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Diffstat (limited to 'src/test/wallet_tests.cpp')
| -rw-r--r-- | src/test/wallet_tests.cpp | 256 |
1 files changed, 256 insertions, 0 deletions
diff --git a/src/test/wallet_tests.cpp b/src/test/wallet_tests.cpp new file mode 100644 index 0000000000..705609464a --- /dev/null +++ b/src/test/wallet_tests.cpp @@ -0,0 +1,256 @@ +#include <boost/test/unit_test.hpp> + +#include "main.h" +#include "wallet.h" + +// how many times to run all the tests to have a chance to catch errors that only show up with particular random shuffles +#define RUN_TESTS 100 + +// enables tests which currently fail, due to code which tries too hard to avoid sub-cent change +// #define STRICT + +using namespace std; + +BOOST_AUTO_TEST_SUITE(wallet_tests) + +static CWallet wallet; +static vector<COutput> vCoins; + +static void add_coin(int64 nValue, int nAge = 6*24, bool fIsFromMe = false, int nInput=0) +{ + static int i; + CTransaction* tx = new CTransaction; + tx->nLockTime = i++; // so all transactions get different hashes + tx->vout.resize(nInput+1); + tx->vout[nInput].nValue = nValue; + CWalletTx* wtx = new CWalletTx(&wallet, *tx); + delete tx; + if (fIsFromMe) + { + // IsFromMe() returns (GetDebit() > 0), and GetDebit() is 0 if vin.empty(), + // so stop vin being empty, and cache a non-zero Debit to fake out IsFromMe() + wtx->vin.resize(1); + wtx->fDebitCached = true; + wtx->nDebitCached = 1; + } + COutput output(wtx, nInput, nAge); + vCoins.push_back(output); +} + +static void empty_wallet(void) +{ + BOOST_FOREACH(COutput output, vCoins) + delete output.tx; + vCoins.clear(); +} + +BOOST_AUTO_TEST_CASE(coin_selection_tests) +{ + static set<pair<const CWalletTx*,unsigned int> > setCoinsRet; + static int64 nValueRet; + + // test multiple times to allow for differences in the shuffle order + for (int i = 0; i < RUN_TESTS; i++) + { + empty_wallet(); + + // with an empty wallet we can't even pay one cent + BOOST_CHECK(!wallet.SelectCoinsMinConf( 1 * CENT, 1, 6, vCoins, setCoinsRet, nValueRet)); + + add_coin(1*CENT, 4); // add a new 1 cent coin + + // with a new 1 cent coin, we still can't find a mature 1 cent + BOOST_CHECK(!wallet.SelectCoinsMinConf( 1 * CENT, 1, 6, vCoins, setCoinsRet, nValueRet)); + + // but we can find a new 1 cent + BOOST_CHECK( wallet.SelectCoinsMinConf( 1 * CENT, 1, 1, vCoins, setCoinsRet, nValueRet)); + BOOST_CHECK_EQUAL(nValueRet, 1 * CENT); + + add_coin(2*CENT); // add a mature 2 cent coin + + // we can't make 3 cents of mature coins + BOOST_CHECK(!wallet.SelectCoinsMinConf( 3 * CENT, 1, 6, vCoins, setCoinsRet, nValueRet)); + + // we can make 3 cents of new coins + BOOST_CHECK( wallet.SelectCoinsMinConf( 3 * CENT, 1, 1, vCoins, setCoinsRet, nValueRet)); + BOOST_CHECK_EQUAL(nValueRet, 3 * CENT); + + add_coin(5*CENT); // add a mature 5 cent coin, + add_coin(10*CENT, 