Created new exception classes for networks.

Raising NetworkSettingsError in NetworkSettings, SubnetSettingsError in
SubnetSettings and PortSettingsError in PortSettings instead of Exception.

JIRA: SNAPS-134

Change-Id: I724d9e115e41767a9e3596d85db2a20ee8de5f73
Signed-off-by: spisarski <s.pisarski@cablelabs.com>

2 files changed, 44 insertions, 21 deletions

diff --git a/snaps/openstack/create_network.py b/snaps/openstack/create_network.py
index ad91a52..4f27eec 100644
--- a/snaps/openstack/create_network.py
+++ b/snaps/openstack/create_network.py
@@ -189,7 +189,8 @@ class NetworkSettings:
                         SubnetSettings(**subnet_config['subnet']))
 
         if not self.name or len(self.name) < 1:
-            raise Exception('Name required for networks')
+            raise NetworkSettingsError('Name required for networks')
+            raise NetworkSettingsError('Name required for networks')
 
     def get_project_id(self, os_creds):
         """
@@ -232,7 +233,7 @@ class NetworkSettings:
             if project_id:
                 out['project_id'] = project_id
             else:
-                raise Exception(
+                raise NetworkSettingsError(
                     'Could not find project ID for project named - ' +
                     self.project_name)
         if self.network_type:
@@ -244,6 +245,12 @@ class NetworkSettings:
         return {'network': out}
 
 
+class NetworkSettingsError(Exception):
+    """
+    Exception to be thrown when networks settings attributes are incorrect
+    """
+
+
 class SubnetSettings:
     """
     Class representing a subnet configuration
@@ -286,9 +293,10 @@ class SubnetSettings:
                              dhcpv6-stateless, or slaac.
         :param ipv6_address_mode: A valid value is dhcpv6-stateful,
                                   dhcpv6-stateless, or slaac.
-        :raise: Exception when config does not have or cidr values are None
+        :raise: SubnetSettingsError when config does not have or cidr values
+                are None
         """
-        self.cidr = kwargs['cidr']
+        self.cidr = kwargs.get('cidr')
         if kwargs.get('ip_version'):
             self.ip_version = kwargs['ip_version']
         else:
@@ -314,7 +322,7 @@ class SubnetSettings:
         self.ipv6_address_mode = kwargs.get('ipv6_address_mode')
 
         if not self.name or not self.cidr:
-            raise Exception('Name and cidr required for subnets')
+            raise SubnetSettingsError('Name and cidr required for subnets')
 
     def dict_for_neutron(self, os_creds, network=None):
         """
@@ -344,7 +352,7 @@ class SubnetSettings:
             if project_id:
                 out['project_id'] = project_id
             else:
-                raise Exception(
+                raise SubnetSettingsError(
                     'Could not find project ID for project named - ' +
                     self.project_name)
         if self.start and self.end:
@@ -368,6 +376,12 @@ class SubnetSettings:
         return out
 
 
+class SubnetSettingsError(Exception):
+    """
+    Exception to be thrown when subnet settings attributes are incorrect
+    """
+
+
 class PortSettings:
     """
     Class representing a port configuration
@@ -435,7 +449,7 @@ class PortSettings:
         self.device_id = kwargs.get('device_id')
 
         if not self.name or not self.network_name:
-            raise Exception(
+            raise PortSettingsError(
                 'The attributes neutron, name, and network_name are required '
                 'for PortSettings')
 
@@ -456,7 +470,7 @@ class PortSettings:
                     self.fixed_ips.append({'ip_address': ip_addr_dict['ip'],
                                            'subnet_id': subnet.id})
                 else:
-                    raise Exception(
+                    raise PortSettingsError(
                         'Invalid port configuration, subnet does not exist '
                         'with name - ' + ip_addr_dict['subnet_name'])
 
@@ -487,7 +501,7 @@ class PortSettings:
                                                      self.network_name,
                                                      project_id)
         if not self.network:
-            raise Exception(
+            raise PortSettingsError(
                 'Cannot locate network with name - ' + self.network_name)
 
         out['network_id'] = self.network.id
@@ -500,7 +514,7 @@ class PortSettings:
             if project_id:
                 out['project_id'] = project_id
             else:
-                raise Exception(
+                raise PortSettingsError(
                     'Could not find project ID for project named - ' +
                     self.project_name)
         if self.mac_address:
@@ -535,3 +549,9 @@ class PortSettings:
                 self.opt_name == other.opt_name and
                 self.device_owner == other.device_owner and
                 self.device_id == other.device_id)
+
+
+class PortSettingsError(Exception):
+    """
+    Exception to be thrown when port settings attributes are incorrect
+    """
diff --git a/snaps/openstack/tests/create_network_tests.py b/snaps/openstack/tests/create_network_tests.py
index e22f8bf..322d383 100644
--- a/snaps/openstack/tests/create_network_tests.py
+++ b/snaps/openstack/tests/create_network_tests.py
@@ -17,7 +17,10 @@ import uuid
 
 from snaps.openstack import create_router
 from snaps.openstack.create_network import (OpenStackNetwork, NetworkSettings,
-                                            SubnetSettings, PortSettings)
+                                            SubnetSettings, PortSettings,
+                                            NetworkSettingsError,
+                                            SubnetSettingsError,
+                                            PortSettingsError)
 from snaps.openstack.tests import openstack_tests
 from snaps.openstack.tests.os_source_file_test import (OSIntegrationTestCase,
                                                        OSComponentTestCase)
@@ -33,11 +36,11 @@ class NetworkSettingsUnitTests(unittest.TestCase):
     """
 
     def test_no_params(self):
-        with self.assertRaises(Exception):
+        with self.assertRaises(NetworkSettingsError):
             NetworkSettings()
 
     def test_empty_config(self):
-        with self.assertRaises(Exception):
+        with self.assertRaises(NetworkSettingsError):
             NetworkSettings(**dict())
 
     def test_name_only(self):
@@ -102,19 +105,19 @@ class SubnetSettingsUnitTests(unittest.TestCase):
     """
 
     def test_no_params(self):
-        with self.assertRaises(Exception):
+        with self.assertRaises(SubnetSettingsError):
             SubnetSettings()
 
     def test_empty_config(self):
-        with self.assertRaises(Exception):
+        with self.assertRaises(SubnetSettingsError):
             SubnetSettings(**dict())
 
     def test_name_only(self):
-        with self.assertRaises(Exception):
+        with self.assertRaises(SubnetSettingsError):
             SubnetSettings(name='foo')
 
     def test_config_with_name_only(self):
-        with self.assertRaises(Exception):
+        with self.assertRaises(SubnetSettingsError):
             SubnetSettings(**{'name': 'foo'})
 
     def test_name_cidr_only(self):
@@ -216,19 +219,19 @@ class PortSettingsUnitTests(unittest.TestCase):
     """
 
     def test_no_params(self):
-        with self.assertRaises(Exception):
+        with self.assertRaises(PortSettingsError):
             PortSettings()
 
     def test_empty_config(self):
-        with self.assertRaises(Exception):
+        with self.assertRaises(PortSettingsError):
             PortSettings(**dict())
 
     def test_name_only(self):
-        with self.assertRaises(Exception):
+        with self.assertRaises(PortSettingsError):
             PortSettings(name='foo')
 
     def test_config_name_only(self):
-        with self.assertRaises(Exception):
+        with self.assertRaises(PortSettingsError):
             PortSettings(**{'name': 'foo'})
 
     def test_name_netname_only(self):