catch_run_context.cpp

//              Copyright Catch2 Authors
// Distributed under the Boost Software License, Version 1.0.
//   (See accompanying file LICENSE.txt or copy at
//        https://www.boost.org/LICENSE_1_0.txt)

// SPDX-License-Identifier: BSL-1.0
#include <catch2/internal/catch_run_context.hpp>

#include <catch2/catch_user_config.hpp>
#include <catch2/interfaces/catch_interfaces_config.hpp>
#include <catch2/interfaces/catch_interfaces_generatortracker.hpp>
#include <catch2/interfaces/catch_interfaces_reporter.hpp>
#include <catch2/internal/catch_compiler_capabilities.hpp>
#include <catch2/internal/catch_context.hpp>
#include <catch2/internal/catch_enforce.hpp>
#include <catch2/internal/catch_fatal_condition_handler.hpp>
#include <catch2/internal/catch_random_number_generator.hpp>
#include <catch2/catch_timer.hpp>
#include <catch2/internal/catch_output_redirect.hpp>
#include <catch2/internal/catch_assertion_handler.hpp>
#include <catch2/internal/catch_test_failure_exception.hpp>
#include <catch2/internal/catch_result_type.hpp>

#include <cassert>
#include <algorithm>

namespace Catch {

    namespace Generators {
        namespace {
            struct GeneratorTracker final : TestCaseTracking::TrackerBase,
                                      IGeneratorTracker {
                GeneratorBasePtr m_generator;

                GeneratorTracker(
                    TestCaseTracking::NameAndLocation&& nameAndLocation,
                    TrackerContext& ctx,
                    ITracker* parent ):
                    TrackerBase( CATCH_MOVE( nameAndLocation ), ctx, parent ) {}

                static GeneratorTracker*
                acquire( TrackerContext& ctx,
                         TestCaseTracking::NameAndLocationRef const&
                             nameAndLocation ) {
                    GeneratorTracker* tracker;

                    ITracker& currentTracker = ctx.currentTracker();
                    // Under specific circumstances, the generator we want
                    // to acquire is also the current tracker. If this is
                    // the case, we have to avoid looking through current
                    // tracker's children, and instead return the current
                    // tracker.
                    // A case where this check is important is e.g.
                    //     for (int i = 0; i < 5; ++i) {
                    //         int n = GENERATE(1, 2);
                    //     }
                    //
                    // without it, the code above creates 5 nested generators.
                    if ( currentTracker.nameAndLocation() == nameAndLocation ) {
                        auto thisTracker = currentTracker.parent()->findChild(
                            nameAndLocation );
                        assert( thisTracker );
                        assert( thisTracker->isGeneratorTracker() );
                        tracker = static_cast<GeneratorTracker*>( thisTracker );
                    } else if ( ITracker* childTracker =
                                    currentTracker.findChild(
                                        nameAndLocation ) ) {
                        assert( childTracker );
                        assert( childTracker->isGeneratorTracker() );
                        tracker =
                            static_cast<GeneratorTracker*>( childTracker );
                    } else {
                        return nullptr;
                    }

                    if ( !tracker->isComplete() ) { tracker->open(); }

                    return tracker;
                }

                // TrackerBase interface
                bool isGeneratorTracker() const override { return true; }
                auto hasGenerator() const -> bool override {
                    return !!m_generator;
                }
                void close() override {
                    TrackerBase::close();
                    // If a generator has a child (it is followed by a section)
                    // and none of its children have started, then we must wait
                    // until later to start consuming its values.
                    // This catches cases where `GENERATE` is placed between two
                    // `SECTION`s.
                    // **The check for m_children.empty cannot be removed**.
                    // doing so would break `GENERATE` _not_ followed by
                    // `SECTION`s.
                    const bool should_wait_for_child = [&]() {
                        // No children -> nobody to wait for
                        if ( m_children.empty() ) { return false; }
                        // If at least one child started executing, don't wait
                        if ( std::find_if(
                                 m_children.begin(),
                                 m_children.end(),
                                 []( TestCaseTracking::ITrackerPtr const&
                                         tracker ) {
                                     return tracker->hasStarted();
                                 } ) != m_children.end() ) {
                            return false;
                        }

