Make ixnet a class attribute in TestIxNextgen

Change-Id: Iad8e8397f4ef339f70c6eef80ef58b1b045ef3fa
Signed-off-by: Emma Foley <emma.l.foley@intel.com>

1 files changed, 85 insertions, 151 deletions

diff --git a/yardstick/tests/unit/network_services/libs/ixia_libs/test_ixnet_api.py b/yardstick/tests/unit/network_services/libs/ixia_libs/test_ixnet_api.py
index 2327d1ac8..42ca7f769 100644
--- a/yardstick/tests/unit/network_services/libs/ixia_libs/test_ixnet_api.py
+++ b/yardstick/tests/unit/network_services/libs/ixia_libs/test_ixnet_api.py
@@ -83,6 +83,8 @@ class TestIxNextgen(unittest.TestCase):
         self.ixnet = mock.Mock()
         self.ixnet.execute = mock.Mock()
         self.ixnet.getRoot.return_value = 'my_root'
+        self.ixnet_gen = ixnet_api.IxNextgen()
+        self.ixnet_gen._ixnet = self.ixnet
 
     def test_get_config(self):
         tg_cfg = {
@@ -120,64 +122,50 @@ class TestIxNextgen(unittest.TestCase):
         self.assertEqual(result, expected)
 
     def test__get_config_element_by_flow_group_name(self):
-        ixnet_gen = ixnet_api.IxNextgen()
-        ixnet_gen._ixnet = self.ixnet
-        ixnet_gen._ixnet.getList.side_effect = [['traffic_item'],
-                                                ['fg_01']]
-        ixnet_gen._ixnet.getAttribute.return_value = 'flow_group_01'
-        output = ixnet_gen._get_config_element_by_flow_group_name(
+        self.ixnet_gen._ixnet.getList.side_effect = [['traffic_item'],
+                                                     ['fg_01']]
+        self.ixnet_gen._ixnet.getAttribute.return_value = 'flow_group_01'
+        output = self.ixnet_gen._get_config_element_by_flow_group_name(
             'flow_group_01')
         self.assertEqual('traffic_item/configElement:flow_group_01', output)
 
     def test__get_config_element_by_flow_group_name_no_match(self):
-        ixnet_gen = ixnet_api.IxNextgen()
-        ixnet_gen._ixnet = self.ixnet
-        ixnet_gen._ixnet.getList.side_effect = [['traffic_item'],
-                                                ['fg_01']]
-        ixnet_gen._ixnet.getAttribute.return_value = 'flow_group_02'
-        output = ixnet_gen._get_config_element_by_flow_group_name(
+        self.ixnet_gen._ixnet.getList.side_effect = [['traffic_item'],
+                                                     ['fg_01']]
+        self.ixnet_gen._ixnet.getAttribute.return_value = 'flow_group_02'
+        output = self.ixnet_gen._get_config_element_by_flow_group_name(
             'flow_group_01')
         self.assertIsNone(output)
 
     def test__get_stack_item(self):
-        ixnet_gen = ixnet_api.IxNextgen()
-        ixnet_gen._ixnet = self.ixnet
-        ixnet_gen._ixnet.getList.return_value = ['tcp1', 'tcp2', 'udp']
+        self.ixnet_gen._ixnet.getList.return_value = ['tcp1', 'tcp2', 'udp']
         with mock.patch.object(
-                ixnet_gen, '_get_config_element_by_flow_group_name') as \
+                self.ixnet_gen, '_get_config_element_by_flow_group_name') as \
                 mock_get_cfg_element:
             mock_get_cfg_element.return_value = 'cfg_element'
-            output = ixnet_gen._get_stack_item(mock.ANY, ixnet_api.PROTO_TCP)
+            output = self.ixnet_gen._get_stack_item(mock.ANY, ixnet_api.PROTO_TCP)
         self.assertEqual(['tcp1', 'tcp2'], output)
 
     def test__get_stack_item_no_config_element(self):
-        ixnet_gen = ixnet_api.IxNextgen()
-        ixnet_gen._ixnet = self.ixnet
         with mock.patch.object(
-                ixnet_gen, '_get_config_element_by_flow_group_name',
+                self.ixnet_gen, '_get_config_element_by_flow_group_name',
                 return_value=None):
             with self.assertRaises(exceptions.IxNetworkFlowNotPresent):
-                ixnet_gen._get_stack_item(mock.ANY, mock.ANY)
+                self.ixnet_gen._get_stack_item(mock.ANY, mock.ANY)
 
