check the interface type in the request

check for interface type while creating l2-gateway.
it should be list of dict.if not raise an appropriate message.

for ex: request body for l2-gateway-create is as below.
{"l2_gateway": {"name": "gw2", "devices": [{"interfaces": [{"name": "i1"}]}, "device_name": "switch2"}]}'

Change-Id: I65430efa1a3ed4416e649f0377d9dff7fafc5b57
Closes-Bug: 1548361

networking_l2gw/services/l2gateway/common/l2gw_validators.py

@@ -41,7 +41,13 @@ def validate_gwdevice_list(data, valid_values=None):
             if not interface_data:
                 msg = _("Cannot create a gateway with an empty interfaces")
                 return msg
+            if not isinstance(interface_data, list):
+                msg = _("interfaces format is not a type list of dicts")
+                return msg
             for int_dict in interface_data:
+                if not isinstance(int_dict, dict):
+                    msg = _("interfaces format is not a type dict")
+                    return msg
                 err_msg = attributes._validate_dict(int_dict, None)
                 if not int_dict.get('name'):
                     msg = _("Cannot create a gateway with an empty "

networking_l2gw/tests/unit/services/l2gateway/common/test_l2gw_validators.py

@@ -0,0 +1,112 @@
+# Copyright (c) 2016 OpenStack 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.
+
+from neutron.common import exceptions
+from neutron.tests import base
+
+from networking_l2gw.services.l2gateway.common import l2gw_validators
+
+
+class TestL2gwValidators(base.BaseTestCase):
+
+    def test_validate_gwdevice_list(self):
+        ret_msg = l2gw_validators.validate_gwdevice_list(None)
+        msg = "Cannot create a gateway with an empty device list"
+        self.assertEqual(msg, ret_msg)
+
+    def test_for_empty_device_name(self):
+        test_device = [{"interfaces": "port"}]
+        ret_msg = l2gw_validators.validate_gwdevice_list(test_device)
+        msg = "Cannot create a gateway with an empty device_name"
+        self.assertEqual(msg, ret_msg)
+
+    def test_for_empty_interface(self):
+        test_device = [{"device_name": "switch1"}]
+        ret_msg = l2gw_validators.validate_gwdevice_list(test_device)
+        msg = "Cannot create a gateway with an empty interfaces"
+        self.assertEqual(msg, ret_msg)
+
+    def test_for_interfaces_type_list_of_dicts(self):
+        test_device = [{"device_name": "switch1", "interfaces": "port"}]
+        ret_msg = l2gw_validators.validate_gwdevice_list(test_device)
+        msg = "interfaces format is not a type list of dicts"
+        self.assertEqual(msg, ret_msg)
+
+    def test_for_interface_type_dict(self):
+        test_device = [{"device_name": "switch1", "interfaces": ["port"]}]
+        ret_msg = l2gw_validators.validate_gwdevice_list(test_device)
+        msg = "interfaces format is not a type dict"
+        self.assertEqual(msg, ret_msg)
+
+    def test_for_empty_interface_name(self):
+        test_device = [{"device_name": "switch1",
+                        "interfaces": [{'name': ""}]}]
+        ret_msg = l2gw_validators.validate_gwdevice_list(test_device)
+        msg = "Cannot create a gateway with an empty interface name"
+        self.assertEqual(msg, ret_msg)
+
+    def test_segmentation_id_in_interface(self):
+        test_device = [{"device_name": "switch1",
+                        "interfaces": [{'name': "i1", 'segmentation_id': ''}]}]
+        ret_msg = l2gw_validators.validate_gwdevice_list(test_device)
+        msg = "segmentation_id_list should not be empty"
+        self.assertEqual(msg, ret_msg)
+
+    def test_segmentation_id_type(self):
+        test_device = [{"device_name": "switch1",
+                        "interfaces": [{'name': "i1",
+                                        'segmentation_id': '67'}]}]
+        ret_msg = l2gw_validators.validate_gwdevice_list(test_device)
+        msg = "segmentation_id type should be of list type "
+        self.assertEqual(msg, ret_msg)
+
+    def test_validate_network_mapping_list_with_seg_id(self):
+        network_mapping = {'segmentation_id': 67}
+        check_vlan = True
+        self.assertRaises(exceptions.InvalidInput,
+                          l2gw_validators.validate_network_mapping_list,
+                          network_mapping, check_vlan)
+
+    def test_validate_network_mapping_list_without_seg_id(self):
+        network_mapping = {'segmentation_id': ''}
+        check_vlan = False
+        self.assertRaises(exceptions.InvalidInput,
+                          l2gw_validators.validate_network_mapping_list,
+                          network_mapping, check_vlan)
+
+    def test_validate_network_mapping_list_for_empty_network_id(self):
+        network_mapping = {'segmentation_id': '', 'network_id': ''}
+        check_vlan = True
+        self.assertRaises(exceptions.InvalidInput,
+                          l2gw_validators.validate_network_mapping_list,
+                          network_mapping, check_vlan)
+
+    def test_is_valid_vlan_id_for_non_integer_value(self):
+        seg_id = 'a'
+        self.assertRaises(exceptions.InvalidInput,
+                          l2gw_validators.is_valid_vlan_id,
+                          seg_id)
+
+    def test_is_valid_vlan_id_for_value_less_than_0(self):
+        seg_id = -1
+        self.assertRaises(exceptions.InvalidInput,
+                          l2gw_validators.is_valid_vlan_id,
+                          seg_id)
+
+    def test_is_valid_vlan_id_for_value_greater_than_4095(self):
+        seg_id = 4096
+        self.assertRaises(exceptions.InvalidInput,
+                          l2gw_validators.is_valid_vlan_id,
+                          seg_id)