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OpenStack Study: test_brocade_vlan.py

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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

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# 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

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# See the License for the specific language governing permissions and

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"""

Test vlans alloc/dealloc.

"""

from neutron.db import api as db

from neutron.openstack.common import context

from neutron.plugins.brocade import vlanbm as vlan_bitmap

from neutron.tests import base

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class TestVlanBitmap(base.BaseTestCase):

"""exercise Vlan bitmap ."""

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    def setUp(self):

        super(TestVlanBitmap, self).setUp()

        db.configure_db()

        self.addCleanup(db.clear_db)

        self.context = context.get_admin_context()

        self.context.session = db.get_session()

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    def test_vlan(self):

        """test vlan allocation/de-alloc."""

        self.vbm_ = vlan_bitmap.VlanBitmap(self.context)

        vlan_id = self.vbm_.get_next_vlan(None)

        # First vlan is always 2

        self.assertEqual(vlan_id, 2)

        # next vlan is always 3

        vlan_id = self.vbm_.get_next_vlan(None)

        self.assertEqual(vlan_id, 3)

        # get a specific vlan i.e. 4

        vlan_id = self.vbm_.get_next_vlan(4)

        self.assertEqual(vlan_id, 4)

        # get a specific vlan i.e. 5

        vlan_id = self.vbm_.get_next_vlan(5)

        self.assertEqual(vlan_id, 5)

        # Skip 6

        # get a specific vlan i.e. 7

        vlan_id = self.vbm_.get_next_vlan(7)

        self.assertEqual(vlan_id, 7)

        # get a specific vlan i.e. 1900

        vlan_id = self.vbm_.get_next_vlan(1900)

        self.assertEqual(vlan_id, 1900)

        # Release 4 and get next again

        self.vbm_.release_vlan(4)

        vlan_id = self.vbm_.get_next_vlan(None)

        self.assertEqual(vlan_id, 4)