     def test__get_field_in_stack_item(self):
-        ixnet_gen = ixnet_api.IxNextgen()
-        ixnet_gen._ixnet = self.ixnet
-        ixnet_gen._ixnet.getList.return_value = ['field1', 'field2']
-        output = ixnet_gen._get_field_in_stack_item(mock.ANY, 'field2')
+        self.ixnet_gen._ixnet.getList.return_value = ['field1', 'field2']
+        output = self.ixnet_gen._get_field_in_stack_item(mock.ANY, 'field2')
         self.assertEqual('field2', output)
 
     def test__get_field_in_stack_item_no_field_present(self):
-        ixnet_gen = ixnet_api.IxNextgen()
-        ixnet_gen._ixnet = self.ixnet
-        ixnet_gen._ixnet.getList.return_value = ['field1', 'field2']
+        self.ixnet_gen._ixnet.getList.return_value = ['field1', 'field2']
         with self.assertRaises(exceptions.IxNetworkFieldNotPresentInStackItem):
-            ixnet_gen._get_field_in_stack_item(mock.ANY, 'field3')
+            self.ixnet_gen._get_field_in_stack_item(mock.ANY, 'field3')
 
     def test__parse_framesize(self):
-        ixnet_gen = ixnet_api.IxNextgen()
-        ixnet_gen._ixnet = self.ixnet
         framesize = {'64B': '75', '512b': '25'}
-        output = ixnet_gen._parse_framesize(framesize)
+        output = self.ixnet_gen._parse_framesize(framesize)
         self.assertEqual(2, len(output))
         self.assertIn([64, 64, 75], output)
         self.assertIn([512, 512, 25], output)
@@ -185,55 +173,44 @@ class TestIxNextgen(unittest.TestCase):
     @mock.patch.object(IxNetwork, 'IxNet')
     def test_connect(self, mock_ixnet):
         mock_ixnet.return_value = self.ixnet
-        ixnet_gen = ixnet_api.IxNextgen()
-        with mock.patch.object(ixnet_gen, 'get_config') as mock_config:
+        with mock.patch.object(self.ixnet_gen, 'get_config') as mock_config:
             mock_config.return_value = {'machine': 'machine_fake',
                                         'port': 'port_fake',
                                         'version': 12345}
-            ixnet_gen.connect(mock.ANY)
+            self.ixnet_gen.connect(mock.ANY)
 
         self.ixnet.connect.assert_called_once_with(
             'machine_fake', '-port', 'port_fake', '-version', '12345')
         mock_config.assert_called_once()
 
     def test_connect_invalid_config_no_machine(self):
-        ixnet_gen = ixnet_api.IxNextgen()
-        ixnet_gen._ixnet = self.ixnet
-        ixnet_gen.get_config = mock.Mock(return_value={
+        self.ixnet_gen.get_config = mock.Mock(return_value={
             'port': 'port_fake',
             'version': '12345'})
-        self.assertRaises(KeyError, ixnet_gen.connect, mock.ANY)
+        self.assertRaises(KeyError, self.ixnet_gen.connect, mock.ANY)
         self.ixnet.connect.assert_not_called()
 
     def test_connect_invalid_config_no_port(self):
-        ixnet_gen = ixnet_api.IxNextgen()
-        ixnet_gen._ixnet = self.ixnet
-        ixnet_gen.get_config = mock.Mock(return_value={
+        self.ixnet_gen.get_config = mock.Mock(return_value={
             'machine': 'machine_fake',
             'version': '12345'})
-        self.assertRaises(KeyError, ixnet_gen.connect, mock.ANY)
+        self.assertRaises(KeyError, self.ixnet_gen.connect, mock.ANY)
         self.ixnet.connect.assert_not_called()
 
     def test_connect_invalid_config_no_version(self):
-        ixnet_gen = ixnet_api.IxNextgen()
-        ixnet_gen._ixnet = self.ixnet
-        ixnet_gen.get_config = mock.Mock(return_value={
+        self.ixnet_gen.get_config = mock.Mock(return_value={
             'machine': 'machine_fake',
             'port': 'port_fake'})
-        self.assertRaises(KeyError, ixnet_gen.connect, mock.ANY)
+        self.assertRaises(KeyError, self.ixnet_gen.connect, mock.ANY)
         self.ixnet.connect.assert_not_called()
 
