def setUp(self):
self.hash_table = HashTableLinearProbing(5)
class TestHashTableLinearProbing(unittest.TestCase):
class Item(object):
def __init__(self, item):
self.item = item
self.key = item
def __repr__(self):
return repr(self.item)
def __eq__(self, other):
if isinstance(other, self.__class__):
return self.item == other.item
else:
return False
def setUp(self):
self.hash_table = HashTableLinearProbing(5)
def test_basic_initialization_and_repr(self):
self.assertEqual(repr(self.hash_table), '[False, False, False, False, False]')
def test_hash(self):
self.assertEqual(self.hash_table.hash(17), 2)
self.assertEqual(self.hash_table.hash(27), 2)
self.assertEqual(self.hash_table.hash(12), 2)
self.assertEqual(self.hash_table.hash(14), 4)
self.assertEqual(self.hash_table.hash(1), 1)
self.assertEqual(self.hash_table.hash(13), 3)
self.assertEqual(self.hash_table.hash(20), 0)
def test_insert(self):
self.hash_table.insert(self.Item(3))
self.assertEqual(repr(self.hash_table), '[False, False, False, 3, False]')
self.hash_table.insert(self.Item(11))
self.assertEqual(repr(self.hash_table), '[False, 11, False, 3, False]')
self.hash_table.insert(self.Item(23))
self.assertEqual(repr(self.hash_table), '[False, 11, False, 3, 23]')
self.hash_table.insert(self.Item(33))
self.assertEqual(repr(self.hash_table), '[33, 11, False, 3, 23]')
self.hash_table.insert(self.Item(21))
self.assertEqual(repr(self.hash_table), '[33, 11, 21, 3, 23]')
def test_remove(self):
self.hash_table.insert(self.Item(3))
self.hash_table.insert(self.Item(11))
self.hash_table.insert(self.Item(23))
self.hash_table.insert(self.Item(33))
self.assertEqual(repr(self.hash_table), '[33, 11, False, 3, 23]')
self.hash_table.remove(33)
self.assertEqual(repr(self.hash_table), '[True, 11, False, 3, 23]')
self.hash_table.remove(21)
self.assertEqual(repr(self.hash_table), '[True, 11, False, 3, 23]')
self.hash_table.remove(21)
self.assertEqual(repr(self.hash_table), '[True, 11, False, 3, 23]')
self.hash_table.remove(11)
self.assertEqual(repr(self.hash_table), '[True, True, False, 3, 23]')
self.hash_table.remove(23)
self.assertEqual(repr(self.hash_table), '[True, True, False, 3, True]')
self.hash_table.remove(3)
self.assertEqual(repr(self.hash_table), '[True, True, False, True, True]')
def test_search(self):
self.hash_table.insert(self.Item(3))
self.hash_table.insert(self.Item(5))
self.assertEqual(self.hash_table.search(4), None)
self.assertEqual(self.hash_table.search(5), self.Item(5))
