def test_is_subset(self):
hs1 = HashSet([1, 2, 3, 4, 5])
hs2 = HashSet([2, 3, 4])
assert hs1.is_subset(hs2) == True
hs2.add(6)
assert hs1.is_subset(hs2) == False
def test_is_subset(self):
s1 = HashSet(['J', 'I', 'H'])
s2 = HashSet(['J', 'I'])
s3 = HashSet(['J', 'H'])
s4 = HashSet(['H', 'F'])
assert s1.is_subset(s2) == True
assert s1.is_subset(s3) == True
assert s1.is_subset(s4) == False