     def test_connect_no_config(self):
-        ixnet_gen = ixnet_api.IxNextgen()
-        ixnet_gen._ixnet = self.ixnet
-        ixnet_gen.get_config = mock.Mock(return_value={})
-        self.assertRaises(KeyError, ixnet_gen.connect, mock.ANY)
+        self.ixnet_gen.get_config = mock.Mock(return_value={})
+        self.assertRaises(KeyError, self.ixnet_gen.connect, mock.ANY)
         self.ixnet.connect.assert_not_called()
 
     def test_clear_config(self):
-        ixnet_gen = ixnet_api.IxNextgen()
-        ixnet_gen._ixnet = self.ixnet
-        ixnet_gen.clear_config()
+        self.ixnet_gen.clear_config()
         self.ixnet.execute.assert_called_once_with('newConfig')
 
     @mock.patch.object(ixnet_api, 'log')
@@ -243,11 +220,9 @@ class TestIxNextgen(unittest.TestCase):
             'chassis': '1.1.1.1',
             'cards': ['1', '2'],
             'ports': ['2', '2']}
-        ixnet_gen = ixnet_api.IxNextgen()
-        ixnet_gen._ixnet = self.ixnet
-        ixnet_gen._cfg = config
+        self.ixnet_gen._cfg = config
 
-        self.assertIsNone(ixnet_gen.assign_ports())
+        self.assertIsNone(self.ixnet_gen.assign_ports())
         self.assertEqual(self.ixnet.execute.call_count, 2)
         self.assertEqual(self.ixnet.commit.call_count, 4)
         self.assertEqual(self.ixnet.getAttribute.call_count, 2)
@@ -259,25 +234,19 @@ class TestIxNextgen(unittest.TestCase):
             'chassis': '1.1.1.1',
             'cards': ['1', '2'],
             'ports': ['3', '4']}
-        ixnet_gen = ixnet_api.IxNextgen()
-        ixnet_gen._ixnet = self.ixnet
-        ixnet_gen._cfg = config
-        ixnet_gen.assign_ports()
+        self.ixnet_gen._cfg = config
+        self.ixnet_gen.assign_ports()
         mock_log.warning.assert_called()
 
     def test_assign_ports_no_config(self):
-        ixnet_gen = ixnet_api.IxNextgen()
-        ixnet_gen._ixnet = self.ixnet
-        ixnet_gen._cfg = {}
-        self.assertRaises(KeyError, ixnet_gen.assign_ports)
+        self.ixnet_gen._cfg = {}
+        self.assertRaises(KeyError, self.ixnet_gen.assign_ports)
 
     def test__create_traffic_item(self):
-        ixnet_gen = ixnet_api.IxNextgen()
-        ixnet_gen._ixnet = self.ixnet
         self.ixnet.add.return_value = 'my_new_traffic_item'
         self.ixnet.remapIds.return_value = ['my_traffic_item_id']
 
-        ixnet_gen._create_traffic_item()
+        self.ixnet_gen._create_traffic_item()
         self.ixnet.add.assert_called_once_with(
             'my_root/traffic', 'trafficItem')
         self.ixnet.setMultiAttribute.assert_called_once_with(
@@ -288,41 +257,35 @@ class TestIxNextgen(unittest.TestCase):
                                 '-trackBy', 'trafficGroupId0')
 
     def test__create_flow_groups(self):
-        ixnet_gen = ixnet_api.IxNextgen()
-        ixnet_gen._ixnet = self.ixnet
-        ixnet_gen.ixnet.getList.side_effect = [['traffic_item'], ['1', '2']]
-        ixnet_gen.ixnet.add.side_effect = ['endp1', 'endp2']
-        ixnet_gen._create_flow_groups()
-        ixnet_gen.ixnet.add.assert_has_calls([
+        self.ixnet_gen.ixnet.getList.side_effect = [['traffic_item'], ['1', '2']]
+        self.ixnet_gen.ixnet.add.side_effect = ['endp1', 'endp2']
+        self.ixnet_gen._create_flow_groups()
+        self.ixnet_gen.ixnet.add.assert_has_calls([
             mock.call('traffic_item', 'endpointSet'),
             mock.call('traffic_item', 'endpointSet')])
-        ixnet_gen.ixnet.setMultiAttribute.assert_has_calls([
+        self.ixnet_gen.ixnet.setMultiAttribute.assert_has_calls([
             mock.call('endp1', '-name', '1', '-sources', ['1/protocols'],
                       '-destinations', ['2/protocols']),
             mock.call('endp2', '-name', '2', '-sources', ['2/protocols'],
                       '-destinations', ['1/protocols'])])
 
     def test__append_protocol_to_stack(self):
-        ixnet_gen = ixnet_api.IxNextgen()
-        ixnet_gen._ixnet = self.ixnet
 