3, true); // a new 10 cent coin sent from one of our own addresses + add_coin(20*CENT); // and a mature 20 cent coin + + // now we have new: 1+10=11 (of which 10 was self-sent), and mature: 2+5+20=27. total = 38 + + // we can't make 38 cents only if we disallow new coins: + BOOST_CHECK(!wallet.SelectCoinsMinConf(38 * CENT, 1, 6, vCoins, setCoinsRet, nValueRet)); + // we can't even make 37 cents if we don't allow new coins even if they're from us + BOOST_CHECK(!wallet.SelectCoinsMinConf(38 * CENT, 6, 6, vCoins, setCoinsRet, nValueRet)); + // but we can make 37 cents if we accept new coins from ourself + BOOST_CHECK( wallet.SelectCoinsMinConf(37 * CENT, 1, 6, vCoins, setCoinsRet, nValueRet)); + BOOST_CHECK_EQUAL(nValueRet, 37 * CENT); + // and we can make 38 cents if we accept all new coins + BOOST_CHECK( wallet.SelectCoinsMinConf(38 * CENT, 1, 1, vCoins, setCoinsRet, nValueRet)); + BOOST_CHECK_EQUAL(nValueRet, 38 * CENT); + + // try making 34 cents from 1,2,5,10,20 - we can't do it exactly + BOOST_CHECK( wallet.SelectCoinsMinConf(34 * CENT, 1, 1, vCoins, setCoinsRet, nValueRet)); + BOOST_CHECK_GT(nValueRet, 34 * CENT); // but should get more than 34 cents + BOOST_CHECK_EQUAL(setCoinsRet.size(), 3); // the best should be 20+10+5. it's incredibly unlikely the 1 or 2 got included (but possible) + + // when we try making 7 cents, the smaller coins (1,2,5) are enough. I'd hope to see just 2+5, but 1 gets included too + BOOST_CHECK( wallet.SelectCoinsMinConf( 7 * CENT, 1, 1, vCoins, setCoinsRet, nValueRet)); +#ifdef STRICT + BOOST_CHECK_EQUAL(nValueRet, 7 * CENT); + BOOST_CHECK_EQUAL(setCoinsRet.size(), 2); +#else + BOOST_CHECK(nValueRet == 7 * CENT || nValueRet == 8 * CENT); + BOOST_CHECK(setCoinsRet.size() == 2 || setCoinsRet.size() == 3); +#endif + + // when we try making 8 cents, the smaller coins (1,2,5) are exactly enough. + BOOST_CHECK( wallet.SelectCoinsMinConf( 8 * CENT, 1, 1, vCoins, setCoinsRet, nValueRet)); + BOOST_CHECK(nValueRet == 8 * CENT); + BOOST_CHECK_EQUAL(setCoinsRet.size(), 3); + + // when we try making 9 cents, no subset of smaller coins is enough, and we get the next bigger coin (10) + BOOST_CHECK( wallet.SelectCoinsMinConf( 9 * CENT, 1, 1, vCoins, setCoinsRet, nValueRet)); + BOOST_CHECK_EQUAL(nValueRet, 10 * CENT); + BOOST_CHECK_EQUAL(setCoinsRet.size(), 1); + + // now clear out the wallet and start again to test chosing between subsets of smaller coins and the next biggest coin + empty_wallet(); + + add_coin( 6*CENT); + add_coin( 7*CENT); + add_coin( 8*CENT); + add_coin(20*CENT); + add_coin(30*CENT); // now we have 6+7+8+20+30 = 71 cents total + + // check that we have 71 and not 72 + BOOST_CHECK( wallet.SelectCoinsMinConf(71 * CENT, 1, 1, vCoins, setCoinsRet, nValueRet)); + BOOST_CHECK(!wallet.SelectCoinsMinConf(72 * CENT, 1, 1, vCoins, setCoinsRet, nValueRet)); + + // now try making 