Function prepareReporters

extras/catch_amalgamated.cpp:1211–1240

        }

        IEventListenerPtr prepareReporters(Config const* config) {
            if (Catch::getRegistryHub().getReporterRegistry().getListeners().empty()
                    && config->getProcessedReporterSpecs().size() == 1) {
                auto const& spec = config->getProcessedReporterSpecs()[0];
                return createReporter(
                    spec.name,
                    ReporterConfig( config,
                                    makeStream( spec.outputFilename ),
                                    spec.colourMode,
                                    spec.customOptions ) );
            }

            auto multi = Detail::make_unique<MultiReporter>(config);

            auto const& listeners = Catch::getRegistryHub().getReporterRegistry().getListeners();
            for (auto const& listener : listeners) {
                multi->addListener(listener->create(config));
            }

            for ( auto const& reporterSpec : config->getProcessedReporterSpecs() ) {
                multi->addReporter( createReporter(
                    reporterSpec.name,
                    ReporterConfig( config,
                                    makeStream( reporterSpec.outputFilename ),
                                    reporterSpec.colourMode,
                                    reporterSpec.customOptions ) ) );
            }

            return multi;
        }

        class TestGroup {
        public: