Removing a tech-profile from the data-model if that's not found in etcd

Change-Id: Ibd2848cf417eed8a06881c6d9d080728db5965e9
diff --git a/xos/synchronizer/steps/sync_tech_profile.py b/xos/synchronizer/steps/sync_tech_profile.py
index dcd5f52..ad16f00 100644
--- a/xos/synchronizer/steps/sync_tech_profile.py
+++ b/xos/synchronizer/steps/sync_tech_profile.py
@@ -16,14 +16,12 @@
 sys.path.append(os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
 
 from helpers import Helpers
-
 import requests
 from multistructlog import create_logger
 from requests.auth import HTTPBasicAuth
 from xossynchronizer.modelaccessor import TechnologyProfile, model_accessor
 from xossynchronizer.steps.syncstep import SyncStep
 from xosconfig import Config
-
 import etcd3
 
 # TODO store ETCD_HOST_URL and ETCD_PORT in the vOLT Service model
@@ -33,26 +31,28 @@
 
 log = create_logger(Config().get("logging"))
 
+
 class SyncTechnologyProfile(SyncStep):
     provides = [TechnologyProfile]
 
     observes = TechnologyProfile
 
-    def update_etcd(self, operation, key, value):
+    def update_etcd(self, operation, key, value=None):
         log.info('Update Etcd store: ', operation=operation, key=PREFIX + key, value=value)
-
         etcd = etcd3.client(host=ETCD_HOST_URL, port=ETCD_PORT)
         if operation == 'PUT':
-           etcd.put(PREFIX + key, value)
-           log.info('Technology Profile [%s] saved successfully to Etcd store' % (PREFIX + key))
+            etcd.put(PREFIX + key, value)
+            log.info('Technology Profile [%s] saved successfully to Etcd store' % (PREFIX + key))
+        elif operation == 'GET':
+            return etcd.get(PREFIX + key)
         elif operation == 'DELETE':
-           if False == etcd.delete(PREFIX + key):
-               log.error('Error while deleting Technology Profile [%s] from Etcd store' % key)
-               raise Exception('Failed to delete Technology Profile')
-           else:
-               log.info('Technology Profile [%s] deleted successfully from Etcd store' % key)
+            if False == etcd.delete(PREFIX + key):
+                log.error('Error while deleting Technology Profile [%s] from Etcd store' % key)
+                raise Exception('Failed to delete Technology Profile')
+            else:
+                log.info('Technology Profile [%s] deleted successfully from Etcd store' % key)
         else:
-           log.warning('Invalid or unsupported Etcd operation: %s' % operation)
+            log.warning('Invalid or unsupported Etcd operation: %s' % operation)
 
     def sync_record(self, model):
 
@@ -61,13 +61,14 @@
         log.info('TechnologyProfile: %s : %s' % (model.technology, model.profile_id))
 
         tp_key = u'/' + model.technology + u'/' + str(model.profile_id)
-        self.update_etcd('PUT', tp_key, model.profile_value)
+        self.update_etcd('PUT', tp_key, value=model.profile_value)
 
     def delete_record(self, model):
         log.info('Deleting TechnologyProfile', object=str(model), **model.tologdict())
 
         log.info('TechnologyProfile: %s : %s' % (model.technology, model.profile_id))
 
-        tp_key = u'/' + model.technology + u'/' + str(model.profile_id)
-        self.update_etcd('DELETE', tp_key, None)
-
+        tp_key = "/%s/%s" % (model.technology, model.profile_id)
+        [existing_tp, metadata] = self.update_etcd('GET', tp_key)
+        if existing_tp is not None:
+            self.update_etcd('DELETE', tp_key)
diff --git a/xos/synchronizer/steps/test_sync_onu_device.py b/xos/synchronizer/steps/test_sync_onu_device.py
index aba57aa..bf85bde 100644
--- a/xos/synchronizer/steps/test_sync_onu_device.py
+++ b/xos/synchronizer/steps/test_sync_onu_device.py
@@ -20,7 +20,7 @@
 
 test_path=os.path.abspath(os.path.dirname(os.path.realpath(__file__)))
 
