class TestRationalNumber(unittest.TestCase):
def setUp(self):
self.a_rational_number = RationalNumber(1, 2)
self.other_rational_number = RationalNumber(2, 3)
def it_creates_a_rational_number(self):
self.a_rational_number | should | be_instance_of(RationalNumber)
self.other_rational_number | should | be_instance_of(RationalNumber)
def it_takes_the_numerator(self):
self.a_rational_number.numerator | should | be(1)
self.other_rational_number.numerator | should | be(2)
def it_takes_the_denominator(self):
self.a_rational_number.denominator | should | be(2)
self.other_rational_number.denominator | should | be(3)
def it_takes_the_representation_of_the_rational_number(self):
repr(self.a_rational_number) | should | equal_to("1/2")
repr(self.other_rational_number) | should | equal_to("2/3")
def it_sum_two_rational_numbers(self):
self.a_rational_number + self.other_rational_number | should | equal_to(RationalNumber(7, 6))
def it_subtract_two_rational_numbers(self):
self.a_rational_number - self.other_rational_number | should | equal_to(RationalNumber(-1, 6))
def it_multiplies_two_rational_numbers(self):
self.a_rational_number * self.other_rational_number | should | equal_to(RationalNumber(1, 3))
def it_divides_two_rational_numbers(self):
self.a_rational_number / self.other_rational_number | should | equal_to(RationalNumber(3, 4))
def it_takes_the_rational_number_with_float_point(self):
self.a_rational_number.decimal() | should | equal_to(0.5)
self.other_rational_number.decimal(3) | should | equal_to(0.667)
def setUp(self):
self.a_rational_number = RationalNumber(1, 2)
self.other_rational_number = RationalNumber(2, 3)
