def __init__(self, *args, **kwargs): super(TestKeyValueStore, self).__init__(*args, **kwargs) self.cache = KeyValueStore()
class TestKeyValueStore(unittest.TestCase):
def __init__(self, *args, **kwargs):
super(TestKeyValueStore, self).__init__(*args, **kwargs)
self.cache = KeyValueStore()
def setUp(self, *args, **kwargs):
# set up a different cache for testing the value_cache functionality
# shortDescription retrieves the first line of the docstring of the test
# all tests testing the value cache have 'value_cache' in the docstring
test_name = self.shortDescription()
# 3 of the tests test the value_cache, so initializing the cache accordingly
if 'value_cache' in test_name:
key_values = {x: y for x, y in zip(
xrange(1, 4), [{'f'}, {'d', 'e'}, {'a', 'b', 'c'}])}
else:
key_values = {x: n for x, n in zip(
['a', 'b', 'c', 'd', 'e'], xrange(0, 5))}
for key, value in key_values.iteritems():
self.cache._add(key, value)
def tearDown(self, *args, **kwargs):
pass
def test_add(self):
"""test that adding a key to the cache works"""
key, value = 'f', 100
# assert that the key 'f' is not in the cache
self.assertIsNone(self.cache._retrieve(key))
# add key 'f' to cache
self.cache._add(key, value)
# assert key exists in cache
self.assertEqual(self.cache._retrieve(key), value)
def test_remove(self):
"""test that removing a key from the cache works"""
for index, key in enumerate(['a', 'b', 'c', 'd', 'e']):
# remove the key from the cache
self.cache._remove(key)
# assert that the key has been removed
self.assertIsNone(self.cache._retrieve(key))
def test_retrieve(self):
"""test retrieving a value from the cache works"""
for index, key in enumerate(['a', 'b', 'c', 'd', 'e']):
self.assertEqual(self.cache._retrieve(key), index)
def test_add_to_value_cache(self):
"""test adding an entry to the value_cache works"""
self.assertEqual(len(self.cache._retrieve(1)), 1)
# add another entry to the value 1
self.cache._add_to_value_cache(1, 'z')
self.assertEqual(len(self.cache._retrieve(1)), 2)
# add an entry that does not exist as yet
self.assertIsNone(self.cache._retrieve(4))
self.cache._add_to_value_cache(4, 'y')
self.assertEqual(len(self.cache._retrieve(4)), 1)
def test_remove_from_value_cache(self):
"""test that removing a value from the value_cache works"""
self.assertEqual(len(self.cache._retrieve(1)), 1)
self.cache._remove_from_value_cache(1, 'f')
self.assertIsNone(self.cache._retrieve(1))
self.assertEqual(len(self.cache._retrieve(2)), 2)
self.cache._remove_from_value_cache(2, 'd')
self.assertEqual(len(self.cache._retrieve(2)), 1)
def test_numequalto(self):
"""test that the value_cache returns the right count"""
for x in xrange(1, 4):
self.assertEqual(self.cache._get_numequalto(x), x)
self.cache._add_to_value_cache(1, 'z')
self.assertEqual(self.cache._get_numequalto(1), 2)