def test_rational_numbers_are_set_to_None_if_values_are_not_valid(self):
"""Test if the return is none for the denominator or numerator incorrect values"""
f1 = Rational(4, 0)
f2 = Rational(2.1, 5)
f3 = Rational(3, 6.2)
f4 = Rational('a', 2)
f5 = Rational(3, 'b')
assert f1 is None
assert f2 is None
assert f3 is None
assert f4 is None
assert f5 is None
def test_rational_number_imul(self, r1, r2):
"""test __imul__ method for Rational objects"""
r1 = Rational(1, 8)
r1 *= r2
assert r1.__str__() == "1/32"
def test_rational_number_isub(self, r1, r2):
"""test __isub__ method for Rational objects"""
r1 = Rational(1, 8)
r1 -= r2
assert r1.__str__() == "-1/8"
def test_rational_number_iadd(self, r1, r2):
"""test __iadd__ method for Rational objects"""
r1 = Rational(1, 8)
r1 += r2
assert r1.__str__() == "3/8"
def r1(self):
r1 = Rational(1, 8)
return r1
def r3(self):
r3 = Rational(1, 8)
return r3
def r2(self):
r2 = Rational(1, 4)
return r2