Tests/RunCMake/BuiltinTargets/TestDependsAll-common.cmake - third_party/github.com/Kitware/CMake - Git at Google

 enable_testing()
 add_custom_target(custom ALL COMMAND ${CMAKE_COMMAND} -E touch custom-output.txt)
 add_test(NAME test COMMAND ${CMAKE_COMMAND} -E echo)
	enable_testing()
	add_custom_target(custom ALL COMMAND ${CMAKE_COMMAND} -E touch custom-output.txt)
	add_test(NAME test COMMAND ${CMAKE_COMMAND} -E echo)