add a test for the iterator_wrapper
add a test for the iterator_wrapper

xdcesc/json,kaidokert/json,theodelrieu/json,erichkeane/json,xzmagic/json,whoshuu/json,Newbrick/json,silverweed/json,emvivre/json,Cloudage/json,bestwpw/json,hunter-packages/json,kaidokert/json,stanmihai4/json,theodelrieu/json,nlohmann/json,whackashoe/json,hunter-packages/json,Newbrick/json,nlohmann/json,stanmihai4/json,daminetreg/json,nlohmann/json,stanmihai4/json,robertmrk/json,kaidokert/json,Newbrick/json,hunter-packages/json,whackashoe/json