patch 8.0.1793: no test for "vim -g"

Problem:    No test for "vim -g".
Solution:   Add a test for "-g" and "-y".

src/testdir/shared.vim

@@ -227,6 +227,8 @@ func GetVimProg()
  return readfile('vimcmd')[0]
endfunc

let g:valgrind_cnt = 1

" Get the command to run Vim, with -u NONE and --not-a-term arguments.
" If there is an argument use it instead of "NONE".
func GetVimCommand(...)
@@ -244,14 +246,26 @@ func GetVimCommand(...)
  " For Unix Makefile writes the command to use in the second line of the
  " "vimcmd" file, including environment options.
  " Other Makefiles just write the executable in the first line, so fall back
  " to that if there is no second line.
  let cmd = get(lines, 1, lines[0])
  " to that if there is no second line or it is empty.
  if len(lines) > 1 && lines[1] != ''
    let cmd = lines[1]
  else
    let cmd = lines[0]
  endif

  let cmd = substitute(cmd, '-u \f\+', '-u ' . name, '')
  if cmd !~ '-u '. name
    let cmd = cmd . ' -u ' . name
  endif
  let cmd .= ' --not-a-term'
  let cmd = substitute(cmd, 'VIMRUNTIME=.*VIMRUNTIME;', '', '')

  " If using valgrind, make sure every run uses a different log file.
  if cmd =~ 'valgrind.*--log-file='
    let cmd = substitute(cmd, '--log-file=\(^\s*\)', '--log-file=\1.' . g:valgrind_cnt, '')
    let g:valgrind_cnt += 1
  endif

  return cmd
endfunc

@@ -274,9 +288,6 @@ endfunc

func RunVimPiped(before, after, arguments, pipecmd)
  let cmd = GetVimCommand()
  if cmd == ''
    return 0
  endif
  let args = ''
  if len(a:before) > 0
    call writefile(a:before, 'Xbefore.vim')

src/testdir/test_gui.vim

@@ -706,3 +706,33 @@ func Test_windowid_variable()
    call assert_equal(0, v:windowid)
  endif
endfunc

" Test "vim -g" and also the GUIEnter autocommand.
func Test_gui_dash_g()
  let cmd = GetVimCommand('Xscriptgui')
  call writefile([""], "Xtestgui")
  call writefile([
	\ 'au GUIEnter * call writefile(["insertmode: " . &insertmode], "Xtestgui")',
	\ 'au GUIEnter * qall',
	\ ], 'Xscriptgui')
  call system(cmd . ' -g')
  call WaitForAssert({-> assert_equal(['insertmode: 0'], readfile('Xtestgui'))})

  call delete('Xscriptgui')
  call delete('Xtestgui')
endfunc

" Test "vim -7" and also the GUIEnter autocommand.
func Test_gui_dash_y()
  let cmd = GetVimCommand('Xscriptgui')
  call writefile([""], "Xtestgui")
  call writefile([
	\ 'au GUIEnter * call writefile(["insertmode: " . &insertmode], "Xtestgui")',
	\ 'au GUIEnter * qall',
	\ ], 'Xscriptgui')
  call system(cmd . ' -y')
  call WaitForAssert({-> assert_equal(['insertmode: 1'], readfile('Xtestgui'))})

  call delete('Xscriptgui')
  call delete('Xtestgui')
endfunc

src/version.c

@@ -761,6 +761,8 @@ static char *(features[]) =

static int included_patches[] =
{   /* Add new patch number below this line */
/**/
    1793,
/**/
    1792,
/**/