def test_HashTableSepChain(self):
t = HashTableSepchain()
self.assertEqual(t.size(), 0)
self.assertFalse(t.contains('us'))
self.assertRaises(KeyError, t.get, 'us')
t.put('us', 'us')
self.assertEqual(t.get('us'), 'us')
self.assertEqual(t['us'], 'us')
self.assertTrue(t.contains('us'))
self.assertFalse(t.contains('say'))
self.assertEqual(t.size(), 1)
self.assertEqual(t.collisions(), 0)
t.put('say', 'say')
self.assertEqual(t.get('say'), 'say')
self.assertTrue(t.contains('say'))
self.assertEqual(t.size(), 2)
self.assertEqual(t.collisions(), 1)
t.remove('say')
self.assertFalse(t.contains('say'))
self.assertTrue(t.contains('us'))
t.remove('us')
self.assertEqual(t.size(), 0)
# print(hash_string('the', 11)) # 'the' = 5
t.put('us', 'us')
t.put('say', 'say')
# self.assertEqual(t.load_factor(), 0.18181818181818182)
t.put('the', 'the')
t.put(chr(0), chr(0))
# t.put('0', '0')
# print('chr 0', chr(0))
# print('just 0', '0')
# print(type(chr(0)))
# print(type('0'))
# print(hash_string('us', 23)) # 'the' = 5
# print(hash_string('say', 23)) # 'the' = 5
# print(hash_string('the', 23)) # 'the' = 5
# print('from tests', t)
self.assertTrue(t.contains('us'))
self.assertTrue(t.contains('the'))
# self.assertTrue(t.contains('0'))
self.assertTrue(t.contains(chr(0)))
def test_sepchain4(self):
ht = HashTableSepchain()
num_items = int(47 * 1.5) - 1
for i in range(num_items):
ht.put(chr(i), i)
self.assertEqual(ht.size(), num_items)
self.assertTrue(1.0 < ht.load_factor() <= 1.5)
def test_sepchain3(self):
ht = HashTableSepchain()
for i in range(34):
ht.put(chr(i), i)
self.assertEqual(ht.size(), 34)
self.assertTrue(1.0 < ht.load_factor() <= 1.5)
def test_sepchain1(self):
ht = HashTableSepchain()
for i in range(11):
ht.put(str(i), i)
self.assertEqual(ht.size(), 11)
self.assertEqual(ht.load_factor(), 1.0)
self.assertTrue(ht.contains('0'))
self.assertTrue(ht.contains('1'))
print(ht.hash_table)
self.assertTrue(ht.contains('10'))
self.assertFalse(ht.contains('11'))
def test_sepchain2(self):
ht = HashTableSepchain()
for i in range(20):
print(ht.table_size)
ht.put(chr(i), i)
self.assertEqual(ht.size(), 20)
self.assertTrue(ht.load_factor() <= 1.0)
self.assertTrue(ht.contains(chr(0)))
self.assertTrue(ht.contains(chr(1)))
self.assertTrue(ht.contains(chr(19)))
self.assertFalse(ht.contains(chr(20)))
def test_sepchain6(self):
ht = HashTableSepchain()
for i in range(22):
ht.put(chr(i), i)
self.assertEqual(ht.size(), 22)
print(ht.hash_table)
self.assertEqual(ht[chr(0)], 0)
self.assertEqual(ht[chr(1)], 1)
self.assertEqual(ht[chr(19)], 19)
for i in range(22):
ht.remove(chr(i))
self.assertFalse(ht.contains(chr(0)))
self.assertFalse(ht.contains(chr(1)))
self.assertFalse(ht.contains(chr(19)))
def test_sepchain6(self):
ht = HashTableSepchain()
for i in range(22):
ht.put(chr(i), i)
self.assertEqual(ht.size(), 22)
self.assertEqual(ht[chr(0)], 0)
self.assertEqual(ht[chr(1)], 1)
self.assertEqual(ht[chr(19)], 19)
self.assertRaises(KeyError, ht.get, 'a')
for i in range(22):
ht.remove(chr(i))
self.assertFalse(ht.contains(chr(0)))
self.assertFalse(ht.contains(chr(1)))
self.assertFalse(ht.contains(chr(19)))
self.assertRaises(KeyError, ht.remove, 'a')