                        // No children have started. We need to check if they
                        // _can_ start, and thus we should wait for them, or
                        // they cannot start (due to filters), and we shouldn't
                        // wait for them
                        ITracker* parent = m_parent;
                        // This is safe: there is always at least one section
                        // tracker in a test case tracking tree
                        while ( !parent->isSectionTracker() ) {
                            parent = parent->parent();
                        }
                        assert( parent &&
                                "Missing root (test case) level section" );

                        auto const& parentSection =
                            static_cast<SectionTracker const&>( *parent );
                        auto const& filters = parentSection.getFilters();
                        // No filters -> no restrictions on running sections
                        if ( filters.empty() ) { return true; }

                        for ( auto const& child : m_children ) {
                            if ( child->isSectionTracker() &&
                                 std::find( filters.begin(),
                                            filters.end(),
                                            static_cast<SectionTracker const&>(
                                                *child )
                                                .trimmedName() ) !=
                                     filters.end() ) {
                                return true;
                            }
                        }
                        return false;
                    }();

                    // This check is a bit tricky, because m_generator->next()
                    // has a side-effect, where it consumes generator's current
                    // value, but we do not want to invoke the side-effect if
                    // this generator is still waiting for any child to start.
                    assert( m_generator && "Tracker without generator" );
                    if ( should_wait_for_child ||
                         ( m_runState == CompletedSuccessfully &&
                           m_generator->countedNext() ) ) {
                        m_children.clear();
                        m_runState = Executing;
                    }
                }

                // IGeneratorTracker interface
                auto getGenerator() const -> GeneratorBasePtr const& override {
                    return m_generator;
                }
                void setGenerator( GeneratorBasePtr&& generator ) override {
                    m_generator = CATCH_MOVE( generator );
                }
            };
        } // namespace
    }

    RunContext::RunContext(IConfig const* _config, IEventListenerPtr&& reporter)
    :   m_runInfo(_config->name()),
        m_config(_config),
        m_reporter(CATCH_MOVE(reporter)),
        m_lastAssertionInfo{ StringRef(), SourceLineInfo("",0), StringRef(), ResultDisposition::Normal },
        m_includeSuccessfulResults( m_config->includeSuccessfulResults() || m_reporter->getPreferences().shouldReportAllAssertions )
    {
        getCurrentMutableContext().setResultCapture( this );
        m_reporter->testRunStarting(m_runInfo);
    }

    RunContext::~RunContext() {
        m_reporter->testRunEnded(TestRunStats(m_runInfo, m_totals, aborting()));
    }

    Totals RunContext::runTest(TestCaseHandle const& testCase) {
        const Totals prevTotals = m_totals;

        auto const& testInfo = testCase.getTestCaseInfo();
        m_reporter->testCaseStarting(testInfo);
        m_activeTestCase = &testCase;


        ITracker& rootTracker = m_trackerContext.startRun();
        assert(rootTracker.isSectionTracker());
        static_cast<SectionTracker&>(rootTracker).addInitialFilters(m_config->getSectionsToRun());

        // We intentionally only seed the internal RNG once per test case,
        // before it is first invoked. The reason for that is a complex
        // interplay of generator/section implementation details and the
        // Random*Generator types.
        //
        // The issue boils down to us needing to seed the Random*Generators
        // with different seed each, so that they return different sequences
        // of random numbers. We do this by giving them a number from the
        // shared RNG instance as their seed.
        //
        // However, this runs into an issue if the reseeding happens each
        // time the test case is entered (as opposed to first time only),
        // because multiple generators could get the same seed, e.g. in
        // ```cpp
        // TEST_CASE() {
        //     auto i = GENERATE(take(10, random(0, 100));
        //     SECTION("A") {
        //         auto j = GENERATE(take(10, random(0, 100));
        //     }
        //     SECTION("B") {
        //         auto k = GENERATE(take(10, random(0, 100));
        //     }
        // }
        // ```
        // `i` and `j` would properly return values from different sequences,
        // but `i` and `k` would return the same sequence, because their seed
        // would be the same.
        // (The reason their seeds would be the same is that the generator
        //  for k would be initialized when the test case is entered the second
        //  time, after the shared RNG instance was reset to the same value
        //  it had when the generator for i was initialized.)
        seedRng( *m_config );

        uint64_t testRuns = 0;
        std::string redirectedCout;
        std::string redirectedCerr;
        do {
            m_trackerContext.startCycle();
            m_testCaseTracker = &SectionTracker::acquire(m_trackerContext, TestCaseTracking::NameAndLocationRef(testInfo.name, testInfo.lineInfo));

