from django.core.exceptions import ValidationError from django.test import TestCase, override_settings from netaddr import IPNetwork, IPSet from utilities.data import string_to_ranges from ipam.choices import * from ipam.models import * class TestAggregate(TestCase): def test_get_utilization(self): rir = RIR.objects.create(name='RIR 1', slug='rir-1') aggregate = Aggregate(prefix=IPNetwork('10.0.0.0/8'), rir=rir) aggregate.save() # 25% utilization Prefix.objects.bulk_create(( Prefix(prefix=IPNetwork('10.0.0.0/12')), Prefix(prefix=IPNetwork('10.16.0.0/12')), Prefix(prefix=IPNetwork('10.32.0.0/12')), Prefix(prefix=IPNetwork('10.48.0.0/12')), )) self.assertEqual(aggregate.get_utilization(), 25) # 50% utilization Prefix.objects.bulk_create(( Prefix(prefix=IPNetwork('10.64.0.0/10')), )) self.assertEqual(aggregate.get_utilization(), 50) # 100% utilization Prefix.objects.bulk_create(( Prefix(prefix=IPNetwork('10.128.0.0/9')), )) self.assertEqual(aggregate.get_utilization(), 100) class TestPrefix(TestCase): def test_get_duplicates(self): prefixes = Prefix.objects.bulk_create(( Prefix(prefix=IPNetwork('192.0.2.0/24')), Prefix(prefix=IPNetwork('192.0.2.0/24')), Prefix(prefix=IPNetwork('192.0.2.0/24')), )) duplicate_prefix_pks = [p.pk for p in prefixes[0].get_duplicates()] self.assertSetEqual(set(duplicate_prefix_pks), {prefixes[1].pk, prefixes[2].pk}) def test_get_child_prefixes(self): vrfs = VRF.objects.bulk_create(( VRF(name='VRF 1'), VRF(name='VRF 2'), VRF(name='VRF 3'), )) prefixes = Prefix.objects.bulk_create(( Prefix(prefix=IPNetwork('10.0.0.0/16'), status=PrefixStatusChoices.STATUS_CONTAINER), Prefix(prefix=IPNetwork('10.0.0.0/24'), vrf=None), Prefix(prefix=IPNetwork('10.0.1.0/24'), vrf=vrfs[0]), Prefix(prefix=IPNetwork('10.0.2.0/24'), vrf=vrfs[1]), Prefix(prefix=IPNetwork('10.0.3.0/24'), vrf=vrfs[2]), )) child_prefix_pks = {p.pk for p in prefixes[0].get_child_prefixes()} # Global container should return all children self.assertSetEqual(child_prefix_pks, {prefixes[1].pk, prefixes[2].pk, prefixes[3].pk, prefixes[4].pk}) prefixes[0].vrf = vrfs[0] prefixes[0].save() child_prefix_pks = {p.pk for p in prefixes[0].get_child_prefixes()} # VRF container is limited to its own VRF self.assertSetEqual(child_prefix_pks, {prefixes[2].pk}) def test_get_child_ranges(self): prefix = Prefix(prefix='192.168.0.16/28') prefix.save() ranges = IPRange.objects.bulk_create(( IPRange(start_address=IPNetwork('192.168.0.1/24'), end_address=IPNetwork('192.168.0.10/24'), size=10), # No overlap IPRange(start_address=IPNetwork('192.168.0.11/24'), end_address=IPNetwork('192.168.0.17/24'), size=7), # Partial overlap IPRange(start_address=IPNetwork('192.168.0.18/24'), end_address=IPNetwork('192.168.0.23/24'), size=6), # Full overlap IPRange(start_address=IPNetwork('192.168.0.24/24'), end_address=IPNetwork('192.168.0.30/24'), size=7), # Full overlap IPRange(start_address=IPNetwork('192.168.0.31/24'), end_address=IPNetwork('192.168.0.40/24'), size=10), # Partial overlap )) child_ranges = prefix.get_child_ranges() self.assertEqual(len(child_ranges), 2) self.assertEqual(child_ranges[0], ranges[2]) self.assertEqual(child_ranges[1], ranges[3]) def test_get_child_ips(self): vrfs = VRF.objects.bulk_create(( VRF(name='VRF 1'), VRF(name='VRF 2'), VRF(name='VRF 