body = json.dumps({
+            "availabilityZoneInfo": self.FAKE_AVAILABIRITY_ZONE_INFO})
+        if bytes_body:
+            serialized_body = serialized_body.encode('utf-8')
+
+        mocked_resp = (httplib2.Response({'status': 200}), serialized_body)
+        self.useFixture(mockpatch.Patch(
+            'tempest.common.service_client.ServiceClient.get',
+            return_value=mocked_resp))
+        resp = self.client.list_availability_zones()
+        self.assertEqual({
+            "availabilityZoneInfo": self.FAKE_AVAILABIRITY_ZONE_INFO}, resp)
+
+    def test_list_availability_zones_with_str_body(self):
+        self._test_list_availability_zones()
+
+    def test_list_availability_zones_with_bytes_body(self):
+        self._test_list_availability_zones(bytes_body=True)