Class FileStream

tests/catch.h:3433–3440

    };

    class FileStream : public IStream {
        mutable std::ofstream m_ofs;
    public:
        FileStream( std::string const& filename );
        virtual ~FileStream() CATCH_NOEXCEPT;
    public: // IStream
        virtual std::ostream& stream() const CATCH_OVERRIDE;
    };

    class CoutStream : public IStream {
        mutable std::ostream m_os;