3'), )) parent_prefix = Prefix.objects.create( prefix=IPNetwork('10.0.0.0/16'), status=PrefixStatusChoices.STATUS_CONTAINER ) ips = IPAddress.objects.bulk_create(( IPAddress(address=IPNetwork('10.0.0.1/24'), vrf=None), IPAddress(address=IPNetwork('10.0.1.1/24'), vrf=vrfs[0]), IPAddress(address=IPNetwork('10.0.2.1/24'), vrf=vrfs[1]), IPAddress(address=IPNetwork('10.0.3.1/24'), vrf=vrfs[2]), )) child_ip_pks = {p.pk for p in parent_prefix.get_child_ips()} # Global container should return all children self.assertSetEqual(child_ip_pks, {ips[0].pk, ips[1].pk, ips[2].pk, ips[3].pk}) parent_prefix.vrf = vrfs[0] parent_prefix.save() child_ip_pks = {p.pk for p in parent_prefix.get_child_ips()} # VRF container is limited to its own VRF self.assertSetEqual(child_ip_pks, {ips[1].pk}) def test_get_available_prefixes(self): prefixes = Prefix.objects.bulk_create(( Prefix(prefix=IPNetwork('10.0.0.0/16')), # Parent prefix Prefix(prefix=IPNetwork('10.0.0.0/20')), Prefix(prefix=IPNetwork('10.0.32.0/20')), Prefix(prefix=IPNetwork('10.0.128.0/18')), )) missing_prefixes = IPSet([ IPNetwork('10.0.16.0/20'), IPNetwork('10.0.48.0/20'), IPNetwork('10.0.64.0/18'), IPNetwork('10.0.192.0/18'), ]) available_prefixes = prefixes[0].get_available_prefixes() self.assertEqual(available_prefixes, missing_prefixes) def test_get_available_ips(self): parent_prefix = Prefix.objects.create(prefix=IPNetwork('10.0.0.0/28')) IPAddress.objects.bulk_create(( IPAddress(address=IPNetwork('10.0.0.1/26')), IPAddress(address=IPNetwork('10.0.0.3/26')), IPAddress(address=IPNetwork('10.0.0.5/26')), IPAddress(address=IPNetwork('10.0.0.7/26')), )) IPRange.objects.create( start_address=IPNetwork('10.0.0.9/26'), end_address=IPNetwork('10.0.0.12/26') ) missing_ips = IPSet([ '10.0.0.2/32', '10.0.0.4/32', '10.0.0.6/32', '10.0.0.8/32', '10.0.0.13/32', '10.0.0.14/32', ]) available_ips = parent_prefix.get_available_ips() self.assertEqual(available_ips, missing_ips) def test_get_first_available_prefix(self): prefixes = Prefix.objects.bulk_create(( Prefix(prefix=IPNetwork('10.0.0.0/16')), # Parent prefix Prefix(prefix=IPNetwork('10.0.0.0/24')), Prefix(prefix=IPNetwork('10.0.1.0/24')), Prefix(prefix=IPNetwork('10.0.2.0/24')), )) self.assertEqual(prefixes[0].get_first_available_prefix(), IPNetwork('10.0.3.0/24')) Prefix.objects.create(prefix=IPNetwork('10.0.3.0/24')) self.assertEqual(prefixes[0].get_first_available_prefix(), IPNetwork('10.0.4.0/22')) def test_get_first_available_ip(self): parent_prefix = Prefix.objects.create(prefix=IPNetwork('10.0.0.0/24')) IPAddress.objects.bulk_create(( IPAddress(address=IPNetwork('10.0.0.1/24')), IPAddress(address=IPNetwork('10.0.0.2/24')), IPAddress(address=IPNetwork('10.0.0.3/24')), )) self.assertEqual(parent_prefix.get_first_available_ip(), '10.0.0.4/24') IPAddress.objects.create(address=IPNetwork('10.0.0.4/24')) self.assertEqual(parent_prefix.get_first_available_ip(), '10.0.0.5/24') def test_get_first_available_ip_ipv6(self): parent_prefix = Prefix.objects.create(prefix=IPNetwork('2001:db8:500::/64')) self.assertEqual(parent_prefix.get_first_available_ip(), '2001:db8:500::1/64') def test_get_first_available_ip_ipv6_rfc3627(self): parent_prefix = Prefix.objects.create(prefix=IPNetwork('2001:db8:500:4::/126')) self.assertEqual(parent_prefix.get_first_available_ip(), '2001:db8:500:4::1/126') def