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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.0.13
Ross Nicoll
10 years ago
4 changed files with 74 additions and 1 deletions
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// Copyright (c) 2015 The Bitcoin Core developers
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// Distributed under the MIT/X11 software license, see the accompanying
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// file COPYING or http://www.opensource.org/licenses/mit-license.php.
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#include "main.h" |
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#include "pow.h" |
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#include "util.h" |
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#include <boost/test/unit_test.hpp> |
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using namespace std; |
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BOOST_AUTO_TEST_SUITE(pow_tests) |
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/* Test calculation of next difficulty target with no constraints applying */ |
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BOOST_AUTO_TEST_CASE(get_next_work) |
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{ |
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SelectParams(CBaseChainParams::MAIN); |
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int64_t nLastRetargetTime = 1261130161; // Block #30240
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CBlockIndex pindexLast; |
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pindexLast.nHeight = 32255; |
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pindexLast.nTime = 1262152739; // Block #32255
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pindexLast.nBits = 0x1d00ffff; |
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BOOST_CHECK_EQUAL(CalculateNextWorkRequired(&pindexLast, nLastRetargetTime), 0x1d00d86a); |
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} |
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/* Test the constraint on the upper bound for next work */ |
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BOOST_AUTO_TEST_CASE(get_next_work_pow_limit) |
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{ |
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SelectParams(CBaseChainParams::MAIN); |
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int64_t nLastRetargetTime = 1231006505; // Block #0
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CBlockIndex pindexLast; |
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pindexLast.nHeight = 2015; |
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pindexLast.nTime = 1233061996; // Block #2015
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pindexLast.nBits = 0x1d00ffff; |
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BOOST_CHECK_EQUAL(CalculateNextWorkRequired(&pindexLast, nLastRetargetTime), 0x1d00ffff); |
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} |
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/* Test the constraint on the lower bound for actual time taken */ |
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BOOST_AUTO_TEST_CASE(get_next_work_lower_limit_actual) |
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{ |
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SelectParams(CBaseChainParams::MAIN); |
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int64_t nLastRetargetTime = 1279008237; // Block #66528
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CBlockIndex pindexLast; |
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pindexLast.nHeight = 68543; |
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pindexLast.nTime = 1279297671; // Block #68543
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pindexLast.nBits = 0x1c05a3f4; |
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BOOST_CHECK_EQUAL(CalculateNextWorkRequired(&pindexLast, nLastRetargetTime), 0x1c0168fd); |
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} |
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/* Test the constraint on the upper bound for actual time taken */ |
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BOOST_AUTO_TEST_CASE(get_next_work_upper_limit_actual) |
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{ |
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SelectParams(CBaseChainParams::MAIN); |
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int64_t nLastRetargetTime = 1263163443; // NOTE: Not an actual block time
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CBlockIndex pindexLast; |
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pindexLast.nHeight = 46367; |
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pindexLast.nTime = 1269211443; // Block #46367
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pindexLast.nBits = 0x1c387f6f; |
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BOOST_CHECK_EQUAL(CalculateNextWorkRequired(&pindexLast, nLastRetargetTime), 0x1d00e1fd); |
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} |
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BOOST_AUTO_TEST_SUITE_END() |
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