bu-changeparams.py

#!/usr/bin/env python2
# Copyright (c) 2014-2015 The Bitcoin Core developers
# Copyright (c) 2015-2016 The Bitcoin Unlimited developers
# Distributed under the MIT software license, see the accompanying
# file COPYING or http://www.opensource.org/licenses/mit-license.php.

# Exercise the getchaintips API.  We introduce a network split, work
# on chains of different lengths, and join the network together again.
# This gives us two tips, verify that it works.
import time
import random
from test_framework.test_framework import BitcoinTestFramework
from test_framework.util import assert_equal
from test_framework.util import *
import pdb

class BUChangeParamsTest (BitcoinTestFramework):

    def run_test (self):
        BitcoinTestFramework.run_test (self)
        tips = self.nodes[0].getchaintips ()
        assert_equal (len (tips), 1)
        assert_equal (tips[0]['branchlen'], 0)
        assert_equal (tips[0]['height'], 200)
        assert_equal (tips[0]['status'], 'active')

        self.nodes[1].setminingmaxblock(1000)
        self.nodes[1].setexcessiveblock(1000, 2)

        # Mine an excessive block. Node 1 should not accept it
        addr = self.nodes[1].getnewaddress()
        for i in range(0,20):
          self.nodes[0].sendtoaddress(addr, 1.0)
        self.nodes[0].generate(1)
        time.sleep(2) #give blocks a chance to fully propagate
        counts = [ x.getblockcount() for x in self.nodes[0:2] ]
        assert_equal(counts, [201,200])

        # Mine a block on top. Node 1 should still not accept it
        self.nodes[0].generate(1)
        time.sleep(2) #give blocks a chance to fully propagate
        counts = [ x.getblockcount() for x in self.nodes[0:2] ]
        assert_equal(counts, [202,200])

        # Change node 1 to AD=1. The assertion will fail if it doesn't accept the chain now 
        self.nodes[1].setexcessiveblock(1000, 1)        
        counts = [ x.getblockcount() for x in self.nodes ]
        assert_equal(counts, [202,202])

if __name__ == '__main__':
    BUChangeParamsTest ().main ()