From 34e5015cd21e27c1bf635d92531afac93f553096 Mon Sep 17 00:00:00 2001 From: Ross Nicoll Date: Sat, 21 Feb 2015 12:57:44 +0000 Subject: Add unit tests for next difficulty calculations Split GetNextWorkRequired() into two functions to allow the difficulty calculations to be tested without requiring a full blockchain. Add unit tests to cover basic difficulty calculation, plus each of the min/max actual time, and maximum difficulty target conditions. --- src/test/pow_tests.cpp | 66 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 66 insertions(+) create mode 100644 src/test/pow_tests.cpp (limited to 'src/test/pow_tests.cpp') diff --git a/src/test/pow_tests.cpp b/src/test/pow_tests.cpp new file mode 100644 index 0000000000..e42c1b0a8b --- /dev/null +++ b/src/test/pow_tests.cpp @@ -0,0 +1,66 @@ +// Copyright (c) 2015 The Bitcoin Core developers +// Distributed under the MIT/X11 software license, see the accompanying +// file COPYING or http://www.opensource.org/licenses/mit-license.php. + +#include "main.h" +#include "pow.h" +#include "util.h" + +#include + +using namespace std; + +BOOST_AUTO_TEST_SUITE(pow_tests) + +/* Test calculation of next difficulty target with no constraints applying */ +BOOST_AUTO_TEST_CASE(get_next_work) +{ + SelectParams(CBaseChainParams::MAIN); + + int64_t nLastRetargetTime = 1261130161; // Block #30240 + CBlockIndex pindexLast; + pindexLast.nHeight = 32255; + pindexLast.nTime = 1262152739; // Block #32255 + pindexLast.nBits = 0x1d00ffff; + BOOST_CHECK_EQUAL(CalculateNextWorkRequired(&pindexLast, nLastRetargetTime), 0x1d00d86a); +} + +/* Test the constraint on the upper bound for next work */ +BOOST_AUTO_TEST_CASE(get_next_work_pow_limit) +{ + SelectParams(CBaseChainParams::MAIN); + + int64_t nLastRetargetTime = 1231006505; // Block #0 + CBlockIndex pindexLast; + pindexLast.nHeight = 2015; + pindexLast.nTime = 1233061996; // Block #2015 + pindexLast.nBits = 0x1d00ffff; + BOOST_CHECK_EQUAL(CalculateNextWorkRequired(&pindexLast, nLastRetargetTime), 0x1d00ffff); +} + +/* Test the constraint on the lower bound for actual time taken */ +BOOST_AUTO_TEST_CASE(get_next_work_lower_limit_actual) +{ + SelectParams(CBaseChainParams::MAIN); + + int64_t nLastRetargetTime = 1279008237; // Block #66528 + CBlockIndex pindexLast; + pindexLast.nHeight = 68543; + pindexLast.nTime = 1279297671; // Block #68543 + pindexLast.nBits = 0x1c05a3f4; + BOOST_CHECK_EQUAL(CalculateNextWorkRequired(&pindexLast, nLastRetargetTime), 0x1c0168fd); +} + +/* Test the constraint on the upper bound for actual time taken */ +BOOST_AUTO_TEST_CASE(get_next_work_upper_limit_actual) +{ + SelectParams(CBaseChainParams::MAIN); + int64_t nLastRetargetTime = 1263163443; // NOTE: Not an actual block time + CBlockIndex pindexLast; + pindexLast.nHeight = 46367; + pindexLast.nTime = 1269211443; // Block #46367 + pindexLast.nBits = 0x1c387f6f; + BOOST_CHECK_EQUAL(CalculateNextWorkRequired(&pindexLast, nLastRetargetTime), 0x1d00e1fd); +} + +BOOST_AUTO_TEST_SUITE_END() -- cgit v1.2.3