I developed a samsung smart TV app, tested it in samsung emulator, it works fine.
Now how will i test it in a TV, with out uploading it to samsung app store.
The short version is:
Full details are available on Samsung's website in the document "Testing Your Application on a TV". Finding some of those options requires drilling down through a lot of menus.
Note that Samsung released the 4.0 SDK very recently, so you may find that your software doesn't look all that much like what the document describes. You might have to do some guess work to figure out the changes, or just upgrade your development environment to the 4.0 SDK.
An update of the "Testing Your Application on a TV" for different TV versions: