text: # Copyright (C) 2011 Google Inc. All rights reserved.
  #
  # Redistribution and use in source and binary forms, with or without
  # modification, are permitted provided that the following conditions are
  # met:
  #
  #     * Redistributions of source code must retain the above copyright
  # notice, this list of conditions and the following disclaimer.
  #     * Redistributions in binary form must reproduce the above
  # copyright notice, this list of conditions and the following disclaimer
  # in the documentation and/or other materials provided with the
  # distribution.
  
  # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  # "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  # LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  # A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  # OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  
  
  import webkitpy.thirdparty.unittest2 as unittest
  
  from webkitpy.common import lru_cache
  
  
  class LRUCacheTest(unittest.TestCase):
  
      def setUp(self):
          self.lru = lru_cache.LRUCache(3)
          self.lru['key_1'] = 'item_1'
          self.lru['key_2'] = 'item_2'
          self.lru['key_3'] = 'item_3'
  
          self.lru2 = lru_cache.LRUCache(1)
          self.lru2['key_1'] = 'item_1'
  
      def test_items(self):
          self.assertEqual(set(self.lru.items()), set([('key_1', 'item_1'), ('key_3', 'item_3'), ('key_2', 'item_2')]))
  
      def test_put(self):
          self.lru['key_4'] = 'item_4'
          self.assertEqual(set(self.lru.items()), set([('key_4', 'item_4'), ('key_3', 'item_3'), ('key_2', 'item_2')]))
  
      def test_update(self):
          self.lru['key_1']
          self.lru['key_5'] = 'item_5'
          self.assertEqual(set(self.lru.items()), set([('key_1', 'item_1'), ('key_3', 'item_3'), ('key_5', 'item_5')]))
  
      def test_keys(self):
          self.assertEqual(set(self.lru.keys()), set(['key_1', 'key_2', 'key_3']))
  
      def test_delete(self):
          del self.lru['key_1']
          self.assertFalse('key_1' in self.lru)
  
      def test_contain(self):
          self.assertTrue('key_1' in self.lru)
          self.assertFalse('key_4' in self.lru)
  
      def test_values(self):
          self.assertEqual(set(self.lru.values()), set(['item_1', 'item_2', 'item_3']))
  
      def test_len(self):
          self.assertEqual(len(self.lru), 3)
  
      def test_size_one_pop(self):
          self.lru2['key_2'] = 'item_2'
          self.assertEqual(self.lru2.keys(), ['key_2'])
  
      def test_size_one_delete(self):
          del self.lru2['key_1']
          self.assertFalse('key_1' in self.lru2)
  
      def test_pop_error(self):
          self.assertRaises(KeyError, self.lru2.__getitem__, 'key_2')
          del self.lru2['key_1']
          self.assertRaises(KeyError, self.lru2.__getitem__, 'key_2')
  
      def test_get_middle_item(self):
          self.lru['key_2']
          self.lru['key_4'] = 'item_4'
          self.lru['key_5'] = 'item_5'
          self.assertEqual(set(self.lru.keys()), set(['key_2', 'key_4', 'key_5']))
  
      def test_set_again(self):
          self.lru['key_1'] = 'item_4'
          self.assertEqual(set(self.lru.items()), set([('key_1', 'item_4'), ('key_3', 'item_3'), ('key_2', 'item_2')]))
  