test_get_first_available_ip_ipv6_rfc6164(self): parent_prefix = Prefix.objects.create(prefix=IPNetwork('2001:db8:500:5::/127')) self.assertEqual(parent_prefix.get_first_available_ip(), '2001:db8:500:5::/127') def test_get_utilization_container(self): prefixes = ( Prefix(prefix=IPNetwork('10.0.0.0/24'), status=PrefixStatusChoices.STATUS_CONTAINER), Prefix(prefix=IPNetwork('10.0.0.0/26')), Prefix(prefix=IPNetwork('10.0.0.128/26')), ) Prefix.objects.bulk_create(prefixes) self.assertEqual(prefixes[0].get_utilization(), 50) # 50% utilization def test_get_utilization_noncontainer(self): prefix = Prefix.objects.create( prefix=IPNetwork('10.0.0.0/24'), status=PrefixStatusChoices.STATUS_ACTIVE ) # Create 32 child IPs IPAddress.objects.bulk_create([ IPAddress(address=IPNetwork(f'10.0.0.{i}/24')) for i in range(1, 33) ]) self.assertEqual(prefix.get_utilization(), 32 / 254 * 100) # ~12.5% utilization # Create a child range with 32 additional IPs IPRange.objects.create(start_address=IPNetwork('10.0.0.33/24'), end_address=IPNetwork('10.0.0.64/24')) self.assertEqual(prefix.get_utilization(), 64 / 254 * 100) # ~25% utilization # # Uniqueness enforcement tests # @override_settings(ENFORCE_GLOBAL_UNIQUE=False) def test_duplicate_global(self): Prefix.objects.create(prefix=IPNetwork('192.0.2.0/24')) duplicate_prefix = Prefix(prefix=IPNetwork('192.0.2.0/24')) self.assertIsNone(duplicate_prefix.clean()) def test_duplicate_global_unique(self): Prefix.objects.create(prefix=IPNetwork('192.0.2.0/24')) duplicate_prefix = Prefix(prefix=IPNetwork('192.0.2.0/24')) self.assertRaises(ValidationError, duplicate_prefix.clean) def test_duplicate_vrf(self): vrf = VRF.objects.create(name='Test', rd='1:1', enforce_unique=False) Prefix.objects.create(vrf=vrf, prefix=IPNetwork('192.0.2.0/24')) duplicate_prefix = Prefix(vrf=vrf, prefix=IPNetwork('192.0.2.0/24')) self.assertIsNone(duplicate_prefix.clean()) def test_duplicate_vrf_unique(self): vrf = VRF.objects.create(name='Test', rd='1:1', enforce_unique=True) Prefix.objects.create(vrf=vrf, prefix=IPNetwork('192.0.2.0/24')) duplicate_prefix = Prefix(vrf=vrf, prefix=IPNetwork('192.0.2.0/24')) self.assertRaises(ValidationError, duplicate_prefix.clean) class TestPrefixHierarchy(TestCase): """ Test the automatic updating of depth and child count in response to changes made within the prefix hierarchy. """ @classmethod def setUpTestData(cls): prefixes = ( # IPv4 Prefix(prefix='10.0.0.0/8', _depth=0, _children=2), Prefix(prefix='10.0.0.0/16', _depth=1, _children=1), Prefix(prefix='10.0.0.0/24', _depth=2, _children=0), # IPv6 Prefix(prefix='2001:db8::/32', _depth=0, _children=2), Prefix(prefix='2001:db8::/40', _depth=1, _children=1), Prefix(prefix='2001:db8::/48', _depth=2, _children=0), ) Prefix.objects.bulk_create(prefixes) def test_create_prefix4(self): # Create 10.0.0.0/12 Prefix(prefix='10.0.0.0/12').save() prefixes = Prefix.objects.filter(prefix__family=4) self.assertEqual(prefixes[0].prefix, IPNetwork('10.0.0.0/8')) self.assertEqual(prefixes[0]._depth, 0) self.assertEqual(prefixes[0]._children, 3) self.assertEqual(prefixes[1].prefix, IPNetwork('10.0.0.0/12')) self.assertEqual(prefixes[1]._depth, 1) self.assertEqual(prefixes[1]._children, 