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  # Copyright (c) 2013 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.
  
  import mock
  from oslo.config import cfg
  
  import neutron.db.api as ndb
  from neutron.plugins.ml2.drivers.mech_arista import db
  from neutron.plugins.ml2.drivers.mech_arista import exceptions as arista_exc
  from neutron.plugins.ml2.drivers.mech_arista import mechanism_arista as arista
  from neutron.tests import base
  
  
  def setup_arista_wrapper_config(value=''):
      cfg.CONF.keystone_authtoken = fake_keystone_info_class()
      cfg.CONF.set_override('eapi_host', value, "ml2_arista")
      cfg.CONF.set_override('eapi_username', value, "ml2_arista")
  
  
  def setup_valid_config():
      # Config is not valid if value is not set
      setup_arista_wrapper_config('value')
  
  
  class AristaProvisionedVlansStorageTestCase(base.BaseTestCase):
      """Test storing and retriving functionality of Arista mechanism driver.
  
      Tests all methods of this class by invoking them seperately as well
      as a goup.
      """
  
      def setUp(self):
          super(AristaProvisionedVlansStorageTestCase, self).setUp()
          ndb.configure_db()
          self.addCleanup(ndb.clear_db)
  
      def test_tenant_is_remembered(self):
          tenant_id = 'test'
  
          db.remember_tenant(tenant_id)
          net_provisioned = db.is_tenant_provisioned(tenant_id)
          self.assertTrue(net_provisioned, 'Tenant must be provisioned')
  
      def test_tenant_is_removed(self):
          tenant_id = 'test'
  
          db.remember_tenant(tenant_id)
          db.forget_tenant(tenant_id)
          net_provisioned = db.is_tenant_provisioned(tenant_id)
          self.assertFalse(net_provisioned, 'The Tenant should be deleted')
  
      def test_network_is_remembered(self):
          tenant_id = 'test'
          network_id = '123'
          segmentation_id = 456
  
          db.remember_network(tenant_id, network_id, segmentation_id)
          net_provisioned = db.is_network_provisioned(tenant_id,
                                                      network_id)
          self.assertTrue(net_provisioned, 'Network must be provisioned')
  
      def test_network_is_removed(self):
          tenant_id = 'test'
          network_id = '123'
  
          db.remember_network(tenant_id, network_id, '123')
          db.forget_network(tenant_id, network_id)
          net_provisioned = db.is_network_provisioned(tenant_id, network_id)
          self.assertFalse(net_provisioned, 'The network should be deleted')
  
      def test_vm_is_remembered(self):
          vm_id = 'VM-1'
          tenant_id = 'test'
          network_id = '123'
          port_id = 456
          host_id = 'ubuntu1'
  
          db.remember_vm(vm_id, host_id, port_id, network_id, tenant_id)
          vm_provisioned = db.is_vm_provisioned(vm_id, host_id, port_id,
                                                network_id, tenant_id)
          self.assertTrue(vm_provisioned, 'VM must be provisioned')
  
      def test_vm_is_removed(self):
          vm_id = 'VM-1'
          tenant_id = 'test'
          network_id = '123'
          port_id = 456
          host_id = 'ubuntu1'
  
          db.remember_vm(vm_id, host_id, port_id, network_id, tenant_id)
          db.forget_vm(vm_id, host_id, port_id, network_id, tenant_id)
          vm_provisioned = db.is_vm_provisioned(vm_id, host_id, port_id,
                                                network_id, tenant_id)
          self.assertFalse(vm_provisioned, 'The vm should be deleted')
  
      def test_remembers_multiple_networks(self):
          tenant_id = 'test'
          expected_num_nets = 100
          nets = ['id%s' % n for n in range(expected_num_nets)]
          for net_id in nets:
              db.remember_network(tenant_id, net_id, 123)
  
          num_nets_provisioned = db.num_nets_provisioned(tenant_id)
          self.assertEqual(expected_num_nets, num_nets_provisioned,
                           'There should be %d nets, not %d' %
                           (expected_num_nets, num_nets_provisioned))
  
