view src/testdir/test_writefile.vim @ 35308:22c03485f222 v9.1.0456

patch 9.1.0456: Left shift is incorrect with vartabstop and shiftwidth=0 Commit: https://github.com/vim/vim/commit/88d4f255b7b7a19bb4f6489e0ad0956e47d51fed Author: Gary Johnson <garyjohn@spocom.com> Date: Sat Jun 1 20:51:33 2024 +0200 patch 9.1.0456: Left shift is incorrect with vartabstop and shiftwidth=0 Problem: Left shift is incorrect with vartabstop and shiftwidth=0 Solution: make tabstop_at() function aware of shift direction (Gary Johnson) The problem was that with 'vartabstop' set and 'shiftwidth' equal 0, left shifts using << were shifting the line to the wrong column. The tabstop to the right of the first character in the line was being used as the shift amount instead of the tabstop to the left of that first character. The reason was that the tabstop_at() function always returned the value of the tabstop to the right of the given column and was not accounting for the direction of the shift. The solution was to make tabstop_at() aware of the direction of the shift and to choose the tabtop accordingly. A test was added to check this behavior and make sure it doesn't regress. While at it, also fix a few indentation/alignment issues. fixes: #14864 closes: #14887 Signed-off-by: Gary Johnson <garyjohn@spocom.com> Signed-off-by: Christian Brabandt <cb@256bit.org>
author Christian Brabandt <cb@256bit.org>
date Sat, 01 Jun 2024 21:00:03 +0200
parents f79c9a5a1753
children
line wrap: on
line source

" Tests for the writefile() function and some :write commands.

source check.vim
source term_util.vim

func Test_writefile()
  let f = tempname()
  call writefile(["over", "written"], f, "bD")
  call writefile(["hello", "world"], f, "b")
  call writefile(["!", "good"], f, "a")
  call writefile(["morning"], f, "ab")
  call writefile(["", "vimmers"], f, "ab")
  let l = readfile(f)
  call assert_equal("hello", l[0])
  call assert_equal("world!", l[1])
  call assert_equal("good", l[2])
  call assert_equal("morning", l[3])
  call assert_equal("vimmers", l[4])

  call assert_fails('call writefile("text", "Xwffile")', 'E475: Invalid argument: writefile() first argument must be a List or a Blob')
endfunc

func Test_writefile_ignore_regexp_error()
  write Xt[z-a]est.txt
  call delete('Xt[z-a]est.txt')
endfunc

func Test_writefile_fails_gently()
  call assert_fails('call writefile(["test"], "Xwffile", [])', 'E730:')
  call assert_false(filereadable("Xwffile"))
  call delete("Xwffile")

  call assert_fails('call writefile(["test", [], [], [], "tset"], "Xwffile")', 'E730:')
  call assert_false(filereadable("Xwffile"))
  call delete("Xwffile")

  call assert_fails('call writefile([], "Xwffile", [])', 'E730:')
  call assert_false(filereadable("Xwffile"))
  call delete("Xwffile")

  call assert_fails('call writefile([], [])', 'E730:')
endfunc

func Test_writefile_fails_conversion()
  CheckFeature iconv
  if has('sun')
    throw 'Skipped: does not work on SunOS'
  endif
  " Without a backup file the write won't happen if there is a conversion
  " error.
  set nobackup nowritebackup backupdir=. backupskip=
  new
  let contents = ["line one", "line two"]
  call writefile(contents, 'Xwfcfile', 'D')
  edit Xwfcfile
  call setline(1, ["first line", "cannot convert \u010b", "third line"])
  call assert_fails('write ++enc=cp932', 'E513:')
  call assert_equal(contents, readfile('Xwfcfile'))

  " With 'backupcopy' set, if there is a conversion error, the backup file is
  " still created.
  set backupcopy=yes writebackup& backup&
  call delete('Xwfcfile' .. &backupext)
  call assert_fails('write ++enc=cp932', 'E513:')
  call assert_equal(contents, readfile('Xwfcfile'))
  call assert_equal(contents, readfile('Xwfcfile' .. &backupext))
  set backupcopy&
  %bw!