            m_reporter->testCasePartialStarting(testInfo, testRuns);

            const auto beforeRunTotals = m_totals;
            std::string oneRunCout, oneRunCerr;
            runCurrentTest(oneRunCout, oneRunCerr);
            redirectedCout += oneRunCout;
            redirectedCerr += oneRunCerr;

            const auto singleRunTotals = m_totals.delta(beforeRunTotals);
            auto statsForOneRun = TestCaseStats(testInfo, singleRunTotals, CATCH_MOVE(oneRunCout), CATCH_MOVE(oneRunCerr), aborting());

            m_reporter->testCasePartialEnded(statsForOneRun, testRuns);
            ++testRuns;
        } while (!m_testCaseTracker->isSuccessfullyCompleted() && !aborting());

        Totals deltaTotals = m_totals.delta(prevTotals);
        if (testInfo.expectedToFail() && deltaTotals.testCases.passed > 0) {
            deltaTotals.assertions.failed++;
            deltaTotals.testCases.passed--;
            deltaTotals.testCases.failed++;
        }
        m_totals.testCases += deltaTotals.testCases;
        m_reporter->testCaseEnded(TestCaseStats(testInfo,
                                  deltaTotals,
                                  CATCH_MOVE(redirectedCout),
                                  CATCH_MOVE(redirectedCerr),
                                  aborting()));

        m_activeTestCase = nullptr;
        m_testCaseTracker = nullptr;

        return deltaTotals;
    }


    void RunContext::assertionEnded(AssertionResult&& result) {
        if (result.getResultType() == ResultWas::Ok) {
            m_totals.assertions.passed++;
            m_lastAssertionPassed = true;
        } else if (result.getResultType() == ResultWas::ExplicitSkip) {
            m_totals.assertions.skipped++;
            m_lastAssertionPassed = true;
        } else if (!result.succeeded()) {
            m_lastAssertionPassed = false;
            if (result.isOk()) {
            }
            else if( m_activeTestCase->getTestCaseInfo().okToFail() )
                m_totals.assertions.failedButOk++;
            else
                m_totals.assertions.failed++;
        }
        else {
            m_lastAssertionPassed = true;
        }

        m_reporter->assertionEnded(AssertionStats(result, m_messages, m_totals));

        if ( result.getResultType() != ResultWas::Warning ) {
            m_messageScopes.clear();
        }

        // Reset working state. assertion info will be reset after
        // populateReaction is run if it is needed
        m_lastResult = CATCH_MOVE( result );
    }
    void RunContext::resetAssertionInfo() {
        m_lastAssertionInfo.macroName = StringRef();
        m_lastAssertionInfo.capturedExpression = "{Unknown expression after the reported line}"_sr;
        m_lastAssertionInfo.resultDisposition = ResultDisposition::Normal;
    }

    void RunContext::notifyAssertionStarted( AssertionInfo const& info ) {
        m_reporter->assertionStarting( info );
    }

    bool RunContext::sectionStarted( StringRef sectionName,
                                     SourceLineInfo const& sectionLineInfo,
                                     Counts& assertions ) {
        ITracker& sectionTracker =
            SectionTracker::acquire( m_trackerContext,
                                     TestCaseTracking::NameAndLocationRef(
                                         sectionName, sectionLineInfo ) );

        if (!sectionTracker.isOpen())
            return false;
        m_activeSections.push_back(&sectionTracker);

        SectionInfo sectionInfo( sectionLineInfo, static_cast<std::string>(sectionName) );
        m_lastAssertionInfo.lineInfo = sectionInfo.lineInfo;

        m_reporter->sectionStarting(sectionInfo);

        assertions = m_totals.assertions;

        return true;
    }
    IGeneratorTracker*
    RunContext::acquireGeneratorTracker( StringRef generatorName,
                                         SourceLineInfo const& lineInfo ) {
        using namespace Generators;
        GeneratorTracker* tracker = GeneratorTracker::acquire(
            m_trackerContext,
            TestCaseTracking::NameAndLocationRef(
                 generatorName, lineInfo ) );
        m_lastAssertionInfo.lineInfo = lineInfo;
        return tracker;
    }