2) self.assertEqual(prefixes[2].prefix, IPNetwork('10.0.0.0/16')) self.assertEqual(prefixes[2]._depth, 2) self.assertEqual(prefixes[2]._children, 1) self.assertEqual(prefixes[3].prefix, IPNetwork('10.0.0.0/24')) self.assertEqual(prefixes[3]._depth, 3) self.assertEqual(prefixes[3]._children, 0) def test_create_prefix6(self): # Create 2001:db8::/36 Prefix(prefix='2001:db8::/36').save() prefixes = Prefix.objects.filter(prefix__family=6) self.assertEqual(prefixes[0].prefix, IPNetwork('2001:db8::/32')) self.assertEqual(prefixes[0]._depth, 0) self.assertEqual(prefixes[0]._children, 3) self.assertEqual(prefixes[1].prefix, IPNetwork('2001:db8::/36')) self.assertEqual(prefixes[1]._depth, 1) self.assertEqual(prefixes[1]._children, 2) self.assertEqual(prefixes[2].prefix, IPNetwork('2001:db8::/40')) self.assertEqual(prefixes[2]._depth, 2) self.assertEqual(prefixes[2]._children, 1) self.assertEqual(prefixes[3].prefix, IPNetwork('2001:db8::/48')) self.assertEqual(prefixes[3]._depth, 3) self.assertEqual(prefixes[3]._children, 0) def test_update_prefix4(self): # Change 10.0.0.0/24 to 10.0.0.0/12 p = Prefix.objects.get(prefix='10.0.0.0/24') p.prefix = '10.0.0.0/12' p.save() prefixes = Prefix.objects.filter(prefix__family=4) self.assertEqual(prefixes[0].prefix, IPNetwork('10.0.0.0/8')) self.assertEqual(prefixes[0]._depth, 0) self.assertEqual(prefixes[0]._children, 2) self.assertEqual(prefixes[1].prefix, IPNetwork('10.0.0.0/12')) self.assertEqual(prefixes[1]._depth, 1) self.assertEqual(prefixes[1]._children, 1) self.assertEqual(prefixes[2].prefix, IPNetwork('10.0.0.0/16')) self.assertEqual(prefixes[2]._depth, 2) self.assertEqual(prefixes[2]._children, 0) def test_update_prefix6(self): # Change 2001:db8::/48 to 2001:db8::/36 p = Prefix.objects.get(prefix='2001:db8::/48') p.prefix = '2001:db8::/36' p.save() prefixes = Prefix.objects.filter(prefix__family=6) self.assertEqual(prefixes[0].prefix, IPNetwork('2001:db8::/32')) self.assertEqual(prefixes[0]._depth, 0) self.assertEqual(prefixes[0]._children, 2) self.assertEqual(prefixes[1].prefix, IPNetwork('2001:db8::/36')) self.assertEqual(prefixes[1]._depth, 1) self.assertEqual(prefixes[1]._children, 1) self.assertEqual(prefixes[2].prefix, IPNetwork('2001:db8::/40')) self.assertEqual(prefixes[2]._depth, 2) self.assertEqual(prefixes[2]._children, 0) def test_update_prefix_vrf4(self): vrf = VRF(name='VRF A') vrf.save() # Move 10.0.0.0/16 to a VRF p = Prefix.objects.get(prefix='10.0.0.0/16') p.vrf = vrf p.save() prefixes = Prefix.objects.filter(vrf__isnull=True, prefix__family=4) self.assertEqual(prefixes[0].prefix, IPNetwork('10.0.0.0/8')) self.assertEqual(prefixes[0]._depth, 0) self.assertEqual(prefixes[0]._children, 1) self.assertEqual(prefixes[1].prefix, IPNetwork('10.0.0.0/24')) self.assertEqual(prefixes[1]._depth, 1) self.assertEqual(prefixes[1]._children, 0) prefixes = Prefix.objects.filter(vrf=vrf) self.assertEqual(prefixes[0].prefix, IPNetwork('10.0.0.0/16')) self.assertEqual(prefixes[0]._depth, 0) self.assertEqual(prefixes[0]._children, 0) def test_update_prefix_vrf6(self): vrf = VRF(name='VRF A') vrf.save() # Move 2001:db8::/40 to a VRF p = Prefix.objects.get(prefix='2001:db8::/40') p.vrf = vrf p.save() prefixes = Prefix.objects.filter(vrf__isnull=True, prefix__family=6) self.assertEqual(prefixes[0].prefix, IPNetwork('2001:db8::/32')) self.assertEqual(prefixes[0]._depth, 