def test_invert(self):
self.assertEqual(self.f12.__invert__(), fracs.Frac(2, 1))
def setUp(self):
self.f12 = fracs.Frac(1, 2)
self.f12prim = fracs.Frac(1, 2)
self.f13 = fracs.Frac(1, 3)
def test_pos(self):
self.assertEqual(fracs.Frac(-1, -2).__pos__(), self.f12)
self.assertEqual(fracs.Frac(-1, 2).__pos__(), self.f12)
self.assertEqual(fracs.Frac(1, -2).__pos__(), self.f12)
def test_neg(self):
self.assertEqual(fracs.Frac(-1, -2).__neg__(), fracs.Frac(-1, 2))
self.assertEqual(fracs.Frac(-1, 2).__neg__(), fracs.Frac(1, 2))
self.assertEqual(fracs.Frac(1, -2).__neg__(), fracs.Frac(1, 2))
self.assertEqual(fracs.Frac(1, 2).__neg__(), fracs.Frac(-1, 2))
def test_div(self):
self.assertEqual(self.f12 / self.f13, fracs.Frac(3, 2))
self.assertEqual(self.f12 / 2, fracs.Frac(1, 4))
self.assertEqual(2 / self.f12, fracs.Frac(4, 1))
def test_mul(self):
self.assertEqual(self.f12 * self.f13, fracs.Frac(1, 6))
self.assertEqual(self.f12 * 2, fracs.Frac(1, 1))
self.assertEqual(2 * self.f12, fracs.Frac(1, 1))
def test_sub(self):
self.assertEqual(1 - self.f12, fracs.Frac(1, 2))
self.assertEqual(self.f12 - 1, fracs.Frac(-1, 2))
def test_add(self):
self.assertEqual(1 + self.f12, fracs.Frac(3, 2))
self.assertEqual(self.f13 + 1, fracs.Frac(4, 3))
def test_str(self):
self.assertEqual(str(fracs.Frac(2, 1)), '2')
self.assertEqual(str(fracs.Frac(1, 2)), '1/2')
with self.assertRaises(ValueError):
fracs.Frac(2, 0)