def test_zero_start(self):
fraction = normalize(0b000101) >> 3
yk, t = partition(fraction, 4)
self.assertTrue(yk.positive)
self.assertEqual(yk.whole, 1)
self.assertEqual(yk.fraction, normalize(0b0001) >> 3)
self.assertTrue(t.positive)
self.assertEqual(t.whole, 0)
self.assertEqual(t.fraction, normalize(1) >> 1)
def test_one_zero(self):
fraction = normalize(0b101001)
yk, t = partition(fraction, 4)
self.assertTrue(yk.positive)
self.assertEqual(yk.whole, 1)
self.assertEqual(yk.fraction, normalize(0b1011))
self.assertFalse(t.positive)
self.assertEqual(t.whole, 0)
self.assertEqual(t.fraction, -normalize(0b11))
def test_bigger(self):
max_bits = 5
number = 0b101001
with self.assertRaises(OverflowError):
normalize(number, max_bits)
def test_equal(self):
max_bits = 5
number = 0b10100
self.assertEqual(normalize(number, max_bits), 0b10100)