16 cents. the best smaller coins can do is 6+7+8 = 21; not as good at the next biggest coin, 20 + BOOST_CHECK( wallet.SelectCoinsMinConf(16 * CENT, 1, 1, vCoins, setCoinsRet, nValueRet)); + BOOST_CHECK_EQUAL(nValueRet, 20 * CENT); // we should get 20 in one coin + BOOST_CHECK_EQUAL(setCoinsRet.size(), 1); + + add_coin( 5*CENT); // now we have 5+6+7+8+20+30 = 75 cents total + + // now if we try making 16 cents again, the smaller coins can make 5+6+7 = 18 cents, better than the next biggest coin, 20 + BOOST_CHECK( wallet.SelectCoinsMinConf(16 * CENT, 1, 1, vCoins, setCoinsRet, nValueRet)); + BOOST_CHECK_EQUAL(nValueRet, 18 * CENT); // we should get 18 in 3 coins + BOOST_CHECK_EQUAL(setCoinsRet.size(), 3); + + add_coin( 18*CENT); // now we have 5+6+7+8+18+20+30 + + // and now if we try making 16 cents again, the smaller coins can make 5+6+7 = 18 cents, the same as the next biggest coin, 18 + BOOST_CHECK( wallet.SelectCoinsMinConf(16 * CENT, 1, 1, vCoins, setCoinsRet, nValueRet)); + BOOST_CHECK_EQUAL(nValueRet, 18 * CENT); // we should get 18 in 1 coin + BOOST_CHECK_EQUAL(setCoinsRet.size(), 1); // because in the event of a tie, the biggest coin wins + + // now try making 11 cents. we hope for 5+6 but get 5+7 due to fear of sub-cent change + BOOST_CHECK( wallet.SelectCoinsMinConf(11 * CENT, 1, 1, vCoins, setCoinsRet, nValueRet)); +#ifdef STRICT + BOOST_CHECK_EQUAL(nValueRet, 11 * CENT); +#else + BOOST_CHECK(nValueRet == 11 * CENT || nValueRet == 12 * CENT); +#endif + BOOST_CHECK_EQUAL(setCoinsRet.size(), 2); + + // check that the smallest bigger coin is used + add_coin( 1*COIN); + add_coin( 2*COIN); + add_coin( 3*COIN); + add_coin( 4*COIN); // now we have 5+6+7+8+18+20+30+100+200+300+400 = 1094 cents + BOOST_CHECK( wallet.SelectCoinsMinConf(95 * CENT, 1, 1, vCoins, setCoinsRet, nValueRet)); + BOOST_CHECK_EQUAL(nValueRet, 1 * COIN); // we should get 1 bitcoin in 1 coin + BOOST_CHECK_EQUAL(setCoinsRet.size(), 1); + + BOOST_CHECK( wallet.SelectCoinsMinConf(195 * CENT, 1, 1, vCoins, setCoinsRet, nValueRet)); + BOOST_CHECK_EQUAL(nValueRet, 2 * COIN); // we should get 2 bitcoins in 1 coin + BOOST_CHECK_EQUAL(setCoinsRet.size(), 1); + + // empty the wallet and start again, now with fractions of a cent, to test sub-cent change avoidance + empty_wallet(); + add_coin(0.1*CENT); + add_coin(0.2*CENT); + add_coin(0.3*CENT); + add_coin(0.4*CENT); + add_coin(0.5*CENT); + + // try making 1 cent from 0.1 + 0.2 + 0.3 + 0.4 + 0.5 = 1.5 cents + // we'll get sub-cent change whatever happens, so can expect 1.0 exactly + BOOST_CHECK( wallet.SelectCoinsMinConf(1 * CENT, 1, 1, vCoins, setCoinsRet, nValueRet)); + BOOST_CHECK_EQUAL(nValueRet, 1 * CENT); + + // but if we add a bigger coin, making it possible to avoid sub-cent change, things change: + add_coin(1111*CENT); + + // try making 1 cent from 0.1 + 0.2 + 0.3 + 0.4 + 0.5 + 1111 = 