  " Conversion error during write
  new
  call setline(1, ["\U10000000"])
  let output = execute('write! ++enc=utf-16 Xwfcfile')
  call assert_match('CONVERSION ERROR', output)
  let output = execute('write! ++enc=ucs-2 Xwfcfile')
  call assert_match('CONVERSION ERROR', output)
  call delete('Xwfcfilz~')
  call delete('Xwfcfily~')
  %bw!

  call delete('Xwfcfile' .. &backupext)
  bwipe!
  set backup& writebackup& backupdir&vim backupskip&vim
endfunc

func Test_writefile_fails_conversion2()
  CheckFeature iconv
  if has('sun')
    throw 'Skipped: does not work on SunOS'
  endif
  " With a backup file the write happens even if there is a conversion error,
  " but then the backup file must remain
  set nobackup writebackup backupdir=. backupskip=
  let contents = ["line one", "line two"]
  call writefile(contents, 'Xwf2file_conversion_err', 'D')
  edit Xwf2file_conversion_err
  call setline(1, ["first line", "cannot convert \u010b", "third line"])
  set fileencoding=latin1
  let output = execute('write')
  call assert_match('CONVERSION ERROR', output)
  call assert_equal(contents, readfile('Xwf2file_conversion_err~'))

  call delete('Xwf2file_conversion_err~')
  bwipe!
  set backup& writebackup& backupdir&vim backupskip&vim
endfunc

func SetFlag(timer)
  let g:flag = 1
endfunc

func Test_write_quit_split()
  " Prevent exiting by splitting window on file write.
  augroup testgroup
    autocmd BufWritePre * split
  augroup END
  e! Xwqsfile
  call setline(1, 'nothing')
  wq

  if has('timers')
    " timer will not run if "exiting" is still set
    let g:flag = 0
    call timer_start(1, 'SetFlag')
    sleep 50m
    call assert_equal(1, g:flag)
    unlet g:flag
  endif
  au! testgroup
  bwipe Xwqsfile
  call delete('Xwqsfile')
endfunc

func Test_nowrite_quit_split()
  " Prevent exiting by opening a help window.
  e! Xnqsfile
  help
  wincmd w
  exe winnr() . 'q'

  if has('timers')
    " timer will not run if "exiting" is still set
    let g:flag = 0
    call timer_start(1, 'SetFlag')
    sleep 50m
    call assert_equal(1, g:flag)
    unlet g:flag
  endif
  bwipe Xnqsfile
endfunc

func Test_writefile_sync_arg()
  " This doesn't check if fsync() works, only that the argument is accepted.
  call writefile(['one'], 'Xtest', 'sD')
  call writefile(['two'], 'Xtest', 'S')
endfunc

func Test_writefile_sync_dev_stdout()
  CheckUnix
  if filewritable('/dev/stdout')
    " Just check that this doesn't cause an error.
    call writefile(['one'], '/dev/stdout')
  else
    throw 'Skipped: /dev/stdout is not writable'
  endif
endfunc

func Test_writefile_autowrite()
  set autowrite
  new
  next Xa Xb Xc
  call setline(1, 'aaa')
  next
  call assert_equal(['aaa'], readfile('Xa'))
  call setline(1, 'bbb')
  call assert_fails('edit XX')
  call assert_false(filereadable('Xb'))

  set autowriteall
  edit XX
  call assert_equal(['bbb'], readfile('Xb'))

  bwipe!
  call delete('Xa')
  call delete('Xb')
  set noautowrite
endfunc

func Test_writefile_autowrite_nowrite()
  set autowrite
  new
  next Xa Xb Xc
  set buftype=nowrite
  call setline(1, 'aaa')
  let buf = bufnr('%')
  " buffer contents silently lost
  edit XX
  call assert_false(filereadable('Xa'))
  rewind
  call assert_equal('', getline(1))

  bwipe!
  set noautowrite
endfunc

" Test for ':w !<cmd>' to pipe lines from the current buffer to an external
" command.
func Test_write_pipe_to_cmd()
  CheckUnix
  new
  call setline(1, ['L1', 'L2', 'L3', 'L4'])
  2,3w !cat > Xptfile
  call assert_equal(['L2', 'L3'], readfile('Xptfile'))
  close!
  call delete('Xptfile')
endfunc

" Test for :saveas
func Test_saveas()
  call assert_fails('saveas', 'E471:')
  call writefile(['L1'], 'Xsafile')
  new Xsafile
  new
  call setline(1, ['L1'])
  call assert_fails('saveas Xsafile', 'E139:')
  close!
  enew | only
  call delete('Xsafile')

  " :saveas should detect and set the file type.
  syntax on
  saveas! Xsaveas.pl
  call assert_equal('perl', &filetype)
  syntax off
  %bw!
  call delete('Xsaveas.pl')

  " :saveas fails for "nofile" buffer
  set buftype=nofile
  call assert_fails('saveas Xsafile', 'E676: No matching autocommands for buftype=nofile buffer')

  bwipe!
endfunc

func Test_write_errors()
  " Test for writing partial buffer
  call writefile(['L1', 'L2', 'L3'], 'Xwefile')
  new Xwefile
  call assert_fails('1,2write', 'E140:')
  close!

  call assert_fails('w > Xtest', 'E494:')
 
  " Try to overwrite a directory
  if has('unix')
    call mkdir('Xwerdir1')
    call assert_fails('write Xwerdir1', 'E17:')
    call delete('Xwerdir1', 'd')
  endif

  " Test for :wall for a buffer with no name
  enew | only
  call setline(1, ['L1'])
  call assert_fails('wall', 'E141:')
  enew!

