Add response schema validation for volume hosts

This is to add response schema validation for volume
hosts, also to remove the fields check in testcases.
Besides, there are some inconsistencies in volume hosts api ref,
I36486724cc30389d371ec0b18b9b7f96883d193c will fix them.

Change-Id: I512bfc97a1c3d4a508daf580d99fefe2a9ae4e13
partially-implements: blueprint volume-response-schema-validation
diff --git a/tempest/api/volume/admin/test_volume_hosts.py b/tempest/api/volume/admin/test_volume_hosts.py
index 7e53ce8..83c27e1 100644
--- a/tempest/api/volume/admin/test_volume_hosts.py
+++ b/tempest/api/volume/admin/test_volume_hosts.py
@@ -26,13 +26,6 @@
                                 "The count of volume hosts is < 2, "
                                 "response of list hosts is: %s" % hosts)
 
-        # Check elements in volume hosts list
-        host_list_keys = ['service', 'host_name', 'last-update',
-                          'zone', 'service-status', 'service-state']
-        for host in hosts:
-            for key in host_list_keys:
-                self.assertIn(key, host)
-
     @decorators.idempotent_id('21168d57-b373-4b71-a3ac-f2c88f0c5d31')
     def test_show_host(self):
         hosts = self.admin_hosts_client.list_hosts()['hosts']
@@ -53,12 +46,6 @@
                             "all hosts that found are: %s" % hosts)
 
         # Check each cinder-volume host.
-        host_detail_keys = ['project', 'volume_count', 'snapshot_count',
-                            'host', 'total_volume_gb', 'total_snapshot_gb']
         for host in c_vol_hosts:
             host_details = self.admin_hosts_client.show_host(host)['host']
             self.assertNotEmpty(host_details)
-            for detail in host_details:
-                self.assertIn('resource', detail)
-                for key in host_detail_keys:
-                    self.assertIn(key, detail['resource'])
diff --git a/tempest/lib/api_schema/response/volume/hosts.py b/tempest/lib/api_schema/response/volume/hosts.py
new file mode 100644
index 0000000..d4848d5
--- /dev/null
+++ b/tempest/lib/api_schema/response/volume/hosts.py
@@ -0,0 +1,81 @@
+# Copyright 2018 ZTE 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.
+
+from tempest.lib.api_schema.response.compute.v2_1 import parameter_types
+
+show_host = {
+    'status_code': [200],
+    'response_body': {
+        'type': 'object',
+        'properties': {
+            'host': {
+                'type': 'array',
+                'items': {
+                    'type': 'object',
+                    'properties': {
+                        'resource': {
+                            'type': 'object',
+                            'properties': {
+                                'volume_count': {'type': 'string'},
+                                'total_volume_gb': {'type': 'string'},
+                                'total_snapshot_gb': {'type': 'string'},
+                                'project': {'type': 'string'},
+                                'host': {'type': 'string', 'pattern': '.+@.+'},
+                                'snapshot_count': {'type': 'string'},
+                            },
+                            'additionalProperties': False,
+                            'required': ['volume_count', 'total_volume_gb',
+                                         'total_snapshot_gb', 'project',
+                                         'host', 'snapshot_count'],
+                        }
+                    },
+                    'additionalProperties': False,
+                    'required': ['resource']
+                }
+            }
+        },
+        'additionalProperties': False,
+        'required': ['host']
+    }
+}
+
+list_hosts = {
+    'status_code': [200],
+    'response_body': {
+        'type': 'object',
+        'properties': {
+            'hosts': {
+                'type': 'array',
+                'items': {
+                    'type': 'object',
+                    'properties': {
+                        'service-status': {
+                            'enum': ['available', 'unavailable']},
+                        'service': {'type': 'string'},
+                        'zone': {'type': 'string'},
+                        'service-state': {
+                            'enum': ['enabled', 'disabled']},
+                        'host_name': {'type': 'string'},
+                        'last-update': parameter_types.date_time_or_null
+                    },
+                    'additionalProperties': False,
+                    'required': ['service-status', 'service', 'zone',
+                                 'service-state', 'host_name', 'last-update']
+                }
+            }
+        },
+        'additionalProperties': False,
+        'required': ['hosts']
+    }
+}
diff --git a/tempest/lib/services/volume/v3/hosts_client.py b/tempest/lib/services/volume/v3/hosts_client.py
index 8b65805..995e451 100644
--- a/tempest/lib/services/volume/v3/hosts_client.py
+++ b/tempest/lib/services/volume/v3/hosts_client.py
@@ -16,6 +16,7 @@
 from oslo_serialization import jsonutils as json
 from six.moves.urllib import parse as urllib
 
+from tempest.lib.api_schema.response.volume import hosts as schema
 from tempest.lib.common import rest_client
 
 
@@ -35,13 +36,13 @@
 
         resp, body = self.get(url)
         body = json.loads(body)
-        self.expected_success(200, resp.status)
+        self.validate_response(schema.list_hosts, resp, body)
         return rest_client.ResponseBody(resp, body)
 
     def show_host(self, host_name):
         """Show host details."""
         url = 'os-hosts/%s' % host_name
         resp, body = self.get(url)
-        self.expected_success(200, resp.status)
         body = json.loads(body)
+        self.validate_response(schema.show_host, resp, body)
         return rest_client.ResponseBody(resp, body)
diff --git a/tempest/tests/lib/services/volume/v3/test_hosts_client.py b/tempest/tests/lib/services/volume/v3/test_hosts_client.py
index 67ae4fd..401defe 100644
--- a/tempest/tests/lib/services/volume/v3/test_hosts_client.py
+++ b/tempest/tests/lib/services/volume/v3/test_hosts_client.py
@@ -48,7 +48,7 @@
                     "total_volume_gb": "2",
                     "total_snapshot_gb": "0",
                     "project": "(total)",
-                    "host": "fake-host",
+                    "host": "fake-host@rbd",
                     "snapshot_count": "0"
                 }
             },
@@ -58,7 +58,7 @@
                     "total_volume_gb": "2",
                     "total_snapshot_gb": "0",
                     "project": "f21a9c86d7114bf99c711f4874d80474",
-                    "host": "fake-host",
+                    "host": "fake-host@lvm",
                     "snapshot_count": "0"
                 }
             }