Validate get keypair attributes of Nova V2/V3 API

This patch adds the JSON Schema for response of Nova V2 & V3 GET
keypair API and validate the response with added JSON Schema to
block the backward incompatibility change in the future.

The response body of V2 GET keypair API is below:

{
    "keypair": {
        "public_key": "ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDnPe3MJhE
                      wcQNGZpYRaGYTwY9D9L3pr1c+eqJIP99mtrUuqTEp3/YPiAz
                      L0Dem/32WWPOV4DEc27NBMxrpOi9JJBssDq+6UdK5hMIwrZ/
                      6dZt+CPz+76LwxnR1vilVFocis+OC9ddntazV1wrAWGyYL9a
                      83vwcuTV01FJzSNlYV4hni2vxcgQPkbgt+ldYoTmBS9X3W5Qy
                      NrzuG53zHjkYjmz3tjiadZwgffDvjT3SBYWU3kBGy6gxIs5f/
                      wIvZUSUXGorOJNUw6FubMj4sLfE4cbHS6W72xs6bmEhqxyjSL
                      QK5fuHE1MgCCDPTd0vqXdbLnCZr6+l0HLI8lpDhd
                      Generated by Nova\n",
        "name": "test_key",
        "fingerprint": "52:53:dd:89:6a:73:c6:18:87:4b:1e:c1:4c:b8:
                       c3:c9",
        "user_id": "93d29478a2454f418e0b835b8439aa90",
        "deleted": false,
        "created_at": "2014-03-17T06:49:35.000000",
        "updated_at": null,
        "deleted_at": null,
        "id": 1
    }
}

The response body of V3 GET keypair API is below:

{
    "keypair": {
        "public_key": "ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDnPe3MJhE
                      wcQNGZpYRaGYTwY9D9L3pr1c+eqJIP99mtrUuqTEp3/YPiAz
                      pL0Dem/32WWPOV4DEc27NBMxrpOi9JJBssDq+6UdK5hMIwrZ/
                      6dZt+CPz+76LwxnR1vilVFocis+OC9ddntazV1wrAWGyYL9a
                      83vwcuTV01FJzSNlYV4hni2vxcgQPkbgt+ldYoTmBS9X3W5Qy
                      /NrzuG53zHjkYjmz3tjiadZwgffDvjT3SBYWU3kBGy6gxIs5f
                      /wIvZUSUXGorOJNUw6FubMj4sLfE4cbHS6W72xs6bmEhqxyjS
                      LQK5fuHE1MgCCDPTd0vqXdbLnCZr6+l0HLI8lpDhd
                      Generated by Nova\n",
        "name": "test_key",
        "fingerprint": "52:53:dd:89:6a:73:c6:18:87:4b:1e:c1:4c:b8:
                       c3:c9"
    }
}

Partially implements blueprint nova-api-attribute-test

Change-Id: Ie65776ec5f6a42df89c27d868b43c4ce105dd09b
diff --git a/tempest/api_schema/compute/v2/keypairs.py b/tempest/api_schema/compute/v2/keypairs.py
new file mode 100644
index 0000000..3225b0d
--- /dev/null
+++ b/tempest/api_schema/compute/v2/keypairs.py
@@ -0,0 +1,47 @@
+# Copyright 2014 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.
+
+get_keypair = {
+    'status_code': [200],
+    'response_body': {
+        'type': 'object',
+        'properties': {
+            'keypair': {
+                'type': 'object',
+                'properties': {
+                    'public_key': {'type': 'string'},
+                    'name': {'type': 'string'},
+                    'fingerprint': {'type': 'string'},
+                    # NOTE: Now the type of 'user_id' is integer, but here
+                    # allows 'string' also because we will be able to change
+                    # it to 'uuid' in the future.
+                    'user_id': {'type': ['integer', 'string']},
+                    'deleted': {'type': 'boolean'},
+                    'created_at': {'type': 'string'},
+                    'updated_at': {'type': ['string', 'null']},
+                    'deleted_at': {'type': ['string', 'null']},
+                    'id': {'type': 'integer'}
+
+                },
+                # When we run the get keypair API, response body includes
+                # all the above mentioned attributes.
+                # But in Nova API sample file, response body includes only
+                # 'public_key', 'name' & 'fingerprint'. So only 'public_key',
+                # 'name' & 'fingerprint' are defined as 'required'.
+                'required': ['public_key', 'name', 'fingerprint']
+            }
+        },
+        'required': ['keypair']
+    }
+}
diff --git a/tempest/api_schema/compute/v3/keypairs.py b/tempest/api_schema/compute/v3/keypairs.py
new file mode 100644
index 0000000..0197c84
--- /dev/null
+++ b/tempest/api_schema/compute/v3/keypairs.py
@@ -0,0 +1,32 @@
+# Copyright 2014 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.
+
+get_keypair = {
+    'status_code': [200],
+    'response_body': {
+        'type': 'object',
+        'properties': {
+            'keypair': {
+                'type': 'object',
+                'properties': {
+                    'public_key': {'type': 'string'},
+                    'name': {'type': 'string'},
+                    'fingerprint': {'type': 'string'}
+                },
+                'required': ['public_key', 'name', 'fingerprint']
+            }
+        },
+        'required': ['keypair']
+    }
+}
diff --git a/tempest/services/compute/json/keypairs_client.py b/tempest/services/compute/json/keypairs_client.py
index 28f3c31..889e2ed 100644
--- a/tempest/services/compute/json/keypairs_client.py
+++ b/tempest/services/compute/json/keypairs_client.py
@@ -15,6 +15,7 @@
 
 import json
 
+from tempest.api_schema.compute.v2 import keypairs as schema
 from tempest.common import rest_client
 from tempest import config
 
@@ -40,6 +41,7 @@
     def get_keypair(self, key_name):
         resp, body = self.get("os-keypairs/%s" % str(key_name))
         body = json.loads(body)
+        self.validate_response(schema.get_keypair, resp, body)
         return resp, body['keypair']
 
     def create_keypair(self, name, pub_key=None):
diff --git a/tempest/services/compute/v3/json/keypairs_client.py b/tempest/services/compute/v3/json/keypairs_client.py
index 9ca4885..f412e30 100644
--- a/tempest/services/compute/v3/json/keypairs_client.py
+++ b/tempest/services/compute/v3/json/keypairs_client.py
@@ -15,6 +15,7 @@
 
 import json
 
+from tempest.api_schema.compute.v3 import keypairs as schema
 from tempest.common import rest_client
 from tempest import config
 
@@ -40,6 +41,7 @@
     def get_keypair(self, key_name):
         resp, body = self.get("keypairs/%s" % str(key_name))
         body = json.loads(body)
+        self.validate_response(schema.get_keypair, resp, body)
         return resp, body['keypair']
 
     def create_keypair(self, name, pub_key=None):