new file mode 100644
--- /dev/null
+++ b/src/testdir/test_ins_complete.vim
@@ -0,0 +1,91 @@
+
+" Test for insert expansion
+func Test_ins_complete()
+  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&
+endfunc