add tests for require PATH and require $variable
add tests for require PATH and require $variable

but also change a wrong test about require "ModuleName".

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