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| 1 # Copyright 2016 The Chromium Authors. All rights reserved. |
| 2 # Use of this source code is govered by a BSD-style |
| 3 # license that can be found in the LICENSE file or at |
| 4 # https://developers.google.com/open-source/licenses/bsd |
| 5 |
| 6 """Tests for the cache classes.""" |
| 7 |
| 8 import unittest |
| 9 |
| 10 from google.appengine.ext import testbed |
| 11 |
| 12 from services import caches |
| 13 from testing import fake |
| 14 |
| 15 |
| 16 class RamCacheTest(unittest.TestCase): |
| 17 |
| 18 def setUp(self): |
| 19 self.cnxn = 'fake connection' |
| 20 self.cache_manager = fake.CacheManager() |
| 21 self.ram_cache = caches.RamCache(self.cache_manager, 'issue', max_size=3) |
| 22 |
| 23 def testCacheItem(self): |
| 24 self.ram_cache.CacheItem(123, 'foo') |
| 25 self.assertEqual('foo', self.ram_cache.cache[123]) |
| 26 |
| 27 def testCacheItem_DropsOldItems(self): |
| 28 self.ram_cache.CacheItem(123, 'foo') |
| 29 self.ram_cache.CacheItem(234, 'foo') |
| 30 self.ram_cache.CacheItem(345, 'foo') |
| 31 self.ram_cache.CacheItem(456, 'foo') |
| 32 # The cache does not get bigger than its limit. |
| 33 self.assertEqual(3, len(self.ram_cache.cache)) |
| 34 # An old value is dropped, not the newly added one. |
| 35 self.assertIn(456, self.ram_cache.cache) |
| 36 |
| 37 def testCacheAll(self): |
| 38 self.ram_cache.CacheAll({123: 'foo'}) |
| 39 self.assertEqual('foo', self.ram_cache.cache[123]) |
| 40 |
| 41 def testCacheAll_DropsOldItems(self): |
| 42 self.ram_cache.CacheAll({1: 'a', 2: 'b', 3: 'c'}) |
| 43 self.ram_cache.CacheAll({4: 'x', 5: 'y'}) |
| 44 # The cache does not get bigger than its limit. |
| 45 self.assertEqual(3, len(self.ram_cache.cache)) |
| 46 # An old value is dropped, not the newly added one. |
| 47 self.assertIn(4, self.ram_cache.cache) |
| 48 self.assertIn(5, self.ram_cache.cache) |
| 49 self.assertEqual('y', self.ram_cache.cache[5]) |
| 50 |
| 51 def testHasItem(self): |
| 52 self.ram_cache.CacheItem(123, 'foo') |
| 53 self.assertTrue(self.ram_cache.HasItem(123)) |
| 54 self.assertFalse(self.ram_cache.HasItem(999)) |
| 55 |
| 56 def testGetAll(self): |
| 57 self.ram_cache.CacheItem(123, 'foo') |
| 58 self.ram_cache.CacheItem(124, 'bar') |
| 59 hits, misses = self.ram_cache.GetAll([123, 124, 999]) |
| 60 self.assertEqual({123: 'foo', 124: 'bar'}, hits) |
| 61 self.assertEqual([999], misses) |
| 62 |
| 63 def testLocalInvalidate(self): |
| 64 self.ram_cache.CacheAll({123: 'a', 124: 'b', 125: 'c'}) |
| 65 self.ram_cache.LocalInvalidate(124) |
| 66 self.assertEqual(2, len(self.ram_cache.cache)) |
| 67 self.assertNotIn(124, self.ram_cache.cache) |
| 68 |
| 69 self.ram_cache.LocalInvalidate(999) |
| 70 self.assertEqual(2, len(self.ram_cache.cache)) |
| 71 |
| 72 def testInvalidateKeys(self): |
| 73 self.ram_cache.CacheAll({123: 'a', 124: 'b', 125: 'c'}) |
| 74 self.ram_cache.InvalidateKeys(self.cnxn, [124]) |
| 75 self.assertEqual(2, len(self.ram_cache.cache)) |
| 76 self.assertNotIn(124, self.ram_cache.cache) |
| 77 self.assertEqual(self.cache_manager.last_call, |
| 78 ('StoreInvalidateRows', self.cnxn, 'issue', [124])) |
| 79 |
| 80 def testLocalInvalidateAll(self): |
| 81 self.ram_cache.CacheAll({123: 'a', 124: 'b', 125: 'c'}) |
| 82 self.ram_cache.LocalInvalidateAll() |
| 83 self.assertEqual(0, len(self.ram_cache.cache)) |
| 84 |
| 85 def testInvalidateAll(self): |
| 86 self.ram_cache.CacheAll({123: 'a', 124: 'b', 125: 'c'}) |
| 87 self.ram_cache.InvalidateAll(self.cnxn) |
