neovim/src/nvim/testdir/test_ins_complete.vim

" Test for insert expansion
func Test_ins_complete()
  edit test_ins_complete.vim
  " The files in the current directory interferes with the files
  " used by this test. So use a separate directory for the test.
  call mkdir('Xdir')
  cd Xdir

  set ff=unix
  call writefile(["test11\t36Gepeto\t/Tag/",
	      \ "asd\ttest11file\t36G",
	      \ "Makefile\tto\trun"], 'Xtestfile')
  call writefile(['', 'start of testfile',
	      \ 'ru',
	      \ 'run1',
	      \ 'run2',
	      \ 'STARTTEST',
	      \ 'ENDTEST',
	      \ 'end of testfile'], 'Xtestdata')
  set ff&

  enew!
  edit Xtestdata
  new
  call append(0, ['#include "Xtestfile"', ''])
  call cursor(2, 1)

  set cot=
  set cpt=.,w
  " add-expands (word from next line) from other window
  exe "normal iru\<C-N>\<C-N>\<C-X>\<C-N>\<Esc>\<C-A>"
  call assert_equal('run1 run3', getline('.'))
  " add-expands (current buffer first)
  exe "normal o\<C-P>\<C-X>\<C-N>"
  call assert_equal('run3 run3', getline('.'))
  " Local expansion, ends in an empty line (unless it becomes a global
  " expansion)
  exe "normal o\<C-X>\<C-P>\<C-P>\<C-P>\<C-P>\<C-P>"
  call assert_equal('', getline('.'))
  " starts Local and switches to global add-expansion
  exe "normal o\<C-X>\<C-P>\<C-P>\<C-X>\<C-X>\<C-N>\<C-X>\<C-N>\<C-N>"
  call assert_equal('run1 run2', getline('.'))

  set cpt=.,w,i
  " i-add-expands and switches to local
  exe "normal OM\<C-N>\<C-X>\<C-N>\<C-X>\<C-N>\<C-X>\<C-X>\<C-X>\<C-P>"
  call assert_equal("Makefile\tto\trun3", getline('.'))
  " add-expands lines (it would end in an empty line if it didn't ignored
  " itself)
  exe "normal o\<C-X>\<C-L>\<C-X>\<C-L>\<C-P>\<C-P>"
  call assert_equal("Makefile\tto\trun3", getline('.'))
  call assert_equal("Makefile\tto\trun3", getline(line('.') - 1))

  set cpt=kXtestfile
  " checks k-expansion, and file expansion (use Xtest11 instead of test11,
  " because TEST11.OUT may match first on DOS)
  write Xtest11.one
  write Xtest11.two
  exe "normal o\<C-N>\<Esc>IX\<Esc>A\<C-X>\<C-F>\<C-N>"
  call assert_equal('Xtest11.two', getline('.'))

  " use CTRL-X CTRL-F to complete Xtest11.one, remove it and then use CTRL-X
  " CTRL-F again to verify this doesn't cause trouble.
  exe "normal oXt\<C-X>\<C-F>\<BS>\<BS>\<BS>\<BS>\<BS>\<BS>\<BS>\<BS>\<C-X>\<C-F>"
  call assert_equal('Xtest11.one', getline('.'))
  normal ddk

  set cpt=w
  " checks make_cyclic in other window
  exe "normal oST\<C-N>\<C-P>\<C-P>\<C-P>\<C-P>"
  call assert_equal('STARTTEST', getline('.'))

  set cpt=u nohid
  " checks unloaded buffer expansion
  only
  exe "normal oEN\<C-N>"
  call assert_equal('ENDTEST', getline('.'))
  " checks adding mode abortion
  exe "normal ounl\<C-N>\<C-X>\<C-X>\<C-P>"
  call assert_equal('unless', getline('.'))

  set cpt=t,d def=^\\k* tags=Xtestfile notagbsearch
  " tag expansion, define add-expansion interrupted
  exe "normal o\<C-X>\<C-]>\<C-X>\<C-D>\<C-X>\<C-D>\<C-X>\<C-X>\<C-D>\<C-X>\<C-D>\<C-X>\<C-D>\<C-X>\<C-D>"
  call assert_equal('test11file	36Gepeto	/Tag/ asd', getline('.'))
  " t-expansion
  exe "normal oa\<C-N>\<Esc>"
  call assert_equal('asd', getline('.'))

  %bw!
  call delete('Xtestfile')
  call delete('Xtest11.one')
  call delete('Xtest11.two')
  call delete('Xtestdata')
  set cpt& cot& def& tags& tagbsearch& hidden&
  cd ..
  call delete('Xdir', 'rf')
endfunc