      def test_removes_all_networks(self):
          tenant_id = 'test'
          num_nets = 100
          old_nets = db.num_nets_provisioned(tenant_id)
          nets = ['id_%s' % n for n in range(num_nets)]
          for net_id in nets:
              db.remember_network(tenant_id, net_id, 123)
          for net_id in nets:
              db.forget_network(tenant_id, net_id)
  
          num_nets_provisioned = db.num_nets_provisioned(tenant_id)
          expected = old_nets
          self.assertEqual(expected, num_nets_provisioned,
                           'There should be %d nets, not %d' %
                           (expected, num_nets_provisioned))
  
      def test_remembers_multiple_tenants(self):
          expected_num_tenants = 100
          tenants = ['id%s' % n for n in range(expected_num_tenants)]
          for tenant_id in tenants:
              db.remember_tenant(tenant_id)
  
          num_tenants_provisioned = db.num_provisioned_tenants()
          self.assertEqual(expected_num_tenants, num_tenants_provisioned,
                           'There should be %d tenants, not %d' %
                           (expected_num_tenants, num_tenants_provisioned))
  
      def test_removes_multiple_tenants(self):
          num_tenants = 100
          tenants = ['id%s' % n for n in range(num_tenants)]
          for tenant_id in tenants:
              db.remember_tenant(tenant_id)
          for tenant_id in tenants:
              db.forget_tenant(tenant_id)
  
          num_tenants_provisioned = db.num_provisioned_tenants()
          expected = 0
          self.assertEqual(expected, num_tenants_provisioned,
                           'There should be %d tenants, not %d' %
                           (expected, num_tenants_provisioned))
  
      def test_num_vm_is_valid(self):
          tenant_id = 'test'
          network_id = '123'
          port_id = 456
          host_id = 'ubuntu1'
  
          vm_to_remember = ['vm1', 'vm2', 'vm3']
          vm_to_forget = ['vm2', 'vm1']
  
          for vm in vm_to_remember:
              db.remember_vm(vm, host_id, port_id, network_id, tenant_id)
          for vm in vm_to_forget:
              db.forget_vm(vm, host_id, port_id, network_id, tenant_id)
  
          num_vms = len(db.get_vms(tenant_id))
          expected = len(vm_to_remember) - len(vm_to_forget)
  
          self.assertEqual(expected, num_vms,
                           'There should be %d records, '
                           'got %d records' % (expected, num_vms))
          # clean up afterwards
          db.forget_vm('vm3', host_id, port_id, network_id, tenant_id)
  
      def test_get_network_list_returns_eos_compatible_data(self):
          tenant = u'test-1'
          segm_type = 'vlan'
          network_id = u'123'
          network2_id = u'1234'
          vlan_id = 123
          vlan2_id = 1234
          expected_eos_net_list = {network_id: {u'networkId': network_id,
                                                u'segmentationTypeId': vlan_id,
                                                u'segmentationType': segm_type},
                                   network2_id: {u'networkId': network2_id,
                                                 u'segmentationTypeId': vlan2_id,
                                                 u'segmentationType': segm_type}}
  
          db.remember_network(tenant, network_id, vlan_id)
          db.remember_network(tenant, network2_id, vlan2_id)
  
          net_list = db.get_networks(tenant)
          self.assertNotEqual(net_list != expected_eos_net_list, ('%s != %s' %
                              (net_list, expected_eos_net_list)))
  
  
  class PositiveRPCWrapperValidConfigTestCase(base.BaseTestCase):
      """Test cases to test the RPC between Arista Driver and EOS.
  
      Tests all methods used to send commands between Arista Driver and EOS
      """
  
      def setUp(self):
          super(PositiveRPCWrapperValidConfigTestCase, self).setUp()
          setup_valid_config()
          self.drv = arista.AristaRPCWrapper()
          self.region = 'RegionOne'
          self.drv._server = mock.MagicMock()
  
      def test_no_exception_on_correct_configuration(self):
          self.assertIsNotNone(self.drv)
  
      def test_plug_host_into_network(self):
          tenant_id = 'ten-1'
          vm_id = 'vm-1'
          port_id = 123
          network_id = 'net-id'
          host = 'host'
          port_name = '123-port'
  
