from solution import format_receipt


def test_basic():
    assert format_receipt(9.99, 3) == "Item price: $9.99\nQuantity: 3\nTotal: $29.97"


def test_round_numbers():
    assert format_receipt(100, 1) == "Item price: $100.00\nQuantity: 1\nTotal: $100.00"


def test_decimal_quantity_one():
    assert format_receipt(1.5, 10) == "Item price: $1.50\nQuantity: 10\nTotal: $15.00"