class HashTableTotalTest(unittest.TestCase):
"""
Functional tests for HashTable.total method
"""
def setUp(self):
self.ht = HashTable(buckets=64)
def test_simple_total(self):
self.assertEqual(self.ht.total(), 0)
self.ht.update("foo")
self.assertEqual(self.ht.total(), 3)
def test_set_reset_total(self):
self.ht.update("foo")
self.assertEqual(self.ht.total(), 3)
self.ht['o'] += 2
self.assertEqual(self.ht.total(), 5)
self.ht['f'] = 0
self.assertEqual(self.ht.total(), 4)
def test_increment_total(self):
self.ht.update("foo")
self.ht.increment("f", 5)
self.assertEqual(self.ht.total(), 8)
self.ht.increment("a", 2)
self.assertEqual(self.ht.total(), 10)
self.ht.increment("r", 0)
self.assertEqual(self.ht.total(), 10)
def test_delete_total(self):
self.ht.update("foo")
del self.ht['o']
self.assertEqual(self.ht.total(), 1)
def test_prune_total(self):
self.ht = HashTable(buckets=4)
self.ht.update("223334444")
self.assertEqual(self.ht.total(), 9)
self.ht.update("1")
self.assertEqual(self.ht.total(), 10)
class HashTablePickleTest(unittest.TestCase):
"""
Functional tests for determining size (cardinality) of hashtable and iterations.
"""
def setUp(self):
self.ht = HashTable(buckets=64)
def tearDown(self):
if os.path.isfile(filename):
os.remove(filename)
def check_hashtable(self, reloaded):
self.assertEqual(len(reloaded), len(self.ht))
self.assertEqual(reloaded.buckets(), self.ht.buckets())
self.assertEqual(reloaded.total(), self.ht.total())
self.assertEqual(set(reloaded.items()), set(self.ht.items()))
self.assertEqual(reloaded.quality(), self.ht.quality())
self.assertEqual(reloaded.cardinality(), self.ht.cardinality())
def store_and_load(self):
with open(filename, 'wb') as outfile:
pickle.dump(self.ht, outfile)
with open(filename, 'rb') as outfile:
reloaded = pickle.load(outfile)
return reloaded
def test_pickle_empty(self):
reloaded = self.store_and_load()
self.check_hashtable(reloaded)
def test_pickle_simple(self):
self.ht.update("boss")
self.ht.update("pickling")
reloaded = self.store_and_load()
self.check_hashtable(reloaded)
def test_pickle_deleted(self):
self.ht.update("boss")
self.ht.update("pickling")
del self.ht['g']
del self.ht['s']
reloaded = self.store_and_load()
self.check_hashtable(reloaded)
def test_pickle_pruned(self):
for i in range(120):
self.ht.increment(str(i), 1 + ((i * 27) % 17))
reloaded = self.store_and_load()
self.check_hashtable(reloaded)
def test_pickle_large(self):
self.ht = HashTable(buckets=2 ** 25)
self.ht.update("boss")
self.ht.update("pickling")
self.ht.update("verylargetable")
reloaded = self.store_and_load()
self.check_hashtable(reloaded)
def test_prune_total(self):
ht = HashTable(buckets=8)
ht.update({'a': 3, 'b': 2, 'c': 4, 'd': 1, 'e': 5, 'f': 6})
ht.update("xbbbd")
self.assertEqual(ht.total(), 26)