#!/usr/bin/env python3

from rfc1982_serial_number import Serial, find_intermediate
from argparse import ArgumentParser
from random import randint

ap = ArgumentParser()
ap.add_argument("iterations", type = int, default = 100000, nargs = "?")
args = ap.parse_args()

for test in range(args.iterations):
    i1 = Serial(randint(0, Serial.modulus - 1))
    i2 = Serial(randint(0, Serial.modulus - 1))

    assert i1 == i2 or \
        (i1 < i2 and not (i1 > i2)) or \
        (i1 > i2 and not (i1 < i2)) or \
        int(i1) ^ int(i2) == Serial.modulus >> 1
    
    step = [i1, i2]
    for wrap in find_intermediate(i1, i2):
        assert wrap > step[-2]
        step.insert(-1, wrap)

    for i in range(len(step) - 1):
        assert step[i] < step[i + 1]

    print(" => ".join(str(s) for s in step))