add tests for concating buffers
add tests for concating buffers

This adds tests for RT #122827, RT #122600 and concating buffers to type objects.

cygx/roast,perl6/roast,cygx/roast,dankogai/roast,skids/roast,skids/roast,laben/roast,skids/roast,bitrauser/roast,zostay/roast,dogbert17/roast,zostay/roast,cygx/roast,laben/roast,dogbert17/roast,laben/roast,niner/roast,b2gills/roast,bitrauser/roast,niner/roast,zostay/roast,b2gills/roast,niner/roast,b2gills/roast,dankogai/roast,dankogai/roast