This is code which I seem to use a lot for running a unit test target as a post build event, so I thought I would share.
configuration {"xcode*" }
postbuildcommands {"$TARGET_BUILD_DIR/$TARGET_NAME"}
configuration {"gmake"}
postbuildcommands { "$(TARGET)" }
configuration {"codeblocks" }
postbuildcommands { "$(TARGET_OUTPUT_FILE)"}
configuration { "vs*"}
postbuildcommands { "\"$(TargetPath)\"" }