1112.5 cents + BOOST_CHECK( wallet.SelectCoinsMinConf(1 * CENT, 1, 1, vCoins, setCoinsRet, nValueRet)); +#ifdef STRICT + BOOST_CHECK_EQUAL(nValueRet, 1 * CENT); // we hope for the exact amount +#else + BOOST_CHECK(nValueRet == 1 * CENT || nValueRet == 1111 * CENT); // but get a single 1111 cent coin +#endif + + // if we add more sub-cent coins: + add_coin(0.6*CENT); + add_coin(0.7*CENT); + + // and try again to make 1.0 cents, the new coins will be used to make 2.0 cents - leaving 1.0 cent change + BOOST_CHECK( wallet.SelectCoinsMinConf(1 * CENT, 1, 1, vCoins, setCoinsRet, nValueRet)); +#ifdef STRICT + BOOST_CHECK_EQUAL(nValueRet, 1 * CENT); // we hope for the exact amount +#else + BOOST_CHECK(nValueRet == 1 * CENT || nValueRet == 2 * CENT); // but get a bunch of sub-cent coins totalling 2 cents + BOOST_CHECK_GE(setCoinsRet.size(), 4); // 0.7 + 0.6 + 0.5 + 0.2 = 2.0 for example +#endif + + // run the 'mtgox' test (see http://blockexplorer.com/tx/29a3efd3ef04f9153d47a990bd7b048a4b2d213daaa5fb8ed670fb85f13bdbcf) + // they tried to consolidate 10 50k coins into one 500k coin, and ended up with 50k in change + empty_wallet(); + for (int i = 0; i < 20; i++) + add_coin(50000 * COIN); + + BOOST_CHECK( wallet.SelectCoinsMinConf(500000 * COIN, 1, 1, vCoins, setCoinsRet, nValueRet)); +#ifdef STRICT + BOOST_CHECK_EQUAL(nValueRet, 500000 * COIN); // we hope for the exact amount + BOOST_CHECK_EQUAL(setCoinsRet.size(), 10); // in ten coins +#else + BOOST_CHECK(nValueRet == 500000 * COIN || nValueRet == 550000 * COIN); // but get 50k too much + BOOST_CHECK(setCoinsRet.size() == 10 || setCoinsRet.size() == 11); // in 11 coins +#endif + + // if there's not enough in the smaller coins to make at least 1 cent change (0.5+0.6+0.7 < 1.0+1.0), + // we need to try finding an exact subset anyway + + // sometimes it will fail, and so we use the next biggest coin: + empty_wallet(); + add_coin(0.5 * CENT); + add_coin(0.6 * CENT); + add_coin(0.7 * CENT); + add_coin(1111 * CENT); + BOOST_CHECK( wallet.SelectCoinsMinConf(1 * CENT, 1, 1, vCoins, setCoinsRet, nValueRet)); + BOOST_CHECK_EQUAL(nValueRet, 1111 * CENT); // we get the bigger coin + BOOST_CHECK_EQUAL(setCoinsRet.size(), 1); + + // but sometimes it's possible, and we use an exact subset (0.4 + 0.6 = 1.0) + empty_wallet(); + add_coin(0.4 * CENT); + add_coin(0.6 * CENT); + add_coin(0.8 * CENT); + add_coin(1111 * CENT); + BOOST_CHECK( wallet.SelectCoinsMinConf(1 * CENT, 1, 1, vCoins, setCoinsRet, nValueRet)); +#ifdef STRICT + BOOST_CHECK_EQUAL(nValueRet, 1 * CENT); // we hope for the exact amount + BOOST_CHECK_EQUAL(setCoinsRet.size(), 2); // in two coins 0.4+0.6 +#else + BOOST_CHECK_EQUAL(nValueRet, 1111 * CENT); // but since value of smaller coins < target+cent, we get the bigger coin again + BOOST_CHECK_EQUAL(setCoinsRet.size(), 1); +#endif + } +} + +BOOST_AUTO_TEST_SUITE_END() |