    IGeneratorTracker* RunContext::createGeneratorTracker(
        StringRef generatorName,
        SourceLineInfo lineInfo,
        Generators::GeneratorBasePtr&& generator ) {

        auto nameAndLoc = TestCaseTracking::NameAndLocation( static_cast<std::string>( generatorName ), lineInfo );
        auto& currentTracker = m_trackerContext.currentTracker();
        assert(
            currentTracker.nameAndLocation() != nameAndLoc &&
            "Trying to create tracker for a genreator that already has one" );

        auto newTracker = Catch::Detail::make_unique<Generators::GeneratorTracker>(
            CATCH_MOVE(nameAndLoc), m_trackerContext, &currentTracker );
        auto ret = newTracker.get();
        currentTracker.addChild( CATCH_MOVE( newTracker ) );

        ret->setGenerator( CATCH_MOVE( generator ) );
        ret->open();
        return ret;
    }

    bool RunContext::testForMissingAssertions(Counts& assertions) {
        if (assertions.total() != 0)
            return false;
        if (!m_config->warnAboutMissingAssertions())
            return false;
        if (m_trackerContext.currentTracker().hasChildren())
            return false;
        m_totals.assertions.failed++;
        assertions.failed++;
        return true;
    }

    void RunContext::sectionEnded(SectionEndInfo&& endInfo) {
        Counts assertions = m_totals.assertions - endInfo.prevAssertions;
        bool missingAssertions = testForMissingAssertions(assertions);

        if (!m_activeSections.empty()) {
            m_activeSections.back()->close();
            m_activeSections.pop_back();
        }

        m_reporter->sectionEnded(SectionStats(CATCH_MOVE(endInfo.sectionInfo), assertions, endInfo.durationInSeconds, missingAssertions));
        m_messages.clear();
        m_messageScopes.clear();
    }

    void RunContext::sectionEndedEarly(SectionEndInfo&& endInfo) {
        if ( m_unfinishedSections.empty() ) {
            m_activeSections.back()->fail();
        } else {
            m_activeSections.back()->close();
        }
        m_activeSections.pop_back();

        m_unfinishedSections.push_back(CATCH_MOVE(endInfo));
    }

    void RunContext::benchmarkPreparing( StringRef name ) {
        m_reporter->benchmarkPreparing(name);
    }
    void RunContext::benchmarkStarting( BenchmarkInfo const& info ) {
        m_reporter->benchmarkStarting( info );
    }
    void RunContext::benchmarkEnded( BenchmarkStats<> const& stats ) {
        m_reporter->benchmarkEnded( stats );
    }
    void RunContext::benchmarkFailed( StringRef error ) {
        m_reporter->benchmarkFailed( error );
    }

    void RunContext::pushScopedMessage(MessageInfo const & message) {
        m_messages.push_back(message);
    }

    void RunContext::popScopedMessage(MessageInfo const & message) {
        m_messages.erase(std::remove(m_messages.begin(), m_messages.end(), message), m_messages.end());
    }

    void RunContext::emplaceUnscopedMessage( MessageBuilder&& builder ) {
        m_messageScopes.emplace_back( CATCH_MOVE(builder) );
    }

    std::string RunContext::getCurrentTestName() const {
        return m_activeTestCase
            ? m_activeTestCase->getTestCaseInfo().name
            : std::string();
    }

    const AssertionResult * RunContext::getLastResult() const {
        return &(*m_lastResult);
    }

    void RunContext::exceptionEarlyReported() {
        m_shouldReportUnexpected = false;
    }

    void RunContext::handleFatalErrorCondition( StringRef message ) {
        // First notify reporter that bad things happened
        m_reporter->fatalErrorEncountered(message);

        // Don't rebuild the result -- the stringification itself can cause more fatal errors
        // Instead, fake a result data.
        AssertionResultData tempResult( ResultWas::FatalErrorCondition, { false } );
        tempResult.message = static_cast<std::string>(message);
        AssertionResult result(m_lastAssertionInfo, CATCH_MOVE(tempResult));

        assertionEnded(CATCH_MOVE(result) );
        resetAssertionInfo();

        handleUnfinishedSections();

        // Recreate section for test case (as we will lose the one that was in scope)
        auto const& testCaseInfo = m_activeTestCase->getTestCaseInfo();
        SectionInfo testCaseSection(testCaseInfo.lineInfo, testCaseInfo.name);

