Created new classes RouterSettingsError & RouterCreationError.

Raising RouterSettingsError in RouterSettings and RouterCreationError in
OpenStackRouter instead of Exception.

JIRA: SNAPS-136

Change-Id: I3ba4824ea80ccfc07b1f15959898936d51bca1de
Signed-off-by: spisarski <s.pisarski@cablelabs.com>

2 files changed, 25 insertions, 12 deletions

diff --git a/snaps/openstack/create_router.py b/snaps/openstack/create_router.py
index db6ffe3..e50009c 100644
--- a/snaps/openstack/create_router.py
+++ b/snaps/openstack/create_router.py
@@ -39,7 +39,7 @@ class OpenStackRouter:
         self.__os_creds = os_creds
 
         if not router_settings:
-            raise Exception('router_settings is required')
+            raise RouterCreationError('router_settings is required')
 
         self.router_settings = router_settings
         self.__neutron = None
@@ -84,7 +84,7 @@ class OpenStackRouter:
                     self.__internal_router_interface = neutron_utils.add_interface_router(
                         self.__neutron, self.__router, subnet=internal_subnet)
             else:
-                raise Exception(
+                raise RouterCreationError(
                     'Subnet not found with name ' + internal_subnet_name)
 
         for port_setting in self.router_settings.port_settings:
@@ -108,7 +108,7 @@ class OpenStackRouter:
                                                        self.__router,
                                                        port=port)
                 else:
-                    raise Exception(
+                    raise RouterCreationError(
                         'Error creating port with name - ' + port_setting.name)
 
         return self.__router
@@ -163,6 +163,12 @@ class OpenStackRouter:
         return self.__internal_router_interface
 
 
+class RouterCreationError(Exception):
+    """
+    Exception to be thrown when an router instance cannot be created
+    """
+
+
 class RouterSettings:
     """
     Class representing a router configuration
@@ -209,7 +215,7 @@ class RouterSettings:
                         PortSettings(**interface['port']))
 
         if not self.name:
-            raise Exception('Name is required')
+            raise RouterSettingsError('Name is required')
 
     def dict_for_neutron(self, neutron, os_creds):
         """
@@ -239,7 +245,7 @@ class RouterSettings:
             if project_id:
                 out['project_id'] = project_id
             else:
-                raise Exception(
+                raise RouterSettingsError(
                     'Could not find project ID for project named - ' +
                     self.project_name)
         if self.admin_state_up is not None:
@@ -251,7 +257,7 @@ class RouterSettings:
                 ext_gw['network_id'] = ext_net.id
                 out['external_gateway_info'] = ext_gw
             else:
-                raise Exception(
+                raise RouterSettingsError(
                     'Could not find the external network named - ' +
                     self.external_gateway)
 
@@ -259,3 +265,9 @@ class RouterSettings:
         # TODO: Add external_fixed_ips Tests
 
         return {'router': out}
+
+
+class RouterSettingsError(Exception):
+    """
+    Exception to be thrown when router settings attributes are incorrect
+    """
diff --git a/snaps/openstack/tests/create_router_tests.py b/snaps/openstack/tests/create_router_tests.py
index 5f2534d..efa0993 100644
--- a/snaps/openstack/tests/create_router_tests.py
+++ b/snaps/openstack/tests/create_router_tests.py
@@ -1,4 +1,4 @@
-# Copyright (c) 2016 Cable Television Laboratories, Inc. ("CableLabs")
+# Copyright (c) 2017 Cable Television Laboratories, Inc. ("CableLabs")
 #                    and others.  All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
@@ -20,7 +20,8 @@ from snaps.openstack import create_router
 from snaps.openstack.create_network import (
     NetworkSettings, PortSettings)
 from snaps.openstack.create_network import OpenStackNetwork
-from snaps.openstack.create_router import RouterSettings
+from snaps.openstack.create_router import (
+    RouterSettings, RouterSettingsError, RouterCreationError)
 from snaps.openstack.tests.os_source_file_test import OSIntegrationTestCase
 from snaps.openstack.utils import neutron_utils
 
@@ -38,11 +39,11 @@ class RouterSettingsUnitTests(unittest.TestCase):
     """
 
     def test_no_params(self):
-        with self.assertRaises(Exception):
+        with self.assertRaises(RouterSettingsError):
             RouterSettings()
 
     def test_empty_config(self):
-        with self.assertRaises(Exception):
+        with self.assertRaises(RouterSettingsError):
             RouterSettings(**dict())
 
     def test_name_only(self):
@@ -338,7 +339,7 @@ class CreateRouterNegativeTests(OSIntegrationTestCase):
         """
         Test creating a router without a name.
         """
-        with self.assertRaises(Exception):
+        with self.assertRaises(RouterSettingsError):
             router_settings = RouterSettings(
                 name=None, external_gateway=self.ext_net_name)
             self.router_creator = create_router.OpenStackRouter(
@@ -349,7 +350,7 @@ class CreateRouterNegativeTests(OSIntegrationTestCase):
         """
         Test creating a router without a valid network gateway name.
         """
-        with self.assertRaises(Exception):
+        with self.assertRaises(RouterSettingsError):
             router_settings = RouterSettings(name=self.guid + '-pub-router',
                                              external_gateway="Invalid_name")
             self.router_creator = create_router.OpenStackRouter(