include ("${RunCMake_SOURCE_DIR}/check_errors.cmake")
unset (errors)

set(listvar a b c d)

list(JOIN listvar ":" reference)
set (output "$<LIST:JOIN,a;b;c;d,:>")
if (NOT output STREQUAL reference)
  list (APPEND errors "returns bad value: ${output}")
endif()

list(JOIN listvar "" reference)
set (output "$<LIST:JOIN,a;b;c;d,>")
if (NOT output STREQUAL reference)
  list (APPEND errors "returns bad value: ${output}")
endif()

set(listvar a)

list(JOIN listvar ":" reference)
set (output "$<LIST:JOIN,a,:>")
if (NOT output STREQUAL reference)
  list (APPEND errors "returns bad value: ${output}")
endif()

unset(listvar)

list(JOIN listvar ":" reference)
set (output "$<LIST:JOIN,,:>")
if (NOT output STREQUAL reference)
  list (APPEND errors "returns bad value: ${output}")
endif()

check_errors("LIST:JOIN..." ${errors})