-class TestSyncVOLTServiceInstance(unittest.TestCase):
+class TestSyncONUDevice(unittest.TestCase):
     def setUp(self):
 
         self.sys_path_save = sys.path
diff --git a/xos/synchronizer/steps/test_sync_tech_profile.py b/xos/synchronizer/steps/test_sync_tech_profile.py
new file mode 100644
index 0000000..38e4202
--- /dev/null
+++ b/xos/synchronizer/steps/test_sync_tech_profile.py
@@ -0,0 +1,99 @@
+# Copyright 2017-present Open Networking Foundation
+#
+# 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 unittest
+from mock import patch, call, Mock, PropertyMock
+import requests_mock
+
+import os, sys
+
+test_path=os.path.abspath(os.path.dirname(os.path.realpath(__file__)))
+
+class TestSyncTechProfile(unittest.TestCase):
+    def setUp(self):
+
+        self.mock_etcd = Mock(name="etcd-client")
+        etcd = Mock(name="etcd-mocked-lib")
+        etcd.client.return_value = self.mock_etcd
+        modules = {
+            'etcd3': etcd
+        }
+        self.module_patcher = patch.dict('sys.modules', modules)
+        self.module_patcher.start()
+
+        self.sys_path_save = sys.path
+
+        # Setting up the config module
+        from xosconfig import Config
+        config = os.path.join(test_path, "../test_config.yaml")
+        Config.clear()
+        Config.init(config, "synchronizer-config-schema.yaml")
+        # END Setting up the config module
+
+        from xossynchronizer.mock_modelaccessor_build import mock_modelaccessor_config
+        mock_modelaccessor_config(test_path, [("olt-service", "volt.xproto"),
+                                                ("rcord", "rcord.xproto")])
+
+        import xossynchronizer.modelaccessor
+        reload(xossynchronizer.modelaccessor)      # in case nose2 loaded it in a previous test
+
+        from xossynchronizer.modelaccessor import model_accessor
+        self.model_accessor = model_accessor
+
+        from xossynchronizer.steps.syncstep import DeferredException
+        from sync_tech_profile import SyncTechnologyProfile, model_accessor
+
+        # import all class names to globals
+        for (k, v) in model_accessor.all_model_classes.items():
+            globals()[k] = v
+
+        self.sync_step = SyncTechnologyProfile
+
+        self.o = Mock()
+        self.o.technology = "test_technology"
+        self.o.profile_id = 64
+        self.o.profile_value = '{"test":"profile"}'
+
+        self.o.tologdict.return_value = {'name': "mock-tp"}
+
+    def tearDown(self):
+        self.o = None
+        sys.path = self.sys_path_save
+        self.module_patcher.stop()
+
+    def test_sync(self):
+
+        self.sync_step(model_accessor=self.model_accessor).sync_record(self.o)
+        self.mock_etcd.put.assert_called_with('service/voltha/technology_profiles/test_technology/64',
+                                              '{"test":"profile"}')
+
+    def test_delete(self):
+
+        self.mock_etcd.get.return_value = [self.o.profile_value, "response from mock-etcd"]
+
+        self.sync_step(model_accessor=self.model_accessor).delete_record(self.o)
+        self.mock_etcd.get.assert_called_with('service/voltha/technology_profiles/test_technology/64')
+        self.mock_etcd.delete.assert_called_with('service/voltha/technology_profiles/test_technology/64')
+
+    def test_delete_missing_object(self):
+
+        self.mock_etcd.get.return_value = [None, "response from mock-etcd"]
+
+        self.sync_step(model_accessor=self.model_accessor).delete_record(self.o)
+        self.mock_etcd.get.assert_called_with('service/voltha/technology_profiles/test_technology/64')
+        self.mock_etcd.delete.assert_not_called()
+
+
+if __name__ == "__main__":
+    unittest.main()