class MathTest(unittest.TestCase):
def setUp(self):
self.Math = Math()
# Test increment
def test_increment_returns_correct_result(self):
self.assertEqual(self.Math.increment(3), 4)
def test_increment_returns_error_message_if_args_not_numbers(self):
self.assertRaises(ValueError, self.Math.increment, 'three')
# Test decrement
def test_decrement_returns_correct_result(self):
self.assertEqual(self.Math.decrement(3), 2)
def test_decrement_returns_error_message_if_args_not_numbers(self):
self.assertRaises(ValueError, self.Math.decrement, 'three')
# Test addition
def test_addition_returns_correct_result(self):
result = self.Math.addition(1, 2)
self.assertEqual(3, result)
def test_addition_returns_error_message_if_both_args_not_numbers(self):
self.assertRaises(ValueError, self.Math.addition, 'one', 'two')
def test_addition_returns_error_message_if_x_args_not_numbers(self):
self.assertRaises(ValueError, self.Math.addition, '1', 'two')
def test_addition_returns_error_message_if_y_args_not_numbers(self):
self.assertRaises(ValueError, self.Math.addition, 'one', '2')
# Test subtraction
def test_subtraction_returns_correct_result(self):
result = self.Math.subtraction(5, 2)
self.assertEqual(3, result)
def test_subtraction_returns_error_message_if_both_args_not_numbers(self):
self.assertRaises(ValueError, self.Math.subtraction, 'five', 'two')
def test_subtraction_returns_error_message_if_x_args_not_numbers(self):
self.assertRaises(ValueError, self.Math.subtraction, '5', 'two')
def test_subtraction_returns_error_message_if_y_args_not_numbers(self):
self.assertRaises(ValueError, self.Math.subtraction, 'five', '2')
# Test multiply
def test_multiply_returns_correct_result(self):
result = self.Math.multiply(5, 2)
self.assertEqual(10, result)
def test_multiply_returns_error_message_if_both_args_not_numbers(self):
self.assertRaises(ValueError, self.Math.multiply, 'five', 'two')
def test_multiply_returns_error_message_if_x_args_not_numbers(self):
self.assertRaises(ValueError, self.Math.multiply, '5', 'two')
def test_multiply_returns_error_message_if_y_args_not_numbers(self):
self.assertRaises(ValueError, self.Math.multiply, 'five', '2')
# Test division
def test_division_returns_correct_result(self):
result = self.Math.division(10, 2)
self.assertEqual(5, result)
def test_division_returns_error_message_if_both_args_not_numbers(self):
self.assertRaises(ValueError, self.Math.division, 'five', 'two')
def test_division_returns_error_message_if_x_args_not_numbers(self):
self.assertRaises(ValueError, self.Math.division, '5', 'two')
def test_division_returns_error_message_if_y_args_not_numbers(self):
self.assertRaises(ValueError, self.Math.division, 'five', '2')
# Test calculations
def test_calculater_returns_correct_result(self):
calc_str = "2 * 3 + 1"
result = self.Math.calc(calc_str)
self.assertEqual(7, result)
def test_calculater_returns_correct_result_but_add_symbol_first(self):
calc_str = "1 + 2 * 3"
result = self.Math.calc(calc_str)
self.assertEqual(7, result)
def test_calculater_sub_div_returns_correct_result(self):
calc_str = "9 / 3 + 1"
result = self.Math.calc(calc_str)
self.assertEqual(4, result)
def test_calculater_sub_div_returns_correct_result_but_sub_symbol_first(
self):
calc_str = "1 + 9 / 3"
result = self.Math.calc(calc_str)
self.assertEqual(4, result)
def test_calculater_all_symbols_returns_correct_result(self):
calc_str = "2 - 9 / 3 + 2 + 1 * 7"
result = self.Math.calc(calc_str)
self.assertEqual(8, result)
# Test calculations considering parentheses
def test_calculater_parentheses_returns_correct_result(self):
calc_str = "2 * (3 + 1)"
result = self.Math.calc_p(calc_str)
self.assertEqual(8, result)
def test_calculater_parentheses_valid_returns_true(self):
calc_str = "2 * (3 + 1)"
result = self.Math.isParenthesesValid(calc_str)
self.assertTrue(result)
def test_calculater_parentheses_valid_with_redundant_returns_true(self):
calc_str = "(2) * (3 + 1)"
result = self.Math.isParenthesesValid(calc_str)
self.assertTrue(result)
def test_calculater_parentheses_valid_but_abnormal_parentheses(self):
calc_str = "2) * (3 + 1)"
result = self.Math.isParenthesesValid(calc_str)
self.assertFalse(result)
def test_calculater_parentheses_all_symbols_returns_correct_result(self):
calc_str = "( 2 - 9 ) / 7 + ((2 + 1) * 7)"
result = self.Math.calc_p(calc_str)
self.assertEqual(20, result)
def test_calculater_parentheses_all_symbols_but_abnormal_parentheses(self):
calc_str = "( 2 - 9 ) / 7) + ((2 + 1) * 7)"
result = self.Math.isParenthesesValid(calc_str)
self.assertFalse(result)
def test_division(self):
self.assertEqual(Math.division(4, 2), 2)