SEBA-542 Basic scaffolding for TT Workflow Driver service

Change-Id: Ia88a4d22f40b45299bb35e7bc5600cccbc453873
diff --git a/xos/synchronizer/event_steps/test_dhcp_event.py b/xos/synchronizer/event_steps/test_dhcp_event.py
new file mode 100644
index 0000000..d7934da
--- /dev/null
+++ b/xos/synchronizer/event_steps/test_dhcp_event.py
@@ -0,0 +1,110 @@
+# 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 TestSubscriberAuthEvent(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")
+        from multistructlog import create_logger
+        log = create_logger(Config().get('logging'))
+        # 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 dhcp_event import SubscriberDhcpEventStep
+
+        # 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 = log
+
+        self.event_step = SubscriberDhcpEventStep(model_accessor=self.model_accessor, log=self.log)
+
+        self.event = Mock()
+
+        self.volt = Mock()
+        self.volt.name = "vOLT"
+        self.volt.leaf_model = Mock()
+
+        # self.subscriber = RCORDSubscriber()
+        # self.subscriber.onu_device = "BRCM1234"
+        # self.subscriber.save = Mock()
+
+        self.mac_address = "00:AA:00:00:00:01"
+        self.ip_address = "192.168.3.5"
+
+        self.si = TtWorkflowDriverServiceInstance()
+        self.si.serial_number = "BRCM1234"
+        self.si.save = Mock()
+
+
+    def tearDown(self):
+        sys.path = self.sys_path_save
+
+    def test_dhcp_subscriber(self):
+
+        self.event.value = json.dumps({
+            "deviceId" : "of:0000000000000001",
+            "portNumber" : "1",
+            "macAddress" : self.mac_address,
+            "ipAddress" : self.ip_address,
+            "messageType": "DHCPREQUEST"
+        })
+
+        with patch.object(VOLTService.objects, "get_items") as volt_service_mock, \
+            patch.object(TtWorkflowDriverServiceInstance.objects, "get_items") as si_mock, \
+            patch.object(self.volt, "get_onu_sn_from_openflow") as get_onu_sn:
+
+            self.assertTrue(VOLTService.objects.first() is not None)
+
+            volt_service_mock.return_value = [self.volt]
+            get_onu_sn.return_value = "BRCM1234"
+            si_mock.return_value = [self.si]
+
+            self.event_step.process_event(self.event)
+
+            self.si.save.assert_called()
+            self.assertEqual(self.si.dhcp_state, "DHCPREQUEST")
+            self.assertEqual(self.si.mac_address, self.mac_address)
+            self.assertEqual(self.si.ip_address, self.ip_address)
+
+if __name__ == '__main__':
+    sys.path.append("..") # for import of helpers.py
+    unittest.main()
\ No newline at end of file