  " Test for writing a 'readonly' file
  new Xwefile
  set readonly
  call assert_fails('write', 'E45:')
  close

  " Test for writing to a read-only file
  new Xwefile
  call setfperm('Xwefile', 'r--r--r--')
  call assert_fails('write', 'E505:')
  call setfperm('Xwefile', 'rw-rw-rw-')
  close

  call delete('Xwefile')

  call writefile(test_null_list(), 'Xwefile')
  call assert_false(filereadable('Xwefile'))
  call writefile(test_null_blob(), 'Xwefile')
  call assert_false(filereadable('Xwefile'))
  call assert_fails('call writefile([], "")', 'E482:')

  " very long file name
  let long_fname = repeat('n', 5000)
  call assert_fails('exe "w " .. long_fname', 'E75:')
  call assert_fails('call writefile([], long_fname)', 'E482:')

  " Test for writing to a block device on Unix-like systems
  if has('unix') && getfperm('/dev/loop0') != ''
        \ && getftype('/dev/loop0') == 'bdev' && !IsRoot()
    new
    edit /dev/loop0
    call assert_fails('write', 'E503: ')
    call assert_fails('write!', 'E503: ')
    close!
  endif
endfunc

" Test for writing to a file which is modified after Vim read it
func Test_write_file_mtime()
  CheckEnglish
  CheckRunVimInTerminal

  " First read the file into a buffer
  call writefile(["Line1", "Line2"], 'Xwfmfile', 'D')
  let old_ftime = getftime('Xwfmfile')
  let buf = RunVimInTerminal('Xwfmfile', #{rows : 10})
  call TermWait(buf)
  call term_sendkeys(buf, ":set noswapfile\<CR>")
  call TermWait(buf)

  " Modify the file directly.  Make sure the file modification time is
  " different. Note that on Linux/Unix, the file is considered modified
  " outside, only if the difference is 2 seconds or more
  sleep 1
  call writefile(["Line3", "Line4"], 'Xwfmfile')
  let new_ftime = getftime('Xwfmfile')
  while new_ftime - old_ftime < 2
    sleep 100m
    call writefile(["Line3", "Line4"], 'Xwfmfile')
    let new_ftime = getftime('Xwfmfile')
  endwhile

  " Try to overwrite the file and check for the prompt
  call term_sendkeys(buf, ":w\<CR>")
  call TermWait(buf)
  call WaitForAssert({-> assert_equal("WARNING: The file has been changed since reading it!!!", term_getline(buf, 9))})
  call assert_equal("Do you really want to write to it (y/n)?",
        \ term_getline(buf, 10))
  call term_sendkeys(buf, "n\<CR>")
  call TermWait(buf)
  call assert_equal(new_ftime, getftime('Xwfmfile'))
  call term_sendkeys(buf, ":w\<CR>")
  call TermWait(buf)
  call term_sendkeys(buf, "y\<CR>")
  call TermWait(buf)
  call WaitForAssert({-> assert_equal('Line2', readfile('Xwfmfile')[1])})

  " clean up
  call StopVimInTerminal(buf)
endfunc

" Test for an autocmd unloading a buffer during a write command
func Test_write_autocmd_unloadbuf_lockmark()
  augroup WriteTest
    autocmd BufWritePre Xwaufile enew | write
  augroup END
  e Xwaufile
  call assert_fails('lockmarks write', ['E32:', 'E203:'])
  augroup WriteTest
    au!
  augroup END
  augroup! WriteTest
endfunc

" Test for writing a buffer with 'acwrite' but without autocmds
func Test_write_acwrite_error()
  new Xwaefile
  call setline(1, ['line1', 'line2', 'line3'])
  set buftype=acwrite
  call assert_fails('write', 'E676:')
  call assert_fails('1,2write!', 'E676:')
  call assert_fails('w >>', 'E676:')
  close!
endfunc

" Test for adding and removing lines from an autocmd when writing a buffer
func Test_write_autocmd_add_remove_lines()
  new Xwaafile
  call setline(1, ['aaa', 'bbb', 'ccc', 'ddd'])

  " Autocmd deleting lines from the file when writing a partial file
  augroup WriteTest2
    au!
    autocmd FileWritePre Xwaafile 1,2d
  augroup END
  call assert_fails('2,3w!', 'E204:')

  " Autocmd adding lines to a file when writing a partial file
  augroup WriteTest2
    au!
    autocmd FileWritePre Xwaafile call append(0, ['xxx', 'yyy'])
  augroup END
  %d
  call setline(1, ['aaa', 'bbb', 'ccc', 'ddd'])
  1,2w!
  call assert_equal(['xxx', 'yyy', 'aaa', 'bbb'], readfile('Xwaafile'))

