def test_when_sqrt_of_two_numbers_then_return_square_root(self):
expr = '144 SQRT'
expected_result = 12
self.assertEqual(rpn_calculate(expr), expected_result)
def test_a_more_complex_Expression(self):
expr = "3 20 4 6 + / *"
expected_result = 6
self.assertEqual(rpn_calculate(expr), expected_result)
def test_when_multiplication_of_two_numbers_then_return_product(self):
expr = '7 4 *'
expected_result = 28
self.assertEqual(rpn_calculate(expr), expected_result)
def test_when_division_of_two_numbers_then_return_quotient(self):
expr = '24 4 /'
expected_result = 6
self.assertEqual(rpn_calculate(expr), expected_result)
def test_when_substraction_of_two_numbers_then_return_differance(self):
expr = '7 3 -'
expected_result = 4
self.assertEqual(rpn_calculate(expr), expected_result)
def test_when_two_numbers_Are_passed_then_Return_sum_of_them(self):
expr = '4 8 +'
expected_result = 12
self.assertEqual(rpn_calculate(expr), expected_result)
def test_when_single_digit_is_passed_then_return_same_digit(self):
number = '45'
expected_result = 45
self.assertEqual(rpn_calculate(number), expected_result)