        Counts assertions;
        assertions.failed = 1;
        SectionStats testCaseSectionStats(CATCH_MOVE(testCaseSection), assertions, 0, false);
        m_reporter->sectionEnded(testCaseSectionStats);

        auto const& testInfo = m_activeTestCase->getTestCaseInfo();

        Totals deltaTotals;
        deltaTotals.testCases.failed = 1;
        deltaTotals.assertions.failed = 1;
        m_reporter->testCaseEnded(TestCaseStats(testInfo,
                                  deltaTotals,
                                  std::string(),
                                  std::string(),
                                  false));
        m_totals.testCases.failed++;
        m_reporter->testRunEnded(TestRunStats(m_runInfo, m_totals, false));
    }

    bool RunContext::lastAssertionPassed() {
         return m_lastAssertionPassed;
    }

    void RunContext::assertionPassed() {
        m_lastAssertionPassed = true;
        ++m_totals.assertions.passed;
        resetAssertionInfo();
        m_messageScopes.clear();
    }

    bool RunContext::aborting() const {
        return m_totals.assertions.failed >= static_cast<std::size_t>(m_config->abortAfter());
    }

    void RunContext::runCurrentTest(std::string & redirectedCout, std::string & redirectedCerr) {
        auto const& testCaseInfo = m_activeTestCase->getTestCaseInfo();
        SectionInfo testCaseSection(testCaseInfo.lineInfo, testCaseInfo.name);
        m_reporter->sectionStarting(testCaseSection);
        Counts prevAssertions = m_totals.assertions;
        double duration = 0;
        m_shouldReportUnexpected = true;
        m_lastAssertionInfo = { "TEST_CASE"_sr, testCaseInfo.lineInfo, StringRef(), ResultDisposition::Normal };

        Timer timer;
        CATCH_TRY {
            if (m_reporter->getPreferences().shouldRedirectStdOut) {
#if !defined(CATCH_CONFIG_EXPERIMENTAL_REDIRECT)
                RedirectedStreams redirectedStreams(redirectedCout, redirectedCerr);

                timer.start();
                invokeActiveTestCase();
#else
                OutputRedirect r(redirectedCout, redirectedCerr);
                timer.start();
                invokeActiveTestCase();
#endif
            } else {
                timer.start();
                invokeActiveTestCase();
            }
            duration = timer.getElapsedSeconds();
        } CATCH_CATCH_ANON (TestFailureException&) {
            // This just means the test was aborted due to failure
        } CATCH_CATCH_ANON (TestSkipException&) {
            // This just means the test was explicitly skipped
        } CATCH_CATCH_ALL {
            // Under CATCH_CONFIG_FAST_COMPILE, unexpected exceptions under REQUIRE assertions
            // are reported without translation at the point of origin.
            if( m_shouldReportUnexpected ) {
                AssertionReaction dummyReaction;
                handleUnexpectedInflightException( m_lastAssertionInfo, translateActiveException(), dummyReaction );
            }
        }
        Counts assertions = m_totals.assertions - prevAssertions;
        bool missingAssertions = testForMissingAssertions(assertions);

        m_testCaseTracker->close();
        handleUnfinishedSections();
        m_messages.clear();
        m_messageScopes.clear();

        SectionStats testCaseSectionStats(CATCH_MOVE(testCaseSection), assertions, duration, missingAssertions);
        m_reporter->sectionEnded(testCaseSectionStats);
    }

    void RunContext::invokeActiveTestCase() {
        // We need to engage a handler for signals/structured exceptions
        // before running the tests themselves, or the binary can crash
        // without failed test being reported.
        FatalConditionHandlerGuard _(&m_fatalConditionhandler);
        // We keep having issue where some compilers warn about an unused
        // variable, even though the type has non-trivial constructor and
        // destructor. This is annoying and ugly, but it makes them stfu.
        (void)_;

        m_activeTestCase->invoke();
    }

    void RunContext::handleUnfinishedSections() {
        // If sections ended prematurely due to an exception we stored their
        // infos here so we can tear them down outside the unwind process.
        for (auto it = m_unfinishedSections.rbegin(),
             itEnd = m_unfinishedSections.rend();
             it != itEnd;
             ++it)
            sectionEnded(CATCH_MOVE(*it));
        m_unfinishedSections.clear();
    }

    void RunContext::handleExpr(
        AssertionInfo const& info,
        ITransientExpression const& expr,
        AssertionReaction& reaction
    ) {
        bool negated = isFalseTest( info.resultDisposition );
        bool result = expr.getResult() != negated;