  " Autocmd deleting lines from the file when writing the whole file
  augroup WriteTest2
    au!
    autocmd BufWritePre Xwaafile 1,2d
  augroup END
  %d
  call setline(1, ['aaa', 'bbb', 'ccc', 'ddd'])
  w
  call assert_equal(['ccc', 'ddd'], readfile('Xwaafile'))

  augroup WriteTest2
    au!
  augroup END
  augroup! WriteTest2

  close!
  call delete('Xwaafile')
endfunc

" Test for writing to a readonly file
func Test_write_readonly()
  call writefile([], 'Xwrofile', 'D')
  call setfperm('Xwrofile', "r--------")
  edit Xwrofile
  set noreadonly backupskip=
  call assert_fails('write', 'E505:')
  let save_cpo = &cpo
  set cpo+=W
  call assert_fails('write!', 'E504:')
  let &cpo = save_cpo
  call setline(1, ['line1'])
  write!
  call assert_equal(['line1'], readfile('Xwrofile'))

  " Auto-saving a readonly file should fail with 'autowriteall'
  %bw!
  e Xwrofile
  set noreadonly autowriteall
  call setline(1, ['aaaa'])
  call assert_fails('n', 'E505:')
  set cpo+=W
  call assert_fails('n', 'E504:')
  set cpo-=W
  set autowriteall&

  set backupskip&
  %bw!
endfunc

" Test for 'patchmode'
func Test_patchmode()
  call writefile(['one'], 'Xpafile', 'D')
  set patchmode=.orig nobackup backupskip= writebackup
  new Xpafile
  call setline(1, 'two')
  " first write should create the .orig file
  write
  call assert_equal(['one'], readfile('Xpafile.orig'))
  call setline(1, 'three')
  " subsequent writes should not create/modify the .orig file
  write
  call assert_equal(['one'], readfile('Xpafile.orig'))

  " use 'patchmode' with 'nobackup' and 'nowritebackup' to create an empty
  " original file
  call delete('Xpafile')
  call delete('Xpafile.orig')
  %bw!
  set patchmode=.orig nobackup nowritebackup
  edit Xpafile
  call setline(1, ['xxx'])
  write
  call assert_equal(['xxx'], readfile('Xpafile'))
  call assert_equal([], readfile('Xpafile.orig'))

  set patchmode& backup& backupskip& writebackup&
  call delete('Xpafile.orig')
endfunc

" Test for writing to a file in a readonly directory
" NOTE: if you run tests as root this will fail.  Don't run tests as root!
func Test_write_readonly_dir()
  " On MS-Windows, modifying files in a read-only directory is allowed.
  CheckUnix
  " Root can do it too.
  CheckNotRoot

  call mkdir('Xrodir/', 'R')
  call writefile(['one'], 'Xrodir/Xfile1')
  call setfperm('Xrodir', 'r-xr--r--')
  " try to create a new file in the directory
  new Xrodir/Xfile2
  call setline(1, 'two')
  call assert_fails('write', 'E212:')
  " try to create a backup file in the directory
  edit! Xrodir/Xfile1
  set backupdir=./Xrodir backupskip=
  set patchmode=.orig
  call assert_fails('write', 'E509:')
  call setfperm('Xrodir', 'rwxr--r--')
  set backupdir& backupskip& patchmode&
endfunc

" Test for writing a file using invalid file encoding
func Test_write_invalid_encoding()
  new
  call setline(1, 'abc')
  call assert_fails('write ++enc=axbyc Xiefile', 'E213:')
  close!
endfunc

" Tests for reading and writing files with conversion for Win32.
func Test_write_file_encoding()
  CheckMSWindows
  let save_encoding = &encoding
  let save_fileencodings = &fileencodings
  set encoding=latin1 fileencodings&
  let text =<< trim END
    1 utf-8 text: Для Vim version 6.2.  Последнее изменение: 1970 Jan 01
    2 cp1251 text:  Vim version 6.2.   : 1970 Jan 01
    3 cp866 text:  Vim version 6.2.  ᫥ : 1970 Jan 01
  END
  call writefile(text, 'Xwfefile', 'D')
  edit Xwfefile

