Method testGroupEnded

tutorials/external/catch.hpp:5297–5301

            m_deepestSection->stdErr = testCaseStats.stdErr;
        }
        void testGroupEnded(TestGroupStats const& testGroupStats) override {
            auto node = std::make_shared<TestGroupNode>(testGroupStats);
            node->children.swap(m_testCases);
            m_testGroups.push_back(node);
        }
        void testRunEnded(TestRunStats const& testRunStats) override {
            auto node = std::make_shared<TestRunNode>(testRunStats);
            node->children.swap(m_testGroups);