          self.drv.plug_host_into_network(vm_id, host, port_id,
                                          network_id, tenant_id, port_name)
          cmds = ['enable', 'configure', 'management openstack',
                  'region RegionOne',
                  'tenant ten-1', 'vm id vm-1 hostid host',
                  'port id 123 name "123-port" network-id net-id',
                  'exit', 'exit', 'exit', 'exit']
  
          self.drv._server.runCmds.assert_called_once_with(version=1, cmds=cmds)
  
      def test_plug_dhcp_port_into_network(self):
          tenant_id = 'ten-1'
          vm_id = 'vm-1'
          port_id = 123
          network_id = 'net-id'
          host = 'host'
          port_name = '123-port'
  
          self.drv.plug_dhcp_port_into_network(vm_id, host, port_id,
                                               network_id, tenant_id, port_name)
          cmds = ['enable', 'configure', 'management openstack',
                  'region RegionOne',
                  'tenant ten-1', 'network id net-id',
                  'dhcp id vm-1 hostid host port-id 123 name "123-port"',
                  'exit', 'exit', 'exit']
  
          self.drv._server.runCmds.assert_called_once_with(version=1, cmds=cmds)
  
      def test_unplug_host_from_network(self):
          tenant_id = 'ten-1'
          vm_id = 'vm-1'
          port_id = 123
          network_id = 'net-id'
          host = 'host'
          self.drv.unplug_host_from_network(vm_id, host, port_id,
                                            network_id, tenant_id)
          cmds = ['enable', 'configure', 'management openstack',
                  'region RegionOne',
                  'tenant ten-1', 'vm id vm-1 hostid host',
                  'no port id 123',
                  'exit', 'exit', 'exit', 'exit']
          self.drv._server.runCmds.assert_called_once_with(version=1, cmds=cmds)
  
      def test_unplug_dhcp_port_from_network(self):
          tenant_id = 'ten-1'
          vm_id = 'vm-1'
          port_id = 123
          network_id = 'net-id'
          host = 'host'
  
          self.drv.unplug_dhcp_port_from_network(vm_id, host, port_id,
                                                 network_id, tenant_id)
          cmds = ['enable', 'configure', 'management openstack',
                  'region RegionOne',
                  'tenant ten-1', 'network id net-id',
                  'no dhcp id vm-1 port-id 123',
                  'exit', 'exit', 'exit']
  
          self.drv._server.runCmds.assert_called_once_with(version=1, cmds=cmds)
  
      def test_create_network(self):
          tenant_id = 'ten-1'
          network_id = 'net-id'
          network_name = 'net-name'
          vlan_id = 123
          self.drv.create_network(tenant_id, network_id, network_name, vlan_id)
          cmds = ['enable', 'configure', 'management openstack',
                  'region RegionOne',
                  'tenant ten-1', 'network id net-id name "net-name"',
                  'segment 1 type vlan id 123',
                  'exit', 'exit', 'exit', 'exit', 'exit']
          self.drv._server.runCmds.assert_called_once_with(version=1, cmds=cmds)
  
      def test_delete_network(self):
          tenant_id = 'ten-1'
          network_id = 'net-id'
          self.drv.delete_network(tenant_id, network_id)
          cmds = ['enable', 'configure', 'management openstack',
                  'region RegionOne',
                  'tenant ten-1', 'no network id net-id',
                  'exit', 'exit', 'exit', 'exit']
          self.drv._server.runCmds.assert_called_once_with(version=1, cmds=cmds)
  
      def test_delete_vm(self):
          tenant_id = 'ten-1'
          vm_id = 'vm-id'
          self.drv.delete_vm(tenant_id, vm_id)
          cmds = ['enable', 'configure', 'management openstack',
                  'region RegionOne',
                  'tenant ten-1', 'no vm id vm-id',
                  'exit', 'exit', 'exit', 'exit']
          self.drv._server.runCmds.assert_called_once_with(version=1, cmds=cmds)
  
      def test_delete_tenant(self):
          tenant_id = 'ten-1'
          self.drv.delete_tenant(tenant_id)
          cmds = ['enable', 'configure', 'management openstack',
                  'region RegionOne', 'no tenant ten-1',
                  'exit', 'exit', 'exit']
          self.drv._server.runCmds.assert_called_once_with(version=1, cmds=cmds)
  