  " write tests:
  " combine three values for 'encoding' with three values for 'fileencoding'
  " also write files for read tests
  call cursor(1, 1)
  set encoding=utf-8
  .w! ++enc=utf-8 Xwfetest
  .w ++enc=cp1251 >> Xwfetest
  .w ++enc=cp866 >> Xwfetest
  .w! ++enc=utf-8 Xutf8
  let expected =<< trim END
    1 utf-8 text: Для Vim version 6.2.  Последнее изменение: 1970 Jan 01
    1 utf-8 text:  Vim version 6.2.   : 1970 Jan 01
    1 utf-8 text:  Vim version 6.2.  ᫥ : 1970 Jan 01
  END
  call assert_equal(expected, readfile('Xwfetest'))

  call cursor(2, 1)
  set encoding=cp1251
  .w! ++enc=utf-8 Xwfetest
  .w ++enc=cp1251 >> Xwfetest
  .w ++enc=cp866 >> Xwfetest
  .w! ++enc=cp1251 Xcp1251
  let expected =<< trim END
    2 cp1251 text: Для Vim version 6.2.  Последнее изменение: 1970 Jan 01
    2 cp1251 text:  Vim version 6.2.   : 1970 Jan 01
    2 cp1251 text:  Vim version 6.2.  ᫥ : 1970 Jan 01
  END
  call assert_equal(expected, readfile('Xwfetest'))

  call cursor(3, 1)
  set encoding=cp866
  .w! ++enc=utf-8 Xwfetest
  .w ++enc=cp1251 >> Xwfetest
  .w ++enc=cp866 >> Xwfetest
  .w! ++enc=cp866 Xcp866
  let expected =<< trim END
    3 cp866 text: Для Vim version 6.2.  Последнее изменение: 1970 Jan 01
    3 cp866 text:  Vim version 6.2.   : 1970 Jan 01
    3 cp866 text:  Vim version 6.2.  ᫥ : 1970 Jan 01
  END
  call assert_equal(expected, readfile('Xwfetest'))

  " read three 'fileencoding's with utf-8 'encoding'
  set encoding=utf-8 fencs=utf-8,cp1251
  e Xutf8
  .w! ++enc=utf-8 Xwfetest
  e Xcp1251
  .w ++enc=utf-8 >> Xwfetest
  set fencs=utf-8,cp866
  e Xcp866
  .w ++enc=utf-8 >> Xwfetest
  let expected =<< trim END
    1 utf-8 text: Для Vim version 6.2.  Последнее изменение: 1970 Jan 01
    2 cp1251 text: Для Vim version 6.2.  Последнее изменение: 1970 Jan 01
    3 cp866 text: Для Vim version 6.2.  Последнее изменение: 1970 Jan 01
  END
  call assert_equal(expected, readfile('Xwfetest'))

  " read three 'fileencoding's with cp1251 'encoding'
  set encoding=utf-8 fencs=utf-8,cp1251
  e Xutf8
  .w! ++enc=cp1251 Xwfetest
  e Xcp1251
  .w ++enc=cp1251 >> Xwfetest
  set fencs=utf-8,cp866
  e Xcp866
  .w ++enc=cp1251 >> Xwfetest
  let expected =<< trim END
    1 utf-8 text:  Vim version 6.2.   : 1970 Jan 01
    2 cp1251 text:  Vim version 6.2.   : 1970 Jan 01
    3 cp866 text:  Vim version 6.2.   : 1970 Jan 01
  END
  call assert_equal(expected, readfile('Xwfetest'))

  " read three 'fileencoding's with cp866 'encoding'
  set encoding=cp866 fencs=utf-8,cp1251
  e Xutf8
  .w! ++enc=cp866 Xwfetest
  e Xcp1251
  .w ++enc=cp866 >> Xwfetest
  set fencs=utf-8,cp866
  e Xcp866
  .w ++enc=cp866 >> Xwfetest
  let expected =<< trim END
    1 utf-8 text:  Vim version 6.2.  ᫥ : 1970 Jan 01
    2 cp1251 text:  Vim version 6.2.  ᫥ : 1970 Jan 01
    3 cp866 text:  Vim version 6.2.  ᫥ : 1970 Jan 01
  END
  call assert_equal(expected, readfile('Xwfetest'))

  call delete('Xwfetest')
  call delete('Xutf8')
  call delete('Xcp1251')
  call delete('Xcp866')
  let &encoding = save_encoding
  let &fileencodings = save_fileencodings
  %bw!
endfunc

" Test for writing and reading a file starting with a BOM.
" Byte Order Mark (BOM) character for various encodings is below:
"     UTF-8      : EF BB BF
"     UTF-16 (BE): FE FF
"     UTF-16 (LE): FF FE
"     UTF-32 (BE): 00 00 FE FF
"     UTF-32 (LE): FF FE 00 00
func Test_readwrite_file_with_bom()
  let utf8_bom = "\xEF\xBB\xBF"
  let utf16be_bom = "\xFE\xFF"
  let utf16le_bom = "\xFF\xFE"
  let utf32be_bom = "\n\n\xFE\xFF"
  let utf32le_bom = "\xFF\xFE\n\n"
  let save_fileencoding = &fileencoding
  set cpoptions+=S

