Method reserve

util/generic/string_ut.cpp:84–133

    }

    void reserve() {
#if 0
        TStringType s;
        UNIT_ASSERT_EXCEPTION(s.reserve(s.max_size() + 1), std::length_error);

        // Non-shared behaviour - never shrink

        s.reserve(256);
    #ifndef TSTRING_IS_STD_STRING
        const auto* data = s.data();

        UNIT_ASSERT(s.capacity() >= 256);

        s.reserve(128);

        UNIT_ASSERT(s.capacity() >= 256 && s.data() == data);
    #endif

        s.resize(64, 'x');
        s.reserve(10);

    #ifdef TSTRING_IS_STD_STRING
        UNIT_ASSERT(s.capacity() >= 64);
    #else
        UNIT_ASSERT(s.capacity() >= 256 && s.data() == data);
    #endif

    #ifndef TSTRING_IS_STD_STRING
        // Shared behaviour - always reallocate, just as much as requisted

        TStringType holder = s;

        UNIT_ASSERT(s.capacity() >= 256);

        s.reserve(128);

        UNIT_ASSERT(s.capacity() >= 128 && s.capacity() < 256 && s.data() != data);
        UNIT_ASSERT(s.IsDetached());

        s.resize(64, 'x');
        data = s.data();
        holder = s;

        s.reserve(10);

        UNIT_ASSERT(s.capacity() >= 64 && s.capacity() < 128 && s.data() != data);
        UNIT_ASSERT(s.IsDetached());
    #endif
#endif
    }

    void short_string() {
        TStringType const ref_short_str1(Data_.str1()), ref_short_str2(Data_.str2());