def setUp(self):
super().setUp()
self.calculator = StringCalculator()
class TestStringCalculator(TestCase):
def setUp(self):
super().setUp()
self.calculator = StringCalculator()
def test_should_return_0_when_empty_string_is_passed(self):
self.assertEqual(0, self.calculator.add(""))
def test_should_return_number_if_only_1_number_is_passed(self):
self.assertEqual(1, self.calculator.add("1"))
self.assertEqual(2, self.calculator.add("2"))
def test_should_return_sum_of_2_numbers(self):
self.assertEqual(3, self.calculator.add("1,2"))
self.assertEqual(5, self.calculator.add("2,3"))
def test_should_return_sum_of_unknown_amount_of_numbers(self):
self.assertEqual(6, self.calculator.add("1,2,3"))
self.assertEqual(45, self.calculator.add("1,2,3,4,5,6,7,8,9"))
def test_should_handle_new_lines_between_numbers(self):
self.assertEqual(6, self.calculator.add("1\n2,3"))
self.assertEqual(10, self.calculator.add("1\n2,3\n4"))
def test_should_handle_new_delimiters_separated_by_a_new_line(self):
self.assertEqual(6, self.calculator.add("//;\n1;2;3"))
self.assertEqual(7, self.calculator.add("//;\n1;2;4"))
def test_should_raise_error_if_negative_number_is_passed(self):
self.assertRaises(ValueError, self.calculator.add, "-1,2")
try:
self.calculator.add("-1,-2,-3")
except ValueError as e:
self.assertEqual(str(e), "negatives not allowed: -1,-2,-3")
def test_should_not_sum_negative_numbers(self):
self.assertEqual(2, self.calculator.add("2,1001"))
self.assertEqual(1002, self.calculator.add("2,1000"))