Tests for errorformat.  vim: set ft=vim ts=8 :

STARTTEST
:so small.vim
:if !has('quickfix') | e! test.ok | wq! test.out | endif
:set efm=%EEEE%m,%WWWW%m,%+CCCC%.%#,%-GGGG%.%#
:cgetexpr ['WWWW', 'EEEE', 'CCCC']
:$put =strtrans(string(map(getqflist(), '[v:val.text, v:val.valid]')))
:cgetexpr ['WWWW', 'GGGG', 'EEEE', 'CCCC']
:$put =strtrans(string(map(getqflist(), '[v:val.text, v:val.valid]')))
:cgetexpr ['WWWW', 'GGGG', 'ZZZZ', 'EEEE', 'CCCC', 'YYYY']
:$put =strtrans(string(map(getqflist(), '[v:val.text, v:val.valid]')))
:/^Results/,$wq! test.out
ENDTEST

Results of test106: