class StringCalculatorTests(unittest.TestCase):
def setUp(self):
self.sc = StringCalculator()
def test_add_returns_0_for_empty_string(self):
self.assertEqual(0, self.sc.add(""))
def test_add_one_number_returns_number(self):
self.assertEqual(1, self.sc.add("1"))
def test_add_many_numbers(self):
self.assertEqual(10, self.sc.add("1,2,3,4"))
def test_newline_delimiter(self):
self.assertEqual(3, self.sc.add("1\n2"))
def test_custom_delimiter(self):
self.assertEqual(3, self.sc.add("//;\n1;2"))
def test_negatives_not_allowed(self):
self.assertRaisesRegex(
ValueError,
"negative numbers not allowed",
self.sc.add,
"-4")
def setUp(self): self.sc = StringCalculator()
