def test_parse_a_single_number(self):
eq_(1, calculate('1'))
def test_use_parens_to_override_associativity(self):
eq_(32, calculate('( 5 + 3 ) * ( 8 - 4 )'))
def test_a_lot_of_whitespace(self):
eq_(4, calculate(' 8 / 2 '))
def test_operators_are_right_associative(self):
eq_((23 - (10 - 5)), calculate('23 - 10 - 5'))
eq_((24 / (16 / 2)), calculate('24 / 16 / 2'))
eq_((8 + (5 * 3)), calculate('8 + 5 * 3'))
def test_a_single_number_in_parens(self):
eq_(5, calculate('(5)'))
def test_subtract_two_numbers(self):
eq_(8, calculate('13 - 5'))
def test_roll_the_dice(self, mock_randint):
mock_randint.return_value = 4
eq_(8, calculate('2 d 6'))
def test_multiply_two_numbers(self):
eq_(48, calculate('6 * 8'))
def test_divide_two_numbers(self):
eq_(2.5, calculate('5 / 2'))
def test_add_several_numbers(self):
eq_(56, calculate('18 + 2 + 40 + -4'))
def test_add_two_numbers(self):
eq_(35.2, calculate('5.2 + 30'))
def test_parse_a_negative_number(self):
eq_(-1, calculate('-1'))
def test_numbers_can_have_at_most_one_decimal_point(self):
calculate('2.7.2')
def test_parse_a_decimal_number(self):
eq_(3.141, calculate('3.141'))
