def test_intersection(self):
s1 = HashSet(['J', 'E', 'R', 'I'])
s2 = HashSet(['H', 'T', 'E', 'R'])
s3 = s1.intersection(s2)
assert s3.contains('E') == True
assert s3.contains('R') == True
assert s3.size() == 2
def test_intersection(self):
hs1 = HashSet([1, 2, 3, 4])
hs2 = HashSet([2, 3, 4, 5])
intersection = hs1.intersection(hs2)
assert intersection.items() == [2, 3, 4]
