def test_union():
a = [1, 2, 3]
b = [4, 5, 6]
union = sorted(com.union(a, b))
assert((a + b) == union)
def test_union():
a = [1, 2, 3]
b = [4, 5, 6]
union = sorted(com.union(a, b))
assert ((a + b) == union)
