SEBA-542 Basic scaffolding for TT Workflow Driver service

Change-Id: Ia88a4d22f40b45299bb35e7bc5600cccbc453873
diff --git a/xos/synchronizer/event_steps/test_onu_events.py b/xos/synchronizer/event_steps/test_onu_events.py
new file mode 100644
index 0000000..ea368d5
--- /dev/null
+++ b/xos/synchronizer/event_steps/test_onu_events.py
@@ -0,0 +1,135 @@
+# 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 json
+
+import os, sys
+
+test_path=os.path.abspath(os.path.dirname(os.path.realpath(__file__)))
+
+class TestSyncOLTDevice(unittest.TestCase):
+
+    def setUp(self):
+
+        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, [("tt-workflow-driver", "tt-workflow-driver.xproto"),
+                                              ("olt-service", "volt.xproto"),
+                                              ("rcord", "rcord.xproto")])
+
+        import xossynchronizer.modelaccessor
+        import mock_modelaccessor
+        reload(mock_modelaccessor) # in case nose2 loaded it in a previous test
+        reload(xossynchronizer.modelaccessor)      # in case nose2 loaded it in a previous test
+
+        from xossynchronizer.modelaccessor import model_accessor
+        from onu_event import ONUEventStep
+
+        # import all class names to globals
+        for (k, v) in model_accessor.all_model_classes.items():
+            globals()[k] = v
+
+        self.model_accessor = model_accessor
+        self.log = Mock()
+
+        self.event_step = ONUEventStep(model_accessor=self.model_accessor, log=self.log)
+
+        self.event = Mock()
+        self.event_dict = {
+            'status': 'activated',
+            'serial_number': 'BRCM1234',
+            'of_dpid': 'of:109299321',
+            'uni_port_id': 16
+        }
+        self.event.value = json.dumps(self.event_dict)
+
+        self.tt = TtWorkflowDriverService(name="tt-workflow-driver")
+
+    def tearDown(self):
+        sys.path = self.sys_path_save
+
+
+    def test_create_instance(self):
+
+        with patch.object(TtWorkflowDriverServiceInstance.objects, "get_items") as tt_si_mock , \
+            patch.object(TtWorkflowDriverService.objects, "get_items") as service_mock, \
+            patch.object(TtWorkflowDriverServiceInstance, "save", autospec=True) as mock_save:
+
+            tt_si_mock.return_value = []
+            service_mock.return_value = [self.tt]
+
+            self.event_step.process_event(self.event)
+
+            tt_si = mock_save.call_args[0][0]
+
+            self.assertEqual(mock_save.call_count, 1)
+
+            self.assertEqual(tt_si.serial_number, self.event_dict['serial_number'])
+            self.assertEqual(tt_si.of_dpid, self.event_dict['of_dpid'])
+            self.assertEqual(tt_si.uni_port_id, self.event_dict['uni_port_id'])
+            self.assertEqual(tt_si.onu_state, "ENABLED")
+
+    def test_reuse_instance(self):
+
+        si = TtWorkflowDriverServiceInstance(
+            serial_number=self.event_dict["serial_number"],
+            of_dpid="foo",
+            uni_port_id="foo"
+        )
+
+        with patch.object(TtWorkflowDriverServiceInstance.objects, "get_items") as tt_si_mock , \
+            patch.object(TtWorkflowDriverServiceInstance, "save", autospec=True) as mock_save:
+
+            tt_si_mock.return_value = [si]
+
+            self.event_step.process_event(self.event)
+
+            tt_si = mock_save.call_args[0][0]
+
+            self.assertEqual(mock_save.call_count, 1)
+
+            self.assertEqual(tt_si.serial_number, self.event_dict['serial_number'])
+            self.assertEqual(tt_si.of_dpid, self.event_dict['of_dpid'])
+            self.assertEqual(tt_si.uni_port_id, self.event_dict['uni_port_id'])
+            self.assertEqual(tt_si.onu_state, "ENABLED")
+
+    def test_disable_onu(self):
+        self.event_dict = {
+            'status': 'disabled',
+            'serial_number': 'BRCM1234',
+            'of_dpid': 'of:109299321',
+            'uni_port_id': 16
+        }
+        self.event.value = json.dumps(self.event_dict)
+
+        with patch.object(TtWorkflowDriverServiceInstance, "save", autospec=True) as mock_save:
+
+            self.event_step.process_event(self.event)
+
+            self.assertEqual(mock_save.call_count, 0)
+            
+
+if __name__ == '__main__':
+    sys.path.append("..")  # for import of helpers.py
+    unittest.main()
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