'``parse_storage_string`` returns the integer number of bytes
converted from a string specifying a quantity and unit in a valid
format. Valid format is a number followed by a unit identifier,
which is one of K, M, G or T.'

def test_volume_max_size_parse_valid_unit(self):

    ps = parse_storage_string
    self.assertEqual(((1099511627776,) * 4), (ps(u'1073741824K'), ps(u'1048576M'), ps(u'1024G'), ps(u'1T')))
