vim-patch:8.2.0049: command line completion not fully tested

Problem:    Command line completion not fully tested.
Solution:   Add more test cases.  Make help sorting stable. (Dominique Pelle,
            closes vim/vim#5402)
297610ba4b

src/nvim/ex_cmds.c

@@ -5019,7 +5019,15 @@ static int help_compare(const void *s1, const void *s2)
 
   p1 = *(char **)s1 + strlen(*(char **)s1) + 1;
   p2 = *(char **)s2 + strlen(*(char **)s2) + 1;
-  return strcmp(p1, p2);
+
+  // Compare by help heuristic number first.
+  int cmp = strcmp(p1, p2);
+  if (cmp != 0) {
+    return cmp;
+  }
+
+  // Compare by strings as tie-breaker when same heuristic number.
+  return strcmp(*(char **)s1, *(char **)s2);
 }
 
 /// Find all help tags matching "arg", sort them and return in matches[], with

src/nvim/testdir/test_cd.vim

@@ -225,6 +225,21 @@ func Test_cd_from_non_existing_dir()
   call assert_equal(saveddir, getcwd())
 endfunc
 
+func Test_cd_completion()
+  call mkdir('XComplDir1', 'p')
+  call mkdir('XComplDir2', 'p')
+  call writefile([], 'XComplFile')
+
+  for cmd in ['cd', 'chdir', 'lcd', 'lchdir', 'tcd', 'tchdir']
+    call feedkeys(':' .. cmd .. " XCompl\<C-A>\<C-B>\"\<CR>", 'tx')
+    call assert_equal('"' .. cmd .. ' XComplDir1/ XComplDir2/', @:)
+  endfor
+
+  call delete('XComplDir1', 'd')
+  call delete('XComplDir2', 'd')
+  call delete('XComplFile')
+endfunc
+
 func Test_cd_unknown_dir()
   call mkdir('Xa')
   cd Xa

src/nvim/testdir/test_cmdline.vim

@@ -757,6 +757,15 @@ funct Test_cmdline_complete_languages()
   endif
 endfunc
 
+func Test_cmdline_complete_env_variable()
+  let $X_VIM_TEST_COMPLETE_ENV = 'foo'
+
+  call feedkeys(":edit $X_VIM_TEST_COMPLETE_E\<C-A>\<C-B>\"\<CR>", 'tx')
+  call assert_match('"edit $X_VIM_TEST_COMPLETE_ENV', @:)
+
+  unlet $X_VIM_TEST_COMPLETE_ENV
+endfunc
+
 func Test_cmdline_complete_expression()
   let g:SomeVar = 'blah'
   for cmd in ['exe', 'echo', 'echon', 'echomsg']

src/nvim/testdir/test_help.vim

@@ -92,6 +92,11 @@ func Test_help_local_additions()
   let &rtp = rtp_save
 endfunc
 
+func Test_help_completion()
+  call feedkeys(":help :undo\<C-A>\<C-B>\"\<CR>", 'tx')
+  call assert_equal('"help :undo :undoj :undol :undojoin :undolist', @:)
+endfunc
+
 " Test for the :helptags command
 func Test_helptag_cmd()
   call mkdir('Xdir/a/doc', 'p')

src/nvim/testdir/test_menu.vim

@@ -46,6 +46,10 @@ func Test_menu_commands()
   imenu 2 Test.FooBar :let g:did_menu = 'insert'<CR>
   cmenu 2 Test.FooBar :let g:did_menu = 'cmdline'<CR>
   emenu n Test.FooBar
+
+  call feedkeys(":menu Test.FooB\<C-A>\<C-B>\"\<CR>", 'tx')
+  call assert_equal('"menu Test.FooBar', @:)
+
   call assert_equal('normal', g:did_menu)
   emenu v Test.FooBar
   call assert_equal('visual', g:did_menu)

src/nvim/testdir/test_options.vim

@@ -238,6 +238,12 @@ func Test_set_completion()
   call feedkeys(":set di\<C-A>\<C-B>\"\<CR>", 'tx')
   call assert_equal('"set dictionary diff diffexpr diffopt digraph directory display', @:)
 
+  call feedkeys(":setlocal di\<C-A>\<C-B>\"\<CR>", 'tx')
+  call assert_equal('"setlocal dictionary diff diffexpr diffopt digraph directory display', @:)
+
+  call feedkeys(":setglobal di\<C-A>\<C-B>\"\<CR>", 'tx')
+  call assert_equal('"setglobal dictionary diff diffexpr diffopt digraph directory display', @:)
+
   " Expand boolan options. When doing :set no<Tab>
   " vim displays the options names without "no" but completion uses "no...".
   call feedkeys(":set nodi\<C-A>\<C-B>\"\<CR>", 'tx')
@@ -268,6 +274,7 @@ func Test_set_completion()
 
   call feedkeys(":set tags=./\\\\ dif\<C-A>\<C-B>\"\<CR>", 'tx')
   call assert_equal('"set tags=./\\ diff diffexpr diffopt', @:)
+
   set tags&
 
   " Expand values for 'filetype'

src/nvim/testdir/test_syntax.vim

@@ -197,6 +197,12 @@ func Test_syntax_completion()
   call assert_match('^"syn match Boolean Character ', @:)
 endfunc
 
+func Test_echohl_completion()
+  call feedkeys(":echohl no\<C-A>\<C-B>\"\<CR>", 'tx')
+  " call assert_equal('"echohl NonText Normal none', @:)
+  call assert_equal('"echohl NonText Normal NormalFloat NormalNC none', @:)
+endfunc
+
 func Test_syntax_arg_skipped()
   syn clear
   syntax case ignore