      def test_get_network_info_returns_none_when_no_such_net(self):
          expected = []
          self.drv.get_tenants = mock.MagicMock()
          self.drv.get_tenants.return_value = []
  
          net_info = self.drv.get_tenants()
  
          self.drv.get_tenants.assert_called_once_with()
          self.assertEqual(net_info, expected, ('Network info must be "None"'
                                                'for unknown network'))
  
      def test_get_network_info_returns_info_for_available_net(self):
          valid_network_id = '12345'
          valid_net_info = {'network_id': valid_network_id,
                            'some_info': 'net info'}
          known_nets = valid_net_info
  
          self.drv.get_tenants = mock.MagicMock()
          self.drv.get_tenants.return_value = known_nets
  
          net_info = self.drv.get_tenants()
          self.assertEqual(net_info, valid_net_info,
                           ('Must return network info for a valid net'))
  
  
  class AristaRPCWrapperInvalidConfigTestCase(base.BaseTestCase):
      """Negative test cases to test the Arista Driver configuration."""
  
      def setUp(self):
          super(AristaRPCWrapperInvalidConfigTestCase, self).setUp()
          self.setup_invalid_config()  # Invalid config, required options not set
  
      def setup_invalid_config(self):
          setup_arista_wrapper_config('')
  
      def test_raises_exception_on_wrong_configuration(self):
          self.assertRaises(arista_exc.AristaConfigError,
                            arista.AristaRPCWrapper)
  
  
  class NegativeRPCWrapperTestCase(base.BaseTestCase):
      """Negative test cases to test the RPC between Arista Driver and EOS."""
  
      def setUp(self):
          super(NegativeRPCWrapperTestCase, self).setUp()
          setup_valid_config()
  
      def test_exception_is_raised_on_json_server_error(self):
          drv = arista.AristaRPCWrapper()
  
          drv._server = mock.MagicMock()
          drv._server.runCmds.side_effect = Exception('server error')
          self.assertRaises(arista_exc.AristaRpcError, drv.get_tenants)
  
  
  class RealNetStorageAristaDriverTestCase(base.BaseTestCase):
      """Main test cases for Arista Mechanism driver.
  
      Tests all mechanism driver APIs supported by Arista Driver. It invokes
      all the APIs as they would be invoked in real world scenarios and
      verifies the functionality.
      """
      def setUp(self):
          super(RealNetStorageAristaDriverTestCase, self).setUp()
          self.fake_rpc = mock.MagicMock()
          ndb.configure_db()
          self.drv = arista.AristaDriver(self.fake_rpc)
  
      def tearDown(self):
          super(RealNetStorageAristaDriverTestCase, self).tearDown()
          self.drv.stop_synchronization_thread()
  
      def test_create_and_delete_network(self):
          tenant_id = 'ten-1'
          network_id = 'net1-id'
          segmentation_id = 1001
  
          network_context = self._get_network_context(tenant_id,
                                                      network_id,
                                                      segmentation_id)
          self.drv.create_network_precommit(network_context)
          net_provisioned = db.is_network_provisioned(tenant_id, network_id)
          self.assertTrue(net_provisioned, 'The network should be created')
  
          expected_num_nets = 1
          num_nets_provisioned = db.num_nets_provisioned(tenant_id)
          self.assertEqual(expected_num_nets, num_nets_provisioned,
                           'There should be %d nets, not %d' %
                           (expected_num_nets, num_nets_provisioned))
  
