text: # Copyright 2014 Hewlett-Packard Development Company, L.P.
  #
  #    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 neutron.agent.l3 import item_allocator as ia
  from neutron.tests import base
  
  
  class TestObject(object):
      def __init__(self, value):
          super(TestObject, self).__init__()
          self._value = value
  
      def __str__(self):
          return str(self._value)
  
  
  class TestItemAllocator(base.BaseTestCase):
  
      def test__init__(self):
          test_pool = set(TestObject(s) for s in range(32768, 40000))
          with mock.patch.object(ia.ItemAllocator, '_write') as write:
              a = ia.ItemAllocator('/file', TestObject, test_pool)
              test_object = a.allocate('test')
  
          self.assertIn('test', a.allocations)
          self.assertIn(test_object, a.allocations.values())
          self.assertNotIn(test_object, a.pool)
          self.assertTrue(write.called)
  
      def test__init__readfile(self):
          test_pool = set(TestObject(s) for s in range(32768, 40000))
          with mock.patch.object(ia.ItemAllocator, '_read') as read:
              read.return_value = ["da873ca2,10\n"]
              a = ia.ItemAllocator('/file', TestObject, test_pool)
  
          self.assertIn('da873ca2', a.remembered)
          self.assertEqual({}, a.allocations)
  
      def test__init__readfile_error(self):
          test_pool = set(TestObject(s) for s in range(32768, 40000))
          with mock.patch.object(ia.ItemAllocator, '_read') as read,\
                  mock.patch.object(ia.ItemAllocator, '_write') as write:
              read.return_value = ["da873ca2,10\n",
                                   "corrupt_entry_no_delimiter\n",
                                   "42c9daf7,11\n"]
              a = ia.ItemAllocator('/file', TestObject, test_pool)
  
          self.assertIn('da873ca2', a.remembered)
          self.assertIn('42c9daf7', a.remembered)
          self.assertNotIn('corrupt_entry_no_delimiter', a.remembered)
          self.assertEqual({}, a.allocations)
          self.assertTrue(write.called)
  
      def test_allocate_and_lookup(self):
          test_pool = set([TestObject(33000), TestObject(33001)])
          a = ia.ItemAllocator('/file', TestObject, test_pool)
          with mock.patch.object(ia.ItemAllocator, '_write') as write:
              test_object = a.allocate('test')
  
          # a lookup should find the same object
          lookup_object = a.lookup('test')
  
          self.assertIn('test', a.allocations)
          self.assertIn(test_object, a.allocations.values())
          self.assertNotIn(test_object, a.pool)
          self.assertTrue(write.called)
          self.assertEqual(test_object, lookup_object)
  
      def test_allocate_repeated_call_with_same_key(self):
          test_pool = set([TestObject(33000), TestObject(33001),
                           TestObject(33002), TestObject(33003),
                           TestObject(33004), TestObject(33005)])
          a = ia.ItemAllocator('/file', TestObject, test_pool)
          with mock.patch.object(ia.ItemAllocator, '_write'):
              test_object = a.allocate('test')
              test_object1 = a.allocate('test')
              test_object2 = a.allocate('test')
              test_object3 = a.allocate('test1')
  
          # same value for same key on repeated calls
          self.assertEqual(test_object, test_object1)
          self.assertEqual(test_object1, test_object2)
          # values for different keys should be diffent
          self.assertNotEqual(test_object, test_object3)
  
      def test_allocate_from_file(self):
          test_pool = set([TestObject(33000), TestObject(33001)])
          with mock.patch.object(ia.ItemAllocator, '_read') as read:
              read.return_value = ["deadbeef,33000\n"]
              a = ia.ItemAllocator('/file', TestObject, test_pool)
  
          with mock.patch.object(ia.ItemAllocator, '_write') as write:
              t_obj = a.allocate('deadbeef')
  
          self.assertEqual('33000', t_obj._value)
          self.assertIn('deadbeef', a.allocations)
          self.assertIn(t_obj, a.allocations.values())
          self.assertNotIn(33000, a.pool)
          self.assertFalse(write.called)
  
      def test_allocate_exhausted_pool(self):
          test_pool = set([TestObject(33000)])
          with mock.patch.object(ia.ItemAllocator, '_read') as read:
              read.return_value = ["deadbeef,33000\n"]
              a = ia.ItemAllocator('/file', TestObject, test_pool)
  
          with mock.patch.object(ia.ItemAllocator, '_write') as write:
              allocation = a.allocate('abcdef12')
  
          self.assertNotIn('deadbeef', a.allocations)
          self.assertNotIn(allocation, a.pool)
          self.assertTrue(write.called)
  
      def test_release(self):
          test_pool = set([TestObject(33000), TestObject(33001)])
          with mock.patch.object(ia.ItemAllocator, '_write') as write:
              a = ia.ItemAllocator('/file', TestObject, test_pool)
              allocation = a.allocate('deadbeef')
              write.reset_mock()
              a.release('deadbeef')
              # Just try to release the item again to see if it
              # throws any error
              a.release('deadbeef')
  
          self.assertNotIn('deadbeef', a.allocations)
          self.assertIn(allocation, a.pool)
          self.assertEqual({}, a.allocations)
          write.assert_called_once_with([])
  