Function BOOST_AUTO_TEST_CASE

src/test/policyestimator_tests.cpp:17–181

BOOST_FIXTURE_TEST_SUITE(policyestimator_tests, BasicTestingSetup)

BOOST_AUTO_TEST_CASE(BlockPolicyEstimates)
{
    CBlockPolicyEstimator feeEst;
    CTxMemPool mpool(&feeEst);
    LOCK2(cs_main, mpool.cs);
    TestMemPoolEntryHelper entry;
    CAmount basefee(2000);
    CAmount deltaFee(100);
    std::vector<CAmount> feeV;

    // Populate vectors of increasing fees
    for (int j = 0; j < 10; j++) {
        feeV.push_back(basefee * (j+1));
    }

    // Store the hashes of transactions that have been
    // added to the mempool by their associate fee
    // txHashes[j] is populated with transactions either of
    // fee = basefee * (j+1)
    std::vector<uint256> txHashes[10];

    // Create a transaction template
    CScript garbage;
    for (unsigned int i = 0; i < 128; i++)
        garbage.push_back('X');
    CMutableTransaction tx;
    tx.vin.resize(1);
    tx.vin[0].scriptSig = garbage;
    tx.vout.resize(1);
    tx.vout[0].nValue=0LL;
    CFeeRate baseRate(basefee, GetVirtualTransactionSize(CTransaction(tx)));

    // Create a fake block
    std::vector<CTransactionRef> block;
    int blocknum = 0;

    // Loop through 200 blocks
    // At a decay .9952 and 4 fee transactions per block
    // This makes the tx count about 2.5 per bucket, well above the 0.1 threshold
    while (blocknum < 200) {
        for (int j = 0; j < 10; j++) { // For each fee
            for (int k = 0; k < 4; k++) { // add 4 fee txs
                tx.vin[0].prevout.n = 10000*blocknum+100*j+k; // make transaction unique
                uint256 hash = tx.GetHash();
                mpool.addUnchecked(entry.Fee(feeV[j]).Time(GetTime()).Height(blocknum).FromTx(tx));
                txHashes[j].push_back(hash);
            }
        }
        //Create blocks where higher fee txs are included more often
        for (int h = 0; h <= blocknum%10; h++) {
            // 10/10 blocks add highest fee transactions
            // 9/10 blocks add 2nd highest and so on until ...
            // 1/10 blocks add lowest fee transactions
            while (txHashes[9-h].size()) {
                CTransactionRef ptx = mpool.get(txHashes[9-h].back());
                if (ptx)
                    block.push_back(ptx);
                txHashes[9-h].pop_back();