| 88 self.assertEqual(0, len(self.ram_cache.cache)) |
| 89 self.assertEqual(self.cache_manager.last_call, |
| 90 ('StoreInvalidateAll', self.cnxn, 'issue')) |
| 91 |
| 92 |
| 93 class TestableTwoLevelCache(caches.AbstractTwoLevelCache): |
| 94 |
| 95 def __init__(self, cache_manager, kind, max_size=None): |
| 96 super(TestableTwoLevelCache, self).__init__( |
| 97 cache_manager, kind, 'testable:', None, max_size=max_size) |
| 98 |
| 99 # pylint: disable=unused-argument |
| 100 def FetchItems(self, cnxn, keys, **kwargs): |
| 101 """On RAM and memcache miss, hit the database.""" |
| 102 return {key: key for key in keys if key < 900} |
| 103 |
| 104 |
| 105 class AbstractTwoLevelCacheTest(unittest.TestCase): |
| 106 |
| 107 def setUp(self): |
| 108 self.testbed = testbed.Testbed() |
| 109 self.testbed.activate() |
| 110 self.testbed.init_memcache_stub() |
| 111 |
| 112 self.cnxn = 'fake connection' |
| 113 self.cache_manager = fake.CacheManager() |
| 114 self.testable_cache = TestableTwoLevelCache( |
| 115 self.cache_manager, 'issue', max_size=3) |
| 116 |
| 117 def testCacheItem(self): |
| 118 self.testable_cache.CacheItem(123, 'foo') |
| 119 self.assertEqual('foo', self.testable_cache.cache.cache[123]) |
| 120 |
| 121 def testHasItem(self): |
| 122 self.testable_cache.CacheItem(123, 'foo') |
| 123 self.assertTrue(self.testable_cache.HasItem(123)) |
| 124 self.assertFalse(self.testable_cache.HasItem(444)) |
| 125 self.assertFalse(self.testable_cache.HasItem(999)) |
| 126 |
| 127 def testGetAll_FetchGetsItFromDB(self): |
| 128 self.testable_cache.CacheItem(123, 'foo') |
| 129 self.testable_cache.CacheItem(124, 'bar') |
| 130 hits, misses = self.testable_cache.GetAll( |
| 131 self.cnxn, [123, 124, 333, 444]) |
| 132 self.assertEqual({123: 'foo', 124: 'bar', 333: 333, 444: 444}, hits) |
| 133 self.assertEqual([], misses) |
| 134 |
| 135 def testGetAll_FetchDoesNotFindIt(self): |
| 136 self.testable_cache.CacheItem(123, 'foo') |
| 137 self.testable_cache.CacheItem(124, 'bar') |
| 138 hits, misses = self.testable_cache.GetAll( |
| 139 self.cnxn, [123, 124, 999]) |
| 140 self.assertEqual({123: 'foo', 124: 'bar'}, hits) |
| 141 self.assertEqual([999], misses) |
| 142 |
| 143 def testInvalidateKeys(self): |
| 144 self.testable_cache.CacheItem(123, 'a') |
| 145 self.testable_cache.CacheItem(124, 'b') |
| 146 self.testable_cache.CacheItem(125, 'c') |
| 147 self.testable_cache.InvalidateKeys(self.cnxn, [124]) |
| 148 self.assertEqual(2, len(self.testable_cache.cache.cache)) |
| 149 self.assertNotIn(124, self.testable_cache.cache.cache) |
| 150 self.assertEqual(self.cache_manager.last_call, |
| 151 ('StoreInvalidateRows', self.cnxn, 'issue', [124])) |
| 152 |
| 153 def testGetAllAlreadyInRam(self): |
| 154 self.testable_cache.CacheItem(123, 'foo') |
| 155 self.testable_cache.CacheItem(124, 'bar') |
| 156 hits, misses = self.testable_cache.GetAllAlreadyInRam( |
| 157 [123, 124, 333, 444, 999]) |
| 158 self.assertEqual({123: 'foo', 124: 'bar'}, hits) |
| 159 self.assertEqual([333, 444, 999], misses) |
| 160 |
| 161 def testInvalidateAllRamEntries(self): |
| 162 self.testable_cache.CacheItem(123, 'foo') |
| 163 self.testable_cache.CacheItem(124, 'bar') |
| 164 self.testable_cache.InvalidateAllRamEntries(self.cnxn) |
| 165 self.assertFalse(self.testable_cache.HasItem(123)) |
| 166 self.assertFalse(self.testable_cache.HasItem(124)) |
| 167 |
| 168 |
| 169 if __name__ == '__main__': |
| 170 unittest.main() |
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