          #Now test the delete network
          self.drv.delete_network_precommit(network_context)
          net_provisioned = db.is_network_provisioned(tenant_id, network_id)
          self.assertFalse(net_provisioned, 'The network should be created')
  
          expected_num_nets = 0
          num_nets_provisioned = db.num_nets_provisioned(tenant_id)
          self.assertEqual(expected_num_nets, num_nets_provisioned,
                           'There should be %d nets, not %d' %
                           (expected_num_nets, num_nets_provisioned))
  
      def test_create_and_delete_multiple_networks(self):
          tenant_id = 'ten-1'
          expected_num_nets = 100
          segmentation_id = 1001
          nets = ['id%s' % n for n in range(expected_num_nets)]
          for net_id in nets:
              network_context = self._get_network_context(tenant_id,
                                                          net_id,
                                                          segmentation_id)
              self.drv.create_network_precommit(network_context)
  
          num_nets_provisioned = db.num_nets_provisioned(tenant_id)
          self.assertEqual(expected_num_nets, num_nets_provisioned,
                           'There should be %d nets, not %d' %
                           (expected_num_nets, num_nets_provisioned))
  
          #now test the delete networks
          for net_id in nets:
              network_context = self._get_network_context(tenant_id,
                                                          net_id,
                                                          segmentation_id)
              self.drv.delete_network_precommit(network_context)
  
          num_nets_provisioned = db.num_nets_provisioned(tenant_id)
          expected_num_nets = 0
          self.assertEqual(expected_num_nets, num_nets_provisioned,
                           'There should be %d nets, not %d' %
                           (expected_num_nets, num_nets_provisioned))
  
      def test_create_and_delete_ports(self):
          tenant_id = 'ten-1'
          network_id = 'net1-id'
          segmentation_id = 1001
          vms = ['vm1', 'vm2', 'vm3']
  
          network_context = self._get_network_context(tenant_id,
                                                      network_id,
                                                      segmentation_id)
          self.drv.create_network_precommit(network_context)
  
          for vm_id in vms:
              port_context = self._get_port_context(tenant_id,
                                                    network_id,
                                                    vm_id,
                                                    network_context)
              self.drv.create_port_precommit(port_context)
  
          vm_list = db.get_vms(tenant_id)
          provisioned_vms = len(vm_list)
          expected_vms = len(vms)
          self.assertEqual(expected_vms, provisioned_vms,
                           'There should be %d '
                           'hosts, not %d' % (expected_vms, provisioned_vms))
  
          # Now test the delete ports
          for vm_id in vms:
              port_context = self._get_port_context(tenant_id,
                                                    network_id,
                                                    vm_id,
                                                    network_context)
              self.drv.delete_port_precommit(port_context)
  
          vm_list = db.get_vms(tenant_id)
          provisioned_vms = len(vm_list)
          expected_vms = 0
          self.assertEqual(expected_vms, provisioned_vms,
                           'There should be %d '
                           'VMs, not %d' % (expected_vms, provisioned_vms))
  
      def _get_network_context(self, tenant_id, net_id, seg_id):
          network = {'id': net_id,
                     'tenant_id': tenant_id}
          network_segments = [{'segmentation_id': seg_id}]
          return FakeNetworkContext(network, network_segments, network)
  
      def _get_port_context(self, tenant_id, net_id, vm_id, network):
          port = {'device_id': vm_id,
                  'device_owner': 'compute',
                  'binding:host_id': 'ubuntu1',
                  'tenant_id': tenant_id,
                  'id': 101,
                  'network_id': net_id
                  }
          return FakePortContext(port, port, network)
  
  
  class fake_keystone_info_class(object):
      """To generate fake Keystone Authentification token information
  
      Arista Driver expects Keystone auth info. This fake information
      is for testing only
      """
      auth_protocol = 'abc'
      auth_host = 'host'
      auth_port = 5000
      admin_user = 'neutron'
      admin_password = 'fun'
  
  
  class FakeNetworkContext(object):
      """To generate network context for testing purposes only."""
  
      def __init__(self, network, segments=None, original_network=None):
          self._network = network
          self._original_network = original_network
          self._segments = segments
  
      @property
      def current(self):
          return self._network
  
      @property
      def original(self):
          return self._original_network
  
      @property
      def network_segments(self):
          return self._segments
  
  
  class FakePortContext(object):
      """To generate port context for testing purposes only."""
  
      def __init__(self, port, original_port, network):
          self._port = port
          self._original_port = original_port
          self._network_context = network
  
      @property
      def current(self):
          return self._port
  
      @property
      def original(self):
          return self._original_port
  
      @property
      def network(self):
          return self._network_context
  