0) self.assertEqual(prefixes[0]._children, 1) self.assertEqual(prefixes[1].prefix, IPNetwork('2001:db8::/48')) self.assertEqual(prefixes[1]._depth, 1) self.assertEqual(prefixes[1]._children, 0) prefixes = Prefix.objects.filter(vrf=vrf) self.assertEqual(prefixes[0].prefix, IPNetwork('2001:db8::/40')) self.assertEqual(prefixes[0]._depth, 0) self.assertEqual(prefixes[0]._children, 0) def test_delete_prefix4(self): # Delete 10.0.0.0/16 Prefix.objects.filter(prefix='10.0.0.0/16').delete() prefixes = Prefix.objects.filter(prefix__family=4) self.assertEqual(prefixes[0].prefix, IPNetwork('10.0.0.0/8')) self.assertEqual(prefixes[0]._depth, 0) self.assertEqual(prefixes[0]._children, 1) self.assertEqual(prefixes[1].prefix, IPNetwork('10.0.0.0/24')) self.assertEqual(prefixes[1]._depth, 1) self.assertEqual(prefixes[1]._children, 0) def test_delete_prefix6(self): # Delete 2001:db8::/40 Prefix.objects.filter(prefix='2001:db8::/40').delete() prefixes = Prefix.objects.filter(prefix__family=6) self.assertEqual(prefixes[0].prefix, IPNetwork('2001:db8::/32')) self.assertEqual(prefixes[0]._depth, 0) self.assertEqual(prefixes[0]._children, 1) self.assertEqual(prefixes[1].prefix, IPNetwork('2001:db8::/48')) self.assertEqual(prefixes[1]._depth, 1) self.assertEqual(prefixes[1]._children, 0) def test_duplicate_prefix4(self): # Duplicate 10.0.0.0/16 Prefix(prefix='10.0.0.0/16').save() prefixes = Prefix.objects.filter(prefix__family=4) self.assertEqual(prefixes[0].prefix, IPNetwork('10.0.0.0/8')) self.assertEqual(prefixes[0]._depth, 0) self.assertEqual(prefixes[0]._children, 3) self.assertEqual(prefixes[1].prefix, IPNetwork('10.0.0.0/16')) self.assertEqual(prefixes[1]._depth, 1) self.assertEqual(prefixes[1]._children, 1) self.assertEqual(prefixes[2].prefix, IPNetwork('10.0.0.0/16')) self.assertEqual(prefixes[2]._depth, 1) self.assertEqual(prefixes[2]._children, 1) self.assertEqual(prefixes[3].prefix, IPNetwork('10.0.0.0/24')) self.assertEqual(prefixes[3]._depth, 2) self.assertEqual(prefixes[3]._children, 0) def test_duplicate_prefix6(self): # Duplicate 2001:db8::/40 Prefix(prefix='2001:db8::/40').save() prefixes = Prefix.objects.filter(prefix__family=6) self.assertEqual(prefixes[0].prefix, IPNetwork('2001:db8::/32')) self.assertEqual(prefixes[0]._depth, 0) self.assertEqual(prefixes[0]._children, 3) self.assertEqual(prefixes[1].prefix, IPNetwork('2001:db8::/40')) self.assertEqual(prefixes[1]._depth, 1) self.assertEqual(prefixes[1]._children, 1) self.assertEqual(prefixes[2].prefix, IPNetwork('2001:db8::/40')) self.assertEqual(prefixes[2]._depth, 1) self.assertEqual(prefixes[2]._children, 1) self.assertEqual(prefixes[3].prefix, IPNetwork('2001:db8::/48')) self.assertEqual(prefixes[3]._depth, 2) self.assertEqual(prefixes[3]._children, 0) class TestIPAddress(TestCase): def test_get_duplicates(self): ips = IPAddress.objects.bulk_create(( IPAddress(address=IPNetwork('192.0.2.1/24')), IPAddress(address=IPNetwork('192.0.2.1/24')), IPAddress(address=IPNetwork('192.0.2.1/24')), )) duplicate_ip_pks = [p.pk for p in ips[0].get_duplicates()] self.assertSetEqual(set(duplicate_ip_pks), {ips[1].pk, ips[2].pk}) # # Uniqueness enforcement tests # @override_settings(ENFORCE_GLOBAL_UNIQUE=False) def