def get_random_hex(length):
"""
Return random hex string of a given length
"""
if length <= 0:
return ''
return hexify(random.randint(pow(2, length*2), pow(2, length*4)))[0:length]
def test_hexify_float(self):
with self.assertRaises(TypeError):
hexify(33.88)
def test_hexify_negative(self):
with self.assertRaisesRegex(
ValueError, 'Invalid number to hexify - must be positive'):
hexify(-700)
def test_hexify_256(self):
self.assertEqual(hexify(256), '0100')
def test_hexify_12(self):
self.assertEqual(hexify(12), '0C')
def test_hexify_zero(self):
self.assertEqual(hexify(0), '00')