  " Check that editing a latin1 file doesn't see a BOM
  call writefile(["\xFE\xFElatin-1"], 'Xrwtest1', 'D')
  edit Xrwtest1
  call assert_equal('latin1', &fileencoding)
  call assert_equal(0, &bomb)
  set fenc=latin1
  write Xrwfile2
  call assert_equal(["\xFE\xFElatin-1", ''], readfile('Xrwfile2', 'b'))
  set bomb fenc=latin1
  write Xrwtest3
  call assert_equal(["\xFE\xFElatin-1", ''], readfile('Xrwtest3', 'b'))
  set bomb&

  " Check utf-8 BOM
  %bw!
  call writefile([utf8_bom .. "utf-8"], 'Xrwtest1')
  edit! Xrwtest1
  call assert_equal('utf-8', &fileencoding)
  call assert_equal(1, &bomb)
  call assert_equal('utf-8', getline(1))
  set fenc=latin1
  write! Xrwfile2
  call assert_equal(['utf-8', ''], readfile('Xrwfile2', 'b'))
  set fenc=utf-8
  w! Xrwtest3
  call assert_equal([utf8_bom .. "utf-8", ''], readfile('Xrwtest3', 'b'))

  " Check utf-8 with an error (will fall back to latin-1)
  %bw!
  call writefile([utf8_bom .. "utf-8\x80err"], 'Xrwtest1')
  edit! Xrwtest1
  call assert_equal('latin1', &fileencoding)
  call assert_equal(0, &bomb)
  call assert_equal("\xC3\xAF\xC2\xBB\xC2\xBFutf-8\xC2\x80err", getline(1))
  set fenc=latin1
  write! Xrwfile2
  call assert_equal([utf8_bom .. "utf-8\x80err", ''], readfile('Xrwfile2', 'b'))
  set fenc=utf-8
  w! Xrwtest3
  call assert_equal(["\xC3\xAF\xC2\xBB\xC2\xBFutf-8\xC2\x80err", ''],
        \ readfile('Xrwtest3', 'b'))

  " Check ucs-2 BOM
  %bw!
  call writefile([utf16be_bom .. "\nu\nc\ns\n-\n2\n"], 'Xrwtest1')
  edit! Xrwtest1
  call assert_equal('utf-16', &fileencoding)
  call assert_equal(1, &bomb)
  call assert_equal('ucs-2', getline(1))
  set fenc=latin1
  write! Xrwfile2
  call assert_equal(["ucs-2", ''], readfile('Xrwfile2', 'b'))
  set fenc=ucs-2
  w! Xrwtest3
  call assert_equal([utf16be_bom .. "\nu\nc\ns\n-\n2\n", ''],
        \ readfile('Xrwtest3', 'b'))

  " Check ucs-2le BOM
  %bw!
  call writefile([utf16le_bom .. "u\nc\ns\n-\n2\nl\ne\n"], 'Xrwtest1')
  " Need to add a NUL byte after the NL byte
  call writefile(0z00, 'Xrwtest1', 'a')
  edit! Xrwtest1
  call assert_equal('utf-16le', &fileencoding)
  call assert_equal(1, &bomb)
  call assert_equal('ucs-2le', getline(1))
  set fenc=latin1
  write! Xrwfile2
  call assert_equal(["ucs-2le", ''], readfile('Xrwfile2', 'b'))
  set fenc=ucs-2le
  w! Xrwtest3
  call assert_equal([utf16le_bom .. "u\nc\ns\n-\n2\nl\ne\n", "\n"],
        \ readfile('Xrwtest3', 'b'))

  " Check ucs-4 BOM
  %bw!
  call writefile([utf32be_bom .. "\n\n\nu\n\n\nc\n\n\ns\n\n\n-\n\n\n4\n\n\n"], 'Xrwtest1')
  edit! Xrwtest1
  call assert_equal('ucs-4', &fileencoding)
  call assert_equal(1, &bomb)
  call assert_equal('ucs-4', getline(1))
  set fenc=latin1
  write! Xrwfile2
  call assert_equal(["ucs-4", ''], readfile('Xrwfile2', 'b'))
  set fenc=ucs-4
  w! Xrwtest3
  call assert_equal([utf32be_bom .. "\n\n\nu\n\n\nc\n\n\ns\n\n\n-\n\n\n4\n\n\n", ''], readfile('Xrwtest3', 'b'))

