def test_remove(self):
ht = HashedSet(['A', 'B'])
ht.remove('A')
assert ht._size() == 1
assert ht.has('A') == False
ht.remove('B')
assert ht._size() == 0
assert ht.has('B') == False
def test_has(self):
ht = HashedSet([3, 5, 7, 2, 1, 'yeehaw'])
assert ht._size() == 6
assert ht.has(5) == True
ht.remove(5)
assert ht.has(5) == False
assert ht._size() == 5
assert ht.has('A') == False
assert ht.has('yeehaw') == True
def test_size(self):
ht = HashedSet()
assert ht._size() == 0
ht.add('A')
assert ht._size() == 1
ht.add('B')
assert ht._size() == 2
ht.remove('A')
assert ht._size() == 1
ht.remove('B')
assert ht._size() == 0