assert(s2.Length()+1==s2.Capacity());

    s2.Data();
    if(s2.Length()==s2.Capacity()) {
        //lagrar strängen med \0
        const char * p1 = s2.Data();
        s2.Reserve(len); assert(p1==s2.Data()); //no change

        p1= s2.Data();
        s2.Reserve(len+1);
        assert(p1!=s2.Data()); //change

        p1= s2.Data();
        s2.ShrinkToFit();
        assert(p1!=s2.Data()); //change

        p1= s2.Data();
        s2.ShrinkToFit();
        assert(p1==s2.Data()); //no change
    } else {
        //lagrar strängen utan \0
        int cap;
        s2.Data(); cap=s2.Capacity(); s2.ShrinkToFit(); assert(cap!=s2.Capacity()); //change
        cap=s2.Capacity(); s2.Data(); assert(cap!=s2.Capacity()); //change
        s2.ShrinkToFit(); cap=s2.Capacity(); s2.Reserve(len); assert(cap==s2.Capacity()); //change
        s2.Reserve(len+1); assert(cap!=s2.Capacity()); //change
    }