Add tests for server-group Nova V2 APIs

This patch adds the JSON tests for following server-group Nova V2 APIs
1. server-group create
2. server-group delete
3. server-group list
4. server-group get

It Also adds the clients for JSON

Closes-Bug: 1297933
Change-Id: Iee2717872d58a715f9e012218a67bf040d2abe80
diff --git a/tempest/api/compute/base.py b/tempest/api/compute/base.py
index edeb2fc..65ef4f0 100644
--- a/tempest/api/compute/base.py
+++ b/tempest/api/compute/base.py
@@ -54,6 +54,7 @@
         cls.images = []
         cls.multi_user = cls.get_multi_user()
         cls.security_groups = []
+        cls.server_groups = []
 
         if cls._api_version == 2:
             cls.servers_client = cls.os.servers_client
@@ -191,11 +192,24 @@
                 pass
 
     @classmethod
+    def clear_server_groups(cls):
+        for server_group_id in cls.server_groups:
+            try:
+                cls.client.delete_server_group(server_group_id)
+            except exceptions.NotFound:
+                # The server-group may have already been deleted which is OK.
+                pass
+            except Exception:
+                LOG.exception('Exception raised deleting server-group %s',
+                              server_group_id)
+
+    @classmethod
     def tearDownClass(cls):
         cls.clear_images()
         cls.clear_servers()
         cls.clear_security_groups()
         cls.clear_isolated_creds()
+        cls.clear_server_groups()
         super(BaseComputeTest, cls).tearDownClass()
 
     @classmethod
@@ -249,6 +263,16 @@
 
         return resp, body
 
+    @classmethod
+    def create_test_server_group(cls, name="", policy=[]):
+        if not name:
+            name = data_utils.rand_name(cls.__name__ + "-Server-Group")
+        if not policy:
+            policy = ['affinity']
+        resp, body = cls.servers_client.create_server_group(name, policy)
+        cls.server_groups.append(body)
+        return resp, body
+
     def wait_for(self, condition):
         """Repeatedly calls condition() until a timeout."""
         start_time = int(time.time())
diff --git a/tempest/api/compute/servers/test_server_group.py b/tempest/api/compute/servers/test_server_group.py
new file mode 100644
index 0000000..0cd23fd
--- /dev/null
+++ b/tempest/api/compute/servers/test_server_group.py
@@ -0,0 +1,112 @@
+# Copyright 2014 NEC Technologies India Ltd.
+# 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.api.compute import base
+from tempest.common.utils import data_utils
+from tempest import test
+
+
+class ServerGroupTestJSON(base.BaseV2ComputeTest):
+    """
+    These tests check for the server-group APIs
+    They create/delete server-groups with different policies.
+    policies = affinity/anti-affinity
+    It also adds the tests for list and get details of server-groups
+    """
+    @classmethod
+    @test.safe_setup
+    def setUpClass(cls):
+        super(ServerGroupTestJSON, cls).setUpClass()
+        if not test.is_extension_enabled('os-server-groups', 'compute'):
+            msg = "os-server-groups extension is not enabled."
+            raise cls.skipException(msg)
+        cls.client = cls.servers_client
+        server_group_name = data_utils.rand_name('server-group')
+        cls.policy = ['affinity']
+
+        _, cls.created_server_group = cls.create_test_server_group(
+            server_group_name,
+            cls.policy)
+
+    def _create_server_group(self, name, policy):
+        # create the test server-group with given policy
+        server_group = {'name': name, 'policies': policy}
+        resp, body = self.create_test_server_group(name, policy)
+        self.assertEqual(200, resp.status)
+        for key in ['name', 'policies']:
+            self.assertEqual(server_group[key], body[key])
+        return body
+
+    def _delete_server_group(self, server_group):
+        # delete the test server-group
+        resp, _ = self.client.delete_server_group(server_group['id'])
+        self.assertEqual(204, resp.status)
+        # validation of server-group deletion
+        resp, server_group_list = self.client.list_server_groups()
+        self.assertEqual(200, resp.status)
+        self.assertNotIn(server_group, server_group_list)
+
+    def _create_delete_server_group(self, policy):
+        # Create and Delete the server-group with given policy
+        name = data_utils.rand_name('server-group')
+        server_group = self._create_server_group(name, policy)
+        self._delete_server_group(server_group)
+
+    @test.attr(type='gate')
+    def test_create_delete_server_group_with_affinity_policy(self):
+        # Create and Delete the server-group with affinity policy
+        self._create_delete_server_group(self.policy)
+
+    @test.attr(type='gate')
+    def test_create_delete_server_group_with_anti_affinity_policy(self):
+        # Create and Delete the server-group with anti-affinity policy
+        policy = ['anti-affinity']
+        self._create_delete_server_group(policy)
+
+    @test.attr(type='gate')
+    def test_create_delete_server_group_with_multiple_policies(self):
+        # Create and Delete the server-group with multiple policies
+        policies = ['affinity', 'affinity']
+        self._create_delete_server_group(policies)
+
+    @test.attr(type='gate')
+    def test_create_delete_multiple_server_groups_with_same_name_policy(self):
+        # Create and Delete the server-groups with same name and same policy
+        server_groups = []
+        server_group_name = data_utils.rand_name('server-group')
+        for i in range(0, 2):
+            server_groups.append(self._create_server_group(server_group_name,
+                                                           self.policy))
+        for key in ['name', 'policies']:
+            self.assertEqual(server_groups[0][key], server_groups[1][key])
+        self.assertNotEqual(server_groups[0]['id'], server_groups[1]['id'])
+
+        for i in range(0, 2):
+            self._delete_server_group(server_groups[i])
+
+    @test.attr(type='gate')
+    def test_get_server_group(self):
+        # Get the server-group
+        resp, body = self.client.get_server_group(
+            self.created_server_group['id'])
+        self.assertEqual(200, resp.status)
+        self.assertEqual(self.created_server_group, body)
+
+    @test.attr(type='gate')
+    def test_list_server_groups(self):
+        # List the server-group
+        resp, body = self.client.list_server_groups()
+        self.assertEqual(200, resp.status)
+        self.assertIn(self.created_server_group, body)
diff --git a/tempest/services/compute/json/servers_client.py b/tempest/services/compute/json/servers_client.py
index f6b76e9..af70504 100644
--- a/tempest/services/compute/json/servers_client.py
+++ b/tempest/services/compute/json/servers_client.py
@@ -476,3 +476,36 @@
         return self.action(server_id, "os-getVNCConsole",
                            "console", common_schema.get_vnc_console,
                            type=console_type)
+
+    def create_server_group(self, name, policies):
+        """
+        Create the server group
+        name : Name of the server-group
+        policies : List of the policies - affinity/anti-affinity)
+        """
+        post_body = {
+            'name': name,
+            'policies': policies,
+        }
+
+        post_body = json.dumps({'server_group': post_body})
+        resp, body = self.post('os-server-groups', post_body)
+
+        body = json.loads(body)
+        return resp, body['server_group']
+
+    def delete_server_group(self, server_group_id):
+        """Delete the given server-group."""
+        return self.delete("os-server-groups/%s" % str(server_group_id))
+
+    def list_server_groups(self):
+        """List the server-groups."""
+        resp, body = self.get("os-server-groups")
+        body = json.loads(body)
+        return resp, body['server_groups']
+
+    def get_server_group(self, server_group_id):
+        """Get the details of given server_group."""
+        resp, body = self.get("os-server-groups/%s" % str(server_group_id))
+        body = json.loads(body)
+        return resp, body['server_group']