-        ixnet_gen._append_procotol_to_stack('my_protocol', 'prev_element')
+        self.ixnet_gen._append_procotol_to_stack('my_protocol', 'prev_element')
         self.ixnet.execute.assert_called_with(
             'append', 'prev_element',
             'my_root/traffic/protocolTemplate:"my_protocol"')
 
     def test__setup_config_elements(self):
-        ixnet_gen = ixnet_api.IxNextgen()
-        ixnet_gen._ixnet = self.ixnet
-        ixnet_gen.ixnet.getList.side_effect = [['traffic_item'],
+        self.ixnet_gen.ixnet.getList.side_effect = [['traffic_item'],
                                                ['cfg_element']]
-        with mock.patch.object(ixnet_gen, '_append_procotol_to_stack') as \
+        with mock.patch.object(self.ixnet_gen, '_append_procotol_to_stack') as \
                 mock_append_proto:
-            ixnet_gen._setup_config_elements()
+            self.ixnet_gen._setup_config_elements()
         mock_append_proto.assert_has_calls([
             mock.call(ixnet_api.PROTO_UDP, 'cfg_element/stack:"ethernet-1"'),
             mock.call(ixnet_api.PROTO_IPV4, 'cfg_element/stack:"ethernet-1"')])
-        ixnet_gen.ixnet.setAttribute.assert_has_calls([
+        self.ixnet_gen.ixnet.setAttribute.assert_has_calls([
             mock.call('cfg_element/frameRateDistribution', '-portDistribution',
                       'splitRateEvenly'),
             mock.call('cfg_element/frameRateDistribution',
@@ -334,156 +297,127 @@ class TestIxNextgen(unittest.TestCase):
     def test_create_traffic_model(self, mock__setup_config_elements,
                                   mock__create_flow_groups,
                                   mock__create_traffic_item):
-        ixnet_gen = ixnet_api.IxNextgen()
-        ixnet_gen._ixnet = self.ixnet
 
-        ixnet_gen.create_traffic_model()
+        self.ixnet_gen.create_traffic_model()
         mock__create_traffic_item.assert_called_once()
         mock__create_flow_groups.assert_called_once()
         mock__setup_config_elements.assert_called_once()
 
     def test__update_frame_mac(self):
-        ixnet_gen = ixnet_api.IxNextgen()
-        ixnet_gen._ixnet = self.ixnet
-        with mock.patch.object(ixnet_gen, '_get_field_in_stack_item') as \
+        with mock.patch.object(self.ixnet_gen, '_get_field_in_stack_item') as \
                 mock_get_field:
             mock_get_field.return_value = 'field_descriptor'
-            ixnet_gen._update_frame_mac('ethernet_descriptor', 'field', 'mac')
+            self.ixnet_gen._update_frame_mac('ethernet_descriptor', 'field', 'mac')
         mock_get_field.assert_called_once_with('ethernet_descriptor', 'field')
-        ixnet_gen.ixnet.setMultiAttribute(
+        self.ixnet_gen.ixnet.setMultiAttribute(
             'field_descriptor', '-singleValue', 'mac', '-fieldValue', 'mac',
             '-valueType', 'singleValue')
-        ixnet_gen.ixnet.commit.assert_called_once()
+        self.ixnet_gen.ixnet.commit.assert_called_once()
 
     def test_update_frame(self):
-        ixnet_gen = ixnet_api.IxNextgen()
-        ixnet_gen._ixnet = self.ixnet
         with mock.patch.object(
-                ixnet_gen, '_get_config_element_by_flow_group_name',
+                self.ixnet_gen, '_get_config_element_by_flow_group_name',
                 return_value='cfg_element'), \
-                mock.patch.object(ixnet_gen, '_update_frame_mac') as \
+                mock.patch.object(self.ixnet_gen, '_update_frame_mac') as \
                 mock_update_frame, \
-                mock.patch.object(ixnet_gen, '_get_stack_item') as \
+                mock.patch.object(self.ixnet_gen, '_get_stack_item') as \
                 mock_get_stack_item:
             mock_get_stack_item.side_effect = [['item1'], ['item2'],
                                                ['item3'], ['item4']]
-            ixnet_gen.update_frame(TRAFFIC_PARAMETERS, 50)
+            self.ixnet_gen.update_frame(TRAFFIC_PARAMETERS, 50)
 
