def test_make_pretty_money_round_down():
"""
Check that rounding works.
"""
input = 4.49
expected = '$4'
actual = make_pretty_money(input)
assert actual == expected
def test_make_pretty_money_commas():
"""
Check that commas get inserted in values over $999.
"""
input = 4000
expected = '$4,000'
actual = make_pretty_money(input)
assert actual == expected
