Patch 8.2.2837
Problem:    Various code lines not covered by tests.
Solution:   Add test cases. (Dominique Pellé, closes #8178)
Files:      src/testdir/test_excmd.vim, src/testdir/test_functions.vim,
            src/testdir/test_options.vim, src/testdir/test_startup.vim,
            src/testdir/test_syntax.vim, src/testdir/test_vim9_cmd.vim


*** ../vim-8.2.2836/src/testdir/test_excmd.vim  2021-05-02 20:16:19.991169536 
+0200
--- src/testdir/test_excmd.vim  2021-05-06 17:34:05.624332883 +0200
***************
*** 591,594 ****
--- 591,600 ----
    sandbox call Sandbox_tests()
  endfunc
  
+ func Test_command_not_implemented_E319()
+   if !has('mzscheme')
+     call assert_fails('mzscheme', 'E319:')
+   endif
+ endfunc
+ 
  " vim: shiftwidth=2 sts=2 expandtab
*** ../vim-8.2.2836/src/testdir/test_functions.vim      2021-04-14 
17:06:39.928955007 +0200
--- src/testdir/test_functions.vim      2021-05-06 17:34:05.624332883 +0200
***************
*** 1148,1154 ****
--- 1148,1156 ----
    call assert_equal(2, charidx(a, 4))
    call assert_equal(3, charidx(a, 7))
    call assert_equal(-1, charidx(a, 8))
+   call assert_equal(-1, charidx(a, -1))
    call assert_equal(-1, charidx('', 0))
+   call assert_equal(-1, charidx(test_null_string(), 0))
  
    " count composing characters
    call assert_equal(0, charidx(a, 0, 1))
*** ../vim-8.2.2836/src/testdir/test_options.vim        2021-03-13 
14:28:59.339594607 +0100
--- src/testdir/test_options.vim        2021-05-06 17:34:05.624332883 +0200
***************
*** 1093,1096 ****
--- 1093,1124 ----
    call delete('Xscroll')
  endfunc
  
+ " Check that VIM_POSIX env variable influences default value of 'cpo' and 
'shm'
+ func Test_VIM_POSIX()
+   let saved_VIM_POSIX = getenv("VIM_POSIX")
+ 
+   call setenv('VIM_POSIX', "1")
+   let after =<< trim [CODE]
+     call writefile([&cpo, &shm], 'X_VIM_POSIX')
+     qall
+   [CODE]
+   if RunVim([], after, '')
+     call 
assert_equal(['aAbBcCdDeEfFgHiIjJkKlLmMnoOpPqrRsStuvwWxXyZ$!%*-+<>#{|&/\.;',
+           \            'AS'], readfile('X_VIM_POSIX'))
+   endif
+ 
+   call setenv('VIM_POSIX', v:null)
+   let after =<< trim [CODE]
+     call writefile([&cpo, &shm], 'X_VIM_POSIX')
+     qall
+   [CODE]
+   if RunVim([], after, '')
+     call assert_equal(['aAbBcCdDeEfFgHiIjJkKlLmMnoOpPqrRsStuvwWxXyZ$!%*-+<>;',
+           \            'S'], readfile('X_VIM_POSIX'))
+   endif
+ 
+   call delete('X_VIM_POSIX')
+   call setenv('VIM_POSIX', saved_VIM_POSIX)
+ endfunc
+ 
  " vim: shiftwidth=2 sts=2 expandtab
*** ../vim-8.2.2836/src/testdir/test_startup.vim        2021-03-27 
12:11:29.914607383 +0100
--- src/testdir/test_startup.vim        2021-05-06 17:34:05.624332883 +0200
***************
*** 622,627 ****
--- 622,633 ----
    endfor
  
    if has('gui_gtk')
+     let out = split(system(GetVimCommand() .. ' --socketid'), "\n")
+     call assert_equal(1, v:shell_error)
+     call assert_match('^VIM - Vi IMproved .* (.*)$',          out[0])
+     call assert_equal('Argument missing after: "--socketid"', out[1])
+     call assert_equal('More info with: "vim -h"',             out[2])
+ 
      for opt in ['--socketid x', '--socketid 0xg']
        let out = split(system(GetVimCommand() .. ' ' .. opt), "\n")
        call assert_equal(1, v:shell_error)
***************
*** 629,634 ****
--- 635,641 ----
        call assert_equal('Invalid argument for: "--socketid"', out[1])
        call assert_equal('More info with: "vim -h"',           out[2])
      endfor
+ 
    endif
  endfunc
  
*** ../vim-8.2.2836/src/testdir/test_syntax.vim 2021-04-14 11:15:05.336785013 
+0200
--- src/testdir/test_syntax.vim 2021-05-06 17:34:05.624332883 +0200
***************
*** 111,116 ****
--- 111,119 ----
    let a = execute('syntime report')
    call assert_equal("\nNo Syntax items defined for this buffer", a)
  
+   let a = execute('syntime clear')
+   call assert_equal("\nNo Syntax items defined for this buffer", a)
+ 
    view ../memfile_test.c
    setfiletype cpp
    redraw
*** ../vim-8.2.2836/src/testdir/test_vim9_cmd.vim       2021-04-26 
20:32:54.918399234 +0200
--- src/testdir/test_vim9_cmd.vim       2021-05-06 17:34:05.624332883 +0200
***************
*** 13,18 ****
--- 13,19 ----
      vim9cm assert_equal('yes', y)
    END
    CheckScriptSuccess(lines)
+   assert_fails('vim9cmd', 'E1164:')
  enddef
  
  def Test_edit_wildcards()
*** ../vim-8.2.2836/src/version.c       2021-05-05 22:51:35.631336525 +0200
--- src/version.c       2021-05-06 17:36:16.008075287 +0200
***************
*** 752,753 ****
--- 752,755 ----
  {   /* Add new patch number below this line */
+ /**/
+     2837,
  /**/

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