def test_remove(self):
new_set = HashSet(['red', 'brown', 'gray'])
assert new_set.__length__() == 3
new_set.remove('brown')
assert new_set.__length__() == 2
assert new_set.contains('brown') == False
assert new_set.contains('red') == True
assert new_set.contains('gray') == True
new_set.remove('gray')
assert new_set.__length__() == 1
assert new_set.contains('red') == True
assert new_set.contains('gray') == False
def test_add(self):
new_set = HashSet()
assert new_set.__length__() == 0
new_set.add('red')
new_set.add('brown')
new_set.add('gray')
assert new_set.__length__() == 3
assert new_set.contains('red') == True
assert new_set.contains('brown') == True
assert new_set.contains('purple') == False
new_set.add('orange')
new_set.add('purple')
assert new_set.__length__() == 5
assert new_set.contains('purple') == True
def test_init(self):
new_set = HashSet()
assert new_set.size == 0
working_set = HashSet(['Working', 'Set'])
assert working_set.__length__() == 2