CONFIG = 1 2 3 4 5

JOINEDCONFIG = $$join( CONFIG, "-GLUE-", "-BEFORE-", "-AFTER-" )

!contains( JOINEDCONFIG, -BEFORE-1-GLUE-2-GLUE-3-GLUE-4-GLUE-5-AFTER- ) {

   message( "FAILED: join [$$JOINEDCONFIG != -BEFORE-1-GLUE-2-GLUE-3-GLUE-4-GLUE-5-AFTER-]" )

}

# To test member we need to use join

NEWCONFIG = $$member( CONFIG, 4 ) $$member( CONFIG, 3 ) $$member( CONFIG, 2 ) 

JOINEDNEWCONFIG = $$join( NEWCONFIG, "-" )

!contains( JOINEDNEWCONFIG, 5-4-3 ) {

  message( "FAILED: member [$$JOINEDNEWCONFIG != 5-4-3]" )

}