def test_single_digit():
assert kata.Add("1") == 1
def test_empty_string():
assert kata.Add("") == 0
def test_delimiter():
assert kata.Add("//X\n1X2") == 3
assert kata.Add("//%\n1%2%3") == 6
def test_negative():
with pytest.raises(ValueError, match="Negatives not allowed: -1"):
kata.Add("-1,2")
with pytest.raises(ValueError, match="Negatives not allowed: -4,-5"):
kata.Add("2,-4,3,-5")
def test_greater_than_1000():
assert kata.Add("1001,2") == 2
def test_with_newline():
assert kata.Add("1\n2,3") == 6
def test_multiple_numbers():
assert kata.Add("1,2,3,4,5") == 15
def test_two_digits():
assert kata.Add("1,2") == 3