  " Check ucs-4le BOM
  %bw!
  call writefile([utf32le_bom .. "u\n\n\nc\n\n\ns\n\n\n-\n\n\n4\n\n\nl\n\n\ne\n\n\n"], 'Xrwtest1')
  " Need to add three NUL bytes after the NL byte
  call writefile(0z000000, 'Xrwtest1', 'a')
  edit! Xrwtest1
  call assert_equal('ucs-4le', &fileencoding)
  call assert_equal(1, &bomb)
  call assert_equal('ucs-4le', getline(1))
  set fenc=latin1
  write! Xrwfile2
  call assert_equal(["ucs-4le", ''], readfile('Xrwfile2', 'b'))
  set fenc=ucs-4le
  w! Xrwtest3
  call assert_equal([utf32le_bom .. "u\n\n\nc\n\n\ns\n\n\n-\n\n\n4\n\n\nl\n\n\ne\n\n\n", "\n\n\n"], readfile('Xrwtest3', 'b'))

  set cpoptions-=S
  let &fileencoding = save_fileencoding
  call delete('Xrwfile2')
  call delete('Xrwtest3')
  %bw!
endfunc

func Test_read_write_bin()
  " write file missing EOL
  call writefile(['noeol'], "XNoEolSetEol", 'bSD')
  call assert_equal(0z6E6F656F6C, readfile('XNoEolSetEol', 'B'))

  " when file is read 'eol' is off
  set nofixeol
  e! ++ff=unix XNoEolSetEol
  call assert_equal(0, &eol)

  " writing with 'eol' set adds the newline
  setlocal eol
  w
  call assert_equal(0z6E6F656F6C0A, readfile('XNoEolSetEol', 'B'))

  set ff& fixeol&
  bwipe! XNoEolSetEol
endfunc

" Test for the 'backupcopy' option when writing files
func Test_backupcopy()
  CheckUnix
  set backupskip=
  " With the default 'backupcopy' setting, saving a symbolic link file
  " should not break the link.
  set backupcopy&
  call writefile(['1111'], 'Xbcfile1')
  silent !ln -s Xbcfile1 Xbcfile2
  new Xbcfile2
  call setline(1, ['2222'])
  write
  close
  call assert_equal(['2222'], readfile('Xbcfile1'))
  call assert_equal('Xbcfile1', resolve('Xbcfile2'))
  call assert_equal('link', getftype('Xbcfile2'))
  call delete('Xbcfile1')
  call delete('Xbcfile2')

  " With the 'backupcopy' set to 'breaksymlink', saving a symbolic link file
  " should break the link.
  set backupcopy=yes,breaksymlink
  call writefile(['1111'], 'Xbcfile1')
  silent !ln -s Xbcfile1 Xbcfile2
  new Xbcfile2
  call setline(1, ['2222'])
  write
  close
  call assert_equal(['1111'], readfile('Xbcfile1'))
  call assert_equal(['2222'], readfile('Xbcfile2'))
  call assert_equal('Xbcfile2', resolve('Xbcfile2'))
  call assert_equal('file', getftype('Xbcfile2'))
  call delete('Xbcfile1')
  call delete('Xbcfile2')
  set backupcopy&

  " With the default 'backupcopy' setting, saving a hard link file
  " should not break the link.
  set backupcopy&
  call writefile(['1111'], 'Xbcfile1')
  silent !ln Xbcfile1 Xbcfile2
  new Xbcfile2
  call setline(1, ['2222'])
  write
  close
  call assert_equal(['2222'], readfile('Xbcfile1'))
  call delete('Xbcfile1')
  call delete('Xbcfile2')

  " With the 'backupcopy' set to 'breaksymlink', saving a hard link file
  " should break the link.
  set backupcopy=yes,breakhardlink
  call writefile(['1111'], 'Xbcfile1')
  silent !ln Xbcfile1 Xbcfile2
  new Xbcfile2
  call setline(1, ['2222'])
  write
  call assert_equal(['1111'], readfile('Xbcfile1'))
  call assert_equal(['2222'], readfile('Xbcfile2'))
  call delete('Xbcfile1')
  call delete('Xbcfile2')

  " If a backup file is already present, then a slightly modified filename
  " should be used as the backup file. Try with 'backupcopy' set to 'yes' and
  " 'no'.
  %bw
  call writefile(['aaaa'], 'Xbcfile')
  call writefile(['bbbb'], 'Xbcfile.bak')
  set backupcopy=yes backupext=.bak
  new Xbcfile
  call setline(1, ['cccc'])
  write
  close
  call assert_equal(['cccc'], readfile('Xbcfile'))
  call assert_equal(['bbbb'], readfile('Xbcfile.bak'))
  set backupcopy=no backupext=.bak
  new Xbcfile
  call setline(1, ['dddd'])
  write
  close
  call assert_equal(['dddd'], readfile('Xbcfile'))
  call assert_equal(['bbbb'], readfile('Xbcfile.bak'))
  call delete('Xbcfile')
  call delete('Xbcfile.bak')