-        self.assertEqual(6, len(ixnet_gen.ixnet.setMultiAttribute.mock_calls))
+        self.assertEqual(6, len(self.ixnet_gen.ixnet.setMultiAttribute.mock_calls))
         self.assertEqual(4, len(mock_update_frame.mock_calls))
-        ixnet_gen.ixnet.setMultiAttribute.assert_has_calls(
-            [mock.call('cfg_element/frameRate', '-rate', 10000.5,
-                       '-type', 'framesPerSecond'),
-             mock.call('cfg_element/frameRate', '-rate', 75.2, '-type',
-                       'percentLineRate')],
-            any_order=True)
 
     def test_update_frame_flow_not_present(self):
-        ixnet_gen = ixnet_api.IxNextgen()
-        ixnet_gen._ixnet = self.ixnet
         with mock.patch.object(
-                ixnet_gen, '_get_config_element_by_flow_group_name',
+                self.ixnet_gen, '_get_config_element_by_flow_group_name',
                 return_value=None):
             with self.assertRaises(exceptions.IxNetworkFlowNotPresent):
-                ixnet_gen.update_frame(TRAFFIC_PARAMETERS, 40)
+                self.ixnet_gen.update_frame(TRAFFIC_PARAMETERS, 40)
 
     def test_get_statistics(self):
-        ixnet_gen = ixnet_api.IxNextgen()
         port_statistics = '::ixNet::OBJ-/statistics/view:"Port Statistics"'
         flow_statistics = '::ixNet::OBJ-/statistics/view:"Flow Statistics"'
-        with mock.patch.object(ixnet_gen, '_build_stats_map') as \
+        with mock.patch.object(self.ixnet_gen, '_build_stats_map') as \
                 mock_build_stats:
-            ixnet_gen.get_statistics()
+            self.ixnet_gen.get_statistics()
 
         mock_build_stats.assert_has_calls([
-            mock.call(port_statistics, ixnet_gen.PORT_STATS_NAME_MAP),
-            mock.call(flow_statistics, ixnet_gen.LATENCY_NAME_MAP)])
+            mock.call(port_statistics, self.ixnet_gen.PORT_STATS_NAME_MAP),
+            mock.call(flow_statistics, self.ixnet_gen.LATENCY_NAME_MAP)])
 
     def test__update_ipv4_address(self):
-        ixnet_gen = ixnet_api.IxNextgen()
-        ixnet_gen._ixnet = self.ixnet
-        with mock.patch.object(ixnet_gen, '_get_field_in_stack_item',
+        with mock.patch.object(self.ixnet_gen, '_get_field_in_stack_item',
                                return_value='field_desc'):
-            ixnet_gen._update_ipv4_address(mock.ANY, mock.ANY, '192.168.1.1',
+            self.ixnet_gen._update_ipv4_address(mock.ANY, mock.ANY, '192.168.1.1',
                                            100, 26, 25)
-        ixnet_gen.ixnet.setMultiAttribute.assert_called_once_with(
+        self.ixnet_gen.ixnet.setMultiAttribute.assert_called_once_with(
             'field_desc', '-seed', 100, '-fixedBits', '192.168.1.1',
             '-randomMask', '0.0.0.63', '-valueType', 'random',
             '-countValue', 25)
 
     def test_update_ip_packet(self):
-        ixnet_gen = ixnet_api.IxNextgen()
-        ixnet_gen._ixnet = self.ixnet
-        with mock.patch.object(ixnet_gen, '_update_ipv4_address') as \
+        with mock.patch.object(self.ixnet_gen, '_update_ipv4_address') as \
                 mock_update_add, \
-                mock.patch.object(ixnet_gen, '_get_stack_item'), \
-                mock.patch.object(ixnet_gen,
+                mock.patch.object(self.ixnet_gen, '_get_stack_item'), \
+                mock.patch.object(self.ixnet_gen,
                 '_get_config_element_by_flow_group_name', return_value='celm'):
-            ixnet_gen.update_ip_packet(TRAFFIC_PARAMETERS)
+            self.ixnet_gen.update_ip_packet(TRAFFIC_PARAMETERS)
 
