Method DoTest

src/test/script_tests.cpp:123–145

struct ScriptTest : BasicTestingSetup {
void DoTest(const CScript& scriptPubKey, const CScript& scriptSig, const CScriptWitness& scriptWitness, script_verify_flags flags, const std::string& message, int scriptError, CAmount nValue = 0)
{
    bool expect = (scriptError == SCRIPT_ERR_OK);
    if (flags & SCRIPT_VERIFY_CLEANSTACK) {
        flags |= SCRIPT_VERIFY_P2SH;
        flags |= SCRIPT_VERIFY_WITNESS;
    }
    ScriptError err;
    const CTransaction txCredit{BuildCreditingTransaction(scriptPubKey, nValue)};
    CMutableTransaction tx = BuildSpendingTransaction(scriptSig, scriptWitness, txCredit);
    BOOST_CHECK_MESSAGE(VerifyScript(scriptSig, scriptPubKey, &scriptWitness, flags, MutableTransactionSignatureChecker(&tx, 0, txCredit.vout[0].nValue, MissingDataBehavior::ASSERT_FAIL), &err) == expect, message);
    BOOST_CHECK_MESSAGE(err == scriptError, FormatScriptError(err) + " where " + FormatScriptError((ScriptError_t)scriptError) + " expected: " + message);

    // Verify that removing flags from a passing test or adding flags to a failing test does not change the result.
    for (int i = 0; i < 256; ++i) {
        script_verify_flags extra_flags = script_verify_flags::from_int(m_rng.randbits(MAX_SCRIPT_VERIFY_FLAGS_BITS));
        script_verify_flags combined_flags{expect ? (flags & ~extra_flags) : (flags | extra_flags)};
        // Weed out some invalid flag combinations.
        if (combined_flags & SCRIPT_VERIFY_CLEANSTACK && ~combined_flags & (SCRIPT_VERIFY_P2SH | SCRIPT_VERIFY_WITNESS)) continue;
        if (combined_flags & SCRIPT_VERIFY_WITNESS && ~combined_flags & SCRIPT_VERIFY_P2SH) continue;
        BOOST_CHECK_MESSAGE(VerifyScript(scriptSig, scriptPubKey, &scriptWitness, combined_flags, MutableTransactionSignatureChecker(&tx, 0, txCredit.vout[0].nValue, MissingDataBehavior::ASSERT_FAIL), &err) == expect, message + strprintf(" (with flags %x)", combined_flags.as_int()));
    }
}
}; // struct ScriptTest

void static NegateSignatureS(std::vector<unsigned char>& vchSig) {