  " Write to a device file (in Unix-like systems) which cannot be backed up.
  if has('unix')
    set writebackup backupcopy=yes nobackup
    new
    call setline(1, ['aaaa'])
    let output = execute('write! /dev/null')
    call assert_match('"/dev/null" \[Device]', output)
    close
    set writebackup backupcopy=no nobackup
    new
    call setline(1, ['aaaa'])
    let output = execute('write! /dev/null')
    call assert_match('"/dev/null" \[Device]', output)
    close
    set backup writebackup& backupcopy&
    new
    call setline(1, ['aaaa'])
    let output = execute('write! /dev/null')
    call assert_match('"/dev/null" \[Device]', output)
    close
  endif

  set backupcopy& backupskip& backupext& backup&
endfunc

" Test for writing a file with 'encoding' set to 'utf-16'
func Test_write_utf16()
  new
  call setline(1, ["\U00010001"])
  write ++enc=utf-16 Xw16file
  bw!
  call assert_equal(0zD800DC01, readfile('Xw16file', 'B')[0:3])
  call delete('Xw16file')
endfunc

" Test for trying to save a backup file when the backup file is a symbolic
" link to the original file. The backup file should not be modified.
func Test_write_backup_symlink()
  CheckUnix
  call mkdir('Xbackup')
  let save_backupdir = &backupdir
  set backupdir=.,./Xbackup
  call writefile(['1111'], 'Xwbsfile', 'D')
  silent !ln -s Xwbsfile Xwbsfile.bak

  new Xwbsfile
  set backup backupcopy=yes backupext=.bak
  write
  call assert_equal('link', getftype('Xwbsfile.bak'))
  call assert_equal('Xwbsfile', resolve('Xwbsfile.bak'))
  " backup file should be created in the 'backup' directory
  if !has('bsd')
    " This check fails on FreeBSD
    call assert_true(filereadable('./Xbackup/Xwbsfile.bak'))
  endif
  set backup& backupcopy& backupext&
  %bw

  call delete('Xwbsfile.bak')
  call delete('Xbackup', 'rf')
  let &backupdir = save_backupdir
endfunc

" Test for ':write ++bin' and ':write ++nobin'
func Test_write_binary_file()
  " create a file without an eol/eof character
  call writefile(0z616161, 'Xwbfile1', 'bD')
  new Xwbfile1
  write ++bin Xwbfile2
  write ++nobin Xwbfile3
  call assert_equal(0z616161, readblob('Xwbfile2'))
  if has('win32')
    call assert_equal(0z6161610D.0A, readblob('Xwbfile3'))
  else
    call assert_equal(0z6161610A, readblob('Xwbfile3'))
  endif
  call delete('Xwbfile2')
  call delete('Xwbfile3')
endfunc

func DoWriteDefer()
  call writefile(['some text'], 'XdeferDelete', 'D')
  call assert_equal(['some text'], readfile('XdeferDelete'))
endfunc

def DefWriteDefer()
  writefile(['some text'], 'XdefdeferDelete', 'D')
  assert_equal(['some text'], readfile('XdefdeferDelete'))
enddef

func Test_write_with_deferred_delete()
  call DoWriteDefer()
  call assert_equal('', glob('XdeferDelete'))
  call DefWriteDefer()
  call assert_equal('', glob('XdefdeferDelete'))
endfunc

func DoWriteFile()
  call writefile(['text'], 'Xthefile', 'D')
  cd ..
endfunc

func Test_write_defer_delete_chdir()
  let dir = getcwd()
  call DoWriteFile()
  call assert_notequal(dir, getcwd())
  call chdir(dir)
  call assert_equal('', glob('Xthefile'))
endfunc

" Check that buffer is written before triggering QuitPre
func Test_wq_quitpre_autocommand()
  edit Xsomefile
  call setline(1, 'hello')
  split
  let g:seq = []
  augroup Testing
    au QuitPre * call add(g:seq, 'QuitPre - ' .. (&modified ? 'modified' : 'not modified'))
    au BufWritePost * call add(g:seq, 'written')
  augroup END
  wq
  call assert_equal(['written', 'QuitPre - not modified'], g:seq)

  augroup Testing
    au!
  augroup END
  bwipe!
  unlet g:seq
  call delete('Xsomefile')
endfunc

func Test_write_with_xattr_support()
  CheckLinux
  CheckFeature xattr
  CheckExecutable setfattr

  let contents = ["file with xattrs", "line two"]
  call writefile(contents, 'Xwattr.txt', 'D')
  " write a couple of xattr
  call system('setfattr -n user.cookie -v chocolate Xwattr.txt')
  call system('setfattr -n user.frieda -v bar Xwattr.txt')
  call system('setfattr -n user.empty Xwattr.txt')

  set backupcopy=no writebackup& backup&
  sp Xwattr.txt
  w
  $r! getfattr -d %
  let expected = ['file with xattrs', 'line two', '# file: Xwattr.txt', 'user.cookie="chocolate"', 'user.empty=""', 'user.frieda="bar"', '']
  call assert_equal(expected, getline(1,'$'))

  set backupcopy&
  bw!
endfunc

" vim: shiftwidth=2 sts=2 expandtab