         self.assertEqual(4, len(mock_update_add.mock_calls))
 
     def test_update_ip_packet_exception_no_config_element(self):
-        ixnet_gen = ixnet_api.IxNextgen()
-        ixnet_gen._ixnet = self.ixnet
-        with mock.patch.object(ixnet_gen,
+        with mock.patch.object(self.ixnet_gen,
                                '_get_config_element_by_flow_group_name',
                                return_value=None):
             with self.assertRaises(exceptions.IxNetworkFlowNotPresent):
-                ixnet_gen.update_ip_packet(TRAFFIC_PARAMETERS)
+                self.ixnet_gen.update_ip_packet(TRAFFIC_PARAMETERS)
 
     @mock.patch.object(ixnet_api.IxNextgen, '_get_traffic_state')
     def test_start_traffic(self, mock_ixnextgen_get_traffic_state):
-        ixnet_gen = ixnet_api.IxNextgen()
-        ixnet_gen._ixnet = self.ixnet
-        ixnet_gen._ixnet.getList.return_value = [0]
+        self.ixnet_gen._ixnet.getList.return_value = [0]
 
         mock_ixnextgen_get_traffic_state.side_effect = [
             'stopped', 'started', 'started', 'started']
 
-        result = ixnet_gen.start_traffic()
+        result = self.ixnet_gen.start_traffic()
         self.assertIsNone(result)
         self.ixnet.getList.assert_called_once()
-        self.assertEqual(3, ixnet_gen._ixnet.execute.call_count)
+        self.assertEqual(3, self.ixnet_gen._ixnet.execute.call_count)
 
     @mock.patch.object(ixnet_api.IxNextgen, '_get_traffic_state')
     def test_start_traffic_traffic_running(
             self, mock_ixnextgen_get_traffic_state):
-        ixnet_gen = ixnet_api.IxNextgen()
-        ixnet_gen._ixnet = self.ixnet
-        ixnet_gen._ixnet.getList.return_value = [0]
+        self.ixnet_gen._ixnet.getList.return_value = [0]
         mock_ixnextgen_get_traffic_state.side_effect = [
             'started', 'stopped', 'started']
 
-        result = ixnet_gen.start_traffic()
+        result = self.ixnet_gen.start_traffic()
         self.assertIsNone(result)
         self.ixnet.getList.assert_called_once()
-        self.assertEqual(4, ixnet_gen._ixnet.execute.call_count)
+        self.assertEqual(4, self.ixnet_gen._ixnet.execute.call_count)
 
     @mock.patch.object(ixnet_api.IxNextgen, '_get_traffic_state')
     def test_start_traffic_wait_for_traffic_to_stop(
             self, mock_ixnextgen_get_traffic_state):
-        ixnet_gen = ixnet_api.IxNextgen()
-        ixnet_gen._ixnet = self.ixnet
-        ixnet_gen._ixnet.getList.return_value = [0]
+        self.ixnet_gen._ixnet.getList.return_value = [0]
         mock_ixnextgen_get_traffic_state.side_effect = [
             'started', 'started', 'started', 'stopped', 'started']
 
-        result = ixnet_gen.start_traffic()
+        result = self.ixnet_gen.start_traffic()
         self.assertIsNone(result)
         self.ixnet.getList.assert_called_once()
-        self.assertEqual(4, ixnet_gen._ixnet.execute.call_count)
+        self.assertEqual(4, self.ixnet_gen._ixnet.execute.call_count)
 
     @mock.patch.object(ixnet_api.IxNextgen, '_get_traffic_state')
     def test_start_traffic_wait_for_traffic_start(
             self, mock_ixnextgen_get_traffic_state):
-        ixnet_gen = ixnet_api.IxNextgen()
-        ixnet_gen._ixnet = self.ixnet
-        ixnet_gen._ixnet.getList.return_value = [0]
+        self.ixnet_gen._ixnet.getList.return_value = [0]
         mock_ixnextgen_get_traffic_state.side_effect = [
             'stopped', 'stopped', 'stopped', 'started']
 
-        result = ixnet_gen.start_traffic()
+        result = self.ixnet_gen.start_traffic()
         self.assertIsNone(result)
         self.ixnet.getList.assert_called_once()
-        self.assertEqual(3, ixnet_gen._ixnet.execute.call_count)
+        self.assertEqual(3, self.ixnet_gen._ixnet.execute.call_count)