Class VersionBitsTester

src/test/versionbits_tests.cpp:68–185

#define CHECKERS 6

class VersionBitsTester
{
    // A fake blockchain
    std::vector<CBlockIndex*> vpblock;

    // 6 independent checkers for the same bit.
    // The first one performs all checks, the second only 50%, the third only 25%, etc...
    // This is to test whether lack of cached information leads to the same results.
    TestConditionChecker checker[CHECKERS];
    // Another 6 that assume delayed activation
    TestDelayedActivationConditionChecker checker_delayed[CHECKERS];
    // Another 6 that assume always active activation
    TestAlwaysActiveConditionChecker checker_always[CHECKERS];
    // Another 6 that assume never active activation
    TestNeverActiveConditionChecker checker_never[CHECKERS];

    // Test counter (to identify failures)
    int num{1000};

public:
    VersionBitsTester& Reset() {
        // Have each group of tests be counted by the 1000s part, starting at 1000
        num = num - (num % 1000) + 1000;

        for (unsigned int i = 0; i < vpblock.size(); i++) {
            delete vpblock[i];
        }
        for (unsigned int  i = 0; i < CHECKERS; i++) {
            checker[i] = TestConditionChecker();
            checker_delayed[i] = TestDelayedActivationConditionChecker();
            checker_always[i] = TestAlwaysActiveConditionChecker();
            checker_never[i] = TestNeverActiveConditionChecker();
        }
        vpblock.clear();
        return *this;
    }

    ~VersionBitsTester() {
         Reset();
    }

    VersionBitsTester& Mine(unsigned int height, int32_t nTime, int32_t nVersion) {
        while (vpblock.size() < height) {
            CBlockIndex* pindex = new CBlockIndex();
            pindex->nHeight = vpblock.size();
            pindex->pprev = Tip();
            pindex->nTime = nTime;
            pindex->nVersion = nVersion;
            pindex->BuildSkip();
            vpblock.push_back(pindex);
        }
        return *this;
    }

    VersionBitsTester& TestStateSinceHeight(int height)
    {
        return TestStateSinceHeight(height, height);
    }