def testSignSetter(self) :
f32 = Float()
f64 = Float(length=64)
def setSign(f, value) :
f.raw_sign = value
bin = '01000110000110110100100101100001'
f32.bin = bin
self.assertEqual(f32.bin, bin)
self.assertEqual(f32.raw_sign, '0')
self.assertEqual(f32.raw_exponent, '10001100')
self.assertEqual(f32.raw_mantissa, '00110110100100101100001')
# length 1
f32.raw_sign = '1'
self.assertEqual(f32.raw_sign, '1')
# length 0
self.assertRaises(bitstring.CreationError, setSign, f32, '')
# exponent and sign (should remain unchanged)
self.assertEqual(f32.raw_exponent, '10001100')
self.assertEqual(f32.raw_mantissa, '00110110100100101100001')
# invalid binary
self.assertRaises(bitstring.CreationError, setSign, f32, '3')
# invalid type
self.assertRaises(bitstring.CreationError, setSign, f32, {})