test_duplicate_global(self): IPAddress.objects.create(address=IPNetwork('192.0.2.1/24')) duplicate_ip = IPAddress(address=IPNetwork('192.0.2.1/24')) self.assertIsNone(duplicate_ip.clean()) def test_duplicate_global_unique(self): IPAddress.objects.create(address=IPNetwork('192.0.2.1/24')) duplicate_ip = IPAddress(address=IPNetwork('192.0.2.1/24')) self.assertRaises(ValidationError, duplicate_ip.clean) def test_duplicate_vrf(self): vrf = VRF.objects.create(name='Test', rd='1:1', enforce_unique=False) IPAddress.objects.create(vrf=vrf, address=IPNetwork('192.0.2.1/24')) duplicate_ip = IPAddress(vrf=vrf, address=IPNetwork('192.0.2.1/24')) self.assertIsNone(duplicate_ip.clean()) def test_duplicate_vrf_unique(self): vrf = VRF.objects.create(name='Test', rd='1:1', enforce_unique=True) IPAddress.objects.create(vrf=vrf, address=IPNetwork('192.0.2.1/24')) duplicate_ip = IPAddress(vrf=vrf, address=IPNetwork('192.0.2.1/24')) self.assertRaises(ValidationError, duplicate_ip.clean) def test_duplicate_nonunique_nonrole_role(self): IPAddress.objects.create(address=IPNetwork('192.0.2.1/24')) duplicate_ip = IPAddress(address=IPNetwork('192.0.2.1/24'), role=IPAddressRoleChoices.ROLE_VIP) self.assertRaises(ValidationError, duplicate_ip.clean) def test_duplicate_nonunique_role_nonrole(self): IPAddress.objects.create(address=IPNetwork('192.0.2.1/24'), role=IPAddressRoleChoices.ROLE_VIP) duplicate_ip = IPAddress(address=IPNetwork('192.0.2.1/24')) self.assertRaises(ValidationError, duplicate_ip.clean) def test_duplicate_nonunique_role(self): IPAddress.objects.create(address=IPNetwork('192.0.2.1/24'), role=IPAddressRoleChoices.ROLE_VIP) IPAddress.objects.create(address=IPNetwork('192.0.2.1/24'), role=IPAddressRoleChoices.ROLE_VIP) class TestVLANGroup(TestCase): @classmethod def setUpTestData(cls): vlangroup = VLANGroup.objects.create( name='VLAN Group 1', slug='vlan-group-1', vid_ranges=string_to_ranges('100-199'), ) VLAN.objects.bulk_create(( VLAN(name='VLAN 100', vid=100, group=vlangroup), VLAN(name='VLAN 101', vid=101, group=vlangroup), VLAN(name='VLAN 102', vid=102, group=vlangroup), VLAN(name='VLAN 103', vid=103, group=vlangroup), )) def test_get_available_vids(self): vlangroup = VLANGroup.objects.first() child_vids = VLAN.objects.filter(group=vlangroup).values_list('vid', flat=True) self.assertEqual(len(child_vids), 4) available_vids = vlangroup.get_available_vids() self.assertListEqual(available_vids, list(range(104, 200))) def test_get_next_available_vid(self): vlangroup = VLANGroup.objects.first() self.assertEqual(vlangroup.get_next_available_vid(), 104) VLAN.objects.create(name='VLAN 104', vid=104, group=vlangroup) self.assertEqual(vlangroup.get_next_available_vid(), 105) def test_vid_validation(self): vlangroup = VLANGroup.objects.first() vlan = VLAN(vid=1, name='VLAN 1', group=vlangroup) with self.assertRaises(ValidationError): vlan.full_clean() vlan = VLAN(vid=109, name='VLAN 109', group=vlangroup) vlan.full_clean() def test_overlapping_vlan(self): vlangroup = VLANGroup( name='VLAN Group 1', slug='vlan-group-1', vid_ranges=string_to_ranges('2-4,3-5'), ) with self.assertRaises(ValidationError): vlangroup.full_clean() # make sure single vlan range works vlangroup.vid_ranges = string_to_ranges('2-2') vlangroup.full_clean() vlangroup.save()