Add Cinder Cluster Data Model Collector test case

This patch adds Cinder Data Model Collector test case.

Change-Id: Ifaf7cd4a962da287f740a12e4c382a1ca92750d6

watcher/tests/decision_engine/cluster/test_cinder_cdmc.py

@@ -0,0 +1,103 @@
+# 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 mock
+
+from watcher.common import cinder_helper
+from watcher.decision_engine.model.collector import cinder
+from watcher.tests import base
+from watcher.tests import conf_fixture
+
+
+class TestCinderClusterDataModelCollector(base.TestCase):
+
+    def setUp(self):
+        super(TestCinderClusterDataModelCollector, self).setUp()
+        self.useFixture(conf_fixture.ConfReloadFixture())
+
+    @mock.patch('keystoneclient.v3.client.Client', mock.Mock())
+    @mock.patch.object(cinder_helper, 'CinderHelper')
+    def test_cinder_cdmc_execute(self, m_cinder_helper_cls):
+
+        m_cinder_helper = mock.Mock(name="cinder_helper")
+        m_cinder_helper_cls.return_value = m_cinder_helper
+
+        fake_storage_node = mock.Mock(
+            host='host@backend',
+            zone='zone',
+            status='enabled',
+            state='up',
+            volume_type=['fake_type']
+        )
+
+        fake_storage_pool = mock.Mock(
+            total_volumes=1,
+            total_capacity_gb=30,
+            free_capacity_gb=20,
+            provisioned_capacity_gb=10,
+            allocated_capacity_gb=10,
+            virtual_free=20
+        )
+        setattr(fake_storage_pool, 'name', 'host@backend#pool')
+
+        fake_volume = mock.Mock(
+            id=1,
+            size=1,
+            status='in-use',
+            attachments=[{"server_id": "server_id",
+                          "attachment_id": "attachment_id"}],
+            multiattach='false',
+            snapshot_id='',
+            metadata='{"key": "value"}',
+            bootable='false'
+        )
+        setattr(fake_volume, 'name', 'name')
+        setattr(fake_volume, 'os-vol-tenant-attr:tenant_id', 'project_id')
+        setattr(fake_volume, 'os-vol-host-attr:host', 'host@backend#pool')
+
+        # storage node list
+        m_cinder_helper.get_storage_node_list.return_value = [
+            fake_storage_node]
+        m_cinder_helper.get_volume_type_by_backendname.return_value = [
+            'fake_type']
+
+        # storage pool list
+        m_cinder_helper.get_storage_pool_list.return_value = [
+            fake_storage_pool]
+        # volume list
+        m_cinder_helper.get_volume_list.return_value = [fake_volume]
+
+        m_config = mock.Mock()
+        m_osc = mock.Mock()
+
+        cinder_cdmc = cinder.CinderClusterDataModelCollector(
+            config=m_config, osc=m_osc)
+
+        model = cinder_cdmc.execute()
+
+        storage_nodes = model.get_all_storage_nodes()
+        storage_node = list(storage_nodes.values())[0]
+
+        storage_pools = model.get_node_pools(storage_node)
+        storage_pool = storage_pools[0]
+
+        volumes = model.get_pool_volumes(storage_pool)
+        volume = volumes[0]
+
+        self.assertEqual(1, len(storage_nodes))
+        self.assertEqual(1, len(storage_pools))
+        self.assertEqual(1, len(volumes))
+
+        self.assertEqual(storage_node.host, 'host@backend')
+        self.assertEqual(storage_pool.name, 'host@backend#pool')
+        self.assertEqual(volume.uuid, '1')