def test_divide1(self):
"""Divide test case one, throw exception if other.n is zero"""
n = Rational(1, 1)
d = Rational(0, 1)
with self.assertRaises(ZeroDivisionError):
"""Divide by zero"""
n.__div__(d)
def test_divide3(self):
"""Real Division Test Case"""
n = Rational(5, 2)
d = Rational(5, 2)
result = n.__div__(d)
self.assertEqual(result.n, 1)
self.assertEqual(result.d, 1)
def test_divide2(self):
"""Identity Division Case"""
n = Rational(2, 1)
d = Rational(1, 1)
result = n.__div__(d)
self.assertEqual(n.n, result.n)
self.assertEqual(n.d, result.d)
class TestRational(TestCase):
def test___init__(self):
# testing 0
self.rat1 = Rational(0,1)
self.assertEqual(self.rat1.n, 0)
self.assertEqual(self.rat1.d, 1)
# testing 1
self.rat1 = Rational(1, 1)
self.assertEqual(self.rat1.n, 1)
self.assertEqual(self.rat1.d, 1)
# testing -1
self.rat1 = Rational(-1, 1)
self.assertEqual(self.rat1.n, -1)
self.assertEqual(self.rat1.d, 1)
# testing 1 million
self.rat1 = Rational(1000000, 1)
self.assertEqual(self.rat1.n, 1000000)
self.assertEqual(self.rat1.d, 1)
# testing 1 millionth
self.rat1 = Rational(1, 10000000)
self.assertEqual(self.rat1.n, 1)
self.assertEqual(self.rat1.d, 10000000)
# testing -1 million
self.rat1 = Rational(-1000000, 1)
self.assertEqual(self.rat1.n, 1)
self.assertEqual(self.rat1.d, 1)
# testing -1 millionth
self.rat1 = Rational(-1, 1000000)
self.assertEqual(self.rat1.n, 1)
self.assertEqual(self.rat1.d, 1)
# testing 0 denom
with self.assertRaises(ZeroDivisionError):
self.rat1 = Rational(1,0)
# test type error
with self.assertRaises(TypeError):
self.rat1 = Rational('bork', 'blork')
def test___add__(self):
# zero
self.rat1 = Rational(0, 1)
# one
self.rat2 = Rational(1, 1)
# neg one
self.rat3 = Rational(-1, 1)
# one million
self.rat4 = Rational(1000000, 1)
# one millionth
self.rat5 = Rational(1, 10000000)
# neg one million
self.rat6 = Rational(-1000000, 1)
# neg one millionth
self.rat7 = Rational(-1, 1000000)
# 0 + 1
self.assertEqual(self.rat1.__add__(self.rat2), Rational(1,1))
# 0 + -1
self.assertEqual(self.rat1.__add__(self.rat3), Rational(-1, 1))
# 0 + 1000000
self.assertEqual(self.rat1.__add__(self.rat4), Rational(1000000, 1))
# 0 + 1/1000000
self.assertEqual(self.rat1.__add__(self.rat5), Rational(1, 1000000))
# 0 + -1000000
self.assertEqual(self.rat1.__add__(self.rat6), Rational(-1000000, 1))
# 0 + - 1/1000000
self.assertEqual(self.rat1.__add__(self.rat7), Rational(-1, 1000000))
# add string
with self.assertRaises(TypeError):
self.rat1.__add__('bork')
def test___sub__(self):
self.rat0 = Rational(0, 1)
self.rat1 = Rational(2, 1)
self.rat2 = Rational(1, 2)
self.rat3 = Rational(1, 3)
self.rat4 = Rational(100000, 1)
self.rat5 = Rational(50000, 1)
self.assertEqual(self.rat1.__sub__(self.rat2), Rational(3, 2))
self.assertEqual(self.rat2.__sub__(self.rat2), Rational(0, 1))
self.assertEqual(self.rat2.__sub__(self.rat3), Rational(1, 6))
self.assertEqual(self.rat1.__sub__(self.rat0), Rational(2, 1))
self.assertEqual(self.rat3.__sub__(self.rat2), Rational(-1, 6))
self.assertEqual(self.rat2.__sub__(self.rat1), Rational(-3, 2))
self.assertEqual(self.rat4.__sub__(self.rat5), Rational(50000, 1))
def test___div__(self):
self.rat1 = Rational(1, 1)
self.rat2 = Rational(2, 1)
self.rat3 = Rational(1, 2)
self.rat4 = Rational(-2, 1)
self.rat5 = Rational(-1, 2)
self.assertEqual(self.rat1.__div__(self.rat2), Rational(1,2))
self.assertEqual(self.rat2.__div__(self.rat3), Rational(4,1))
self.assertEqual(self.rat3.__div__(self.rat2), Rational(1,4))
self.assertEqual(self.rat4.__div__(self.rat2), Rational(-1,1))
self.assertEqual(self.rat5.__div__(self.rat4), Rational(1,4))
def test___str__(self):
self.rat1 = Rational(1, 1)
self.rat2 = Rational(2, 1)
self.rat3 = Rational(1, 2)
self.rat4 = Rational(-2, 1)
self.rat5 = Rational(-1, 2)
self.assertEqual(self.rat1.__str__(), "1")
self.assertEqual(self.rat2.__str__(), "2")
self.assertEqual(self.rat3.__str__(), "1/2")
self.assertEqual(self.rat4.__str__(), "-2")
self.assertEqual(self.rat5.__str__(), "-1/2")
def test___float__(self):
self.ratFloat = Rational()
self.ratFloat1 = Rational(1, 100000)
self.ratFloat2 = Rational(10000, 10)
self.ratFloat3 = Rational(2341, 3980)
self.assertType(self.ratFloat.__float__(), float)
self.assertType(self.ratFloat1.__float__(), float)
self.assertType(self.ratFloat2.__float__(), float)
self.assertType(self.ratFloat3.__float__(), float)