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Catkin provides no built-in equivalent. You'll need to code it yourself using CMake commands.

Maybe something like this would work:

if (CATKIN_ENABLE_TESTING)
  find_package(rostest REQUIRED)
  if (DEFINED ENV{DISPLAY})
    add_rostest(tests/simulation.test)
  else()
    add_rostest(tests/robot.test)
  endif()
endif()

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