        if( result ) {
            if (!m_includeSuccessfulResults) {
                assertionPassed();
            }
            else {
                reportExpr(info, ResultWas::Ok, &expr, negated);
            }
        }
        else {
            reportExpr(info, ResultWas::ExpressionFailed, &expr, negated );
            populateReaction( reaction );
        }
        resetAssertionInfo();
    }
    void RunContext::reportExpr(
            AssertionInfo const &info,
            ResultWas::OfType resultType,
            ITransientExpression const *expr,
            bool negated ) {

        m_lastAssertionInfo = info;
        AssertionResultData data( resultType, LazyExpression( negated ) );

        AssertionResult assertionResult{ info, CATCH_MOVE( data ) };
        assertionResult.m_resultData.lazyExpression.m_transientExpression = expr;

        assertionEnded( CATCH_MOVE(assertionResult) );
    }

    void RunContext::handleMessage(
            AssertionInfo const& info,
            ResultWas::OfType resultType,
            StringRef message,
            AssertionReaction& reaction
    ) {
        m_lastAssertionInfo = info;

        AssertionResultData data( resultType, LazyExpression( false ) );
        data.message = static_cast<std::string>(message);
        AssertionResult assertionResult{ m_lastAssertionInfo,
                                         CATCH_MOVE( data ) };

        const auto isOk = assertionResult.isOk();
        assertionEnded( CATCH_MOVE(assertionResult) );
        if ( !isOk ) {
            populateReaction( reaction );
        } else if ( resultType == ResultWas::ExplicitSkip ) {
            // TODO: Need to handle this explicitly, as ExplicitSkip is
            // considered "OK"
            reaction.shouldSkip = true;
        }
        resetAssertionInfo();
    }
    void RunContext::handleUnexpectedExceptionNotThrown(
            AssertionInfo const& info,
            AssertionReaction& reaction
    ) {
        handleNonExpr(info, Catch::ResultWas::DidntThrowException, reaction);
    }

    void RunContext::handleUnexpectedInflightException(
            AssertionInfo const& info,
            std::string&& message,
            AssertionReaction& reaction
    ) {
        m_lastAssertionInfo = info;

        AssertionResultData data( ResultWas::ThrewException, LazyExpression( false ) );
        data.message = CATCH_MOVE(message);
        AssertionResult assertionResult{ info, CATCH_MOVE(data) };
        assertionEnded( CATCH_MOVE(assertionResult) );
        populateReaction( reaction );
        resetAssertionInfo();
    }

    void RunContext::populateReaction( AssertionReaction& reaction ) {
        reaction.shouldDebugBreak = m_config->shouldDebugBreak();
        reaction.shouldThrow = aborting() || (m_lastAssertionInfo.resultDisposition & ResultDisposition::Normal);
    }

    void RunContext::handleIncomplete(
            AssertionInfo const& info
    ) {
        using namespace std::string_literals;
        m_lastAssertionInfo = info;

        AssertionResultData data( ResultWas::ThrewException, LazyExpression( false ) );
        data.message = "Exception translation was disabled by CATCH_CONFIG_FAST_COMPILE"s;
        AssertionResult assertionResult{ info, CATCH_MOVE( data ) };
        assertionEnded( CATCH_MOVE(assertionResult) );
        resetAssertionInfo();
    }
    void RunContext::handleNonExpr(
            AssertionInfo const &info,
            ResultWas::OfType resultType,
            AssertionReaction &reaction
    ) {
        m_lastAssertionInfo = info;

        AssertionResultData data( resultType, LazyExpression( false ) );
        AssertionResult assertionResult{ info, CATCH_MOVE( data ) };

        const auto isOk = assertionResult.isOk();
        assertionEnded( CATCH_MOVE(assertionResult) );
        if ( !isOk ) { populateReaction( reaction ); }
        resetAssertionInfo();
    }


    IResultCapture& getResultCapture() {
        if (auto* capture = getCurrentContext().getResultCapture())
            return *capture;
        else
            CATCH_INTERNAL_ERROR("No result capture instance");
    }

    void seedRng(IConfig const& config) {
        sharedRng().seed(config.rngSeed());
    }

    unsigned int rngSeed() {
        return getCurrentContext().getConfig()->rngSeed();
    }

}