--- a/src/testdir/test_cmdline.vim
+++ b/src/testdir/test_cmdline.vim
@@ -2,6 +2,7 @@
 
 source check.vim
 source screendump.vim
+source view_util.vim
 
 func Test_complete_tab()
   call writefile(['testfile'], 'Xtestfile')
@@ -401,6 +402,7 @@ func Test_getcompletion()
   set tags&
 
   call assert_fails('call getcompletion("", "burp")', 'E475:')
+  call assert_fails('call getcompletion("abc", [])', 'E474:')
 endfunc
 
 func Test_shellcmd_completion()
@@ -641,6 +643,149 @@ func Test_cmdline_complete_env_variable(
   unlet $X_VIM_TEST_COMPLETE_ENV
 endfunc
 
+" Test for various command-line completion
+func Test_cmdline_complete_various()
+  " completion for a command starting with a comment
+  call feedkeys(": :|\"\<C-A>\<C-B>\"\<CR>", 'xt')
+  call assert_equal("\" :|\"\<C-A>", @:)
+
+  " completion for a range followed by a comment
+  call feedkeys(":1,2\"\<C-A>\<C-B>\"\<CR>", 'xt')
+  call assert_equal("\"1,2\"\<C-A>", @:)
+
+  " completion for :k command
+  call feedkeys(":ka\<C-A>\<C-B>\"\<CR>", 'xt')
+  call assert_equal("\"ka\<C-A>", @:)
+
+  " completion for short version of the :s command
+  call feedkeys(":sI \<C-A>\<C-B>\"\<CR>", 'xt')
+  call assert_equal("\"sI \<C-A>", @:)
+
+  " completion for :write command
+  call mkdir('Xdir')
+  call writefile(['one'], 'Xdir/Xfile1')
+  let save_cwd = getcwd()
+  cd Xdir
+  call feedkeys(":w >> \<C-A>\<C-B>\"\<CR>", 'xt')
+  call assert_equal("\"w >> Xfile1", @:)
+  call chdir(save_cwd)
+  call delete('Xdir', 'rf')
+
+  " completion for :w ! and :r ! commands
+  call feedkeys(":w !invalid_xyz_cmd\<C-A>\<C-B>\"\<CR>", 'xt')
+  call assert_equal("\"w !invalid_xyz_cmd", @:)
+  call feedkeys(":r !invalid_xyz_cmd\<C-A>\<C-B>\"\<CR>", 'xt')
+  call assert_equal("\"r !invalid_xyz_cmd", @:)
+
+  " completion for :>> and :<< commands
+  call feedkeys(":>>>\<C-A>\<C-B>\"\<CR>", 'xt')
+  call assert_equal("\">>>\<C-A>", @:)
+  call feedkeys(":<<<\<C-A>\<C-B>\"\<CR>", 'xt')
+  call assert_equal("\"<<<\<C-A>", @:)
+
+  " completion for command with +cmd argument
+  call feedkeys(":buffer +/pat Xabc\<C-A>\<C-B>\"\<CR>", 'xt')
+  call assert_equal("\"buffer +/pat Xabc", @:)
+  call feedkeys(":buffer +/pat\<C-A>\<C-B>\"\<CR>", 'xt')
+  call assert_equal("\"buffer +/pat\<C-A>", @:)
+
+  " completion for a command with a trailing comment
+  call feedkeys(":ls \" comment\<C-A>\<C-B>\"\<CR>", 'xt')
+  call assert_equal("\"ls \" comment\<C-A>", @:)
+
+  " completion for a command with a trailing command
+  call feedkeys(":ls | ls\<C-A>\<C-B>\"\<CR>", 'xt')
+  call assert_equal("\"ls | ls", @:)
+
+  " completion for a command with an CTRL-V escaped argument
+  call feedkeys(":ls \<C-V>\<C-V>a\<C-A>\<C-B>\"\<CR>", 'xt')
+  call assert_equal("\"ls \<C-V>a\<C-A>", @:)
+
+  " completion for a command that doesn't take additional arguments
+  call feedkeys(":all abc\<C-A>\<C-B>\"\<CR>", 'xt')
+  call assert_equal("\"all abc\<C-A>", @:)
+
+  " completion for a command with a command modifier
+  call feedkeys(":topleft new\<C-A>\<C-B>\"\<CR>", 'xt')
+  call assert_equal("\"topleft new", @:)
+
+  " completion for the :match command
+  call feedkeys(":match Search /pat/\<C-A>\<C-B>\"\<CR>", 'xt')
+  call assert_equal("\"match Search /pat/\<C-A>", @:)
+
+  " completion for the :s command
+  call feedkeys(":s/from/to/g\<C-A>\<C-B>\"\<CR>", 'xt')
+  call assert_equal("\"s/from/to/g\<C-A>", @:)
+
+  " completion for the :dlist command
+  call feedkeys(":dlist 10 /pat/ a\<C-A>\<C-B>\"\<CR>", 'xt')
+  call assert_equal("\"dlist 10 /pat/ a\<C-A>", @:)
+
+  " completion for the :doautocmd command
+  call feedkeys(":doautocmd User MyCmd a.c\<C-A>\<C-B>\"\<CR>", 'xt')
+  call assert_equal("\"doautocmd User MyCmd a.c\<C-A>", @:)
+
+  " completion for the :augroup command
+  augroup XTest
+  augroup END
+  call feedkeys(":augroup X\<C-A>\<C-B>\"\<CR>", 'xt')
+  call assert_equal("\"augroup XTest", @:)
+  augroup! XTest
+
+  " completion for the :unlet command
+  call feedkeys(":unlet one two\<C-A>\<C-B>\"\<CR>", 'xt')
+  call assert_equal("\"unlet one two", @:)
+
+  " completion for the :bdelete command
+  call feedkeys(":bdel a b c\<C-A>\<C-B>\"\<CR>", 'xt')
+  call assert_equal("\"bdel a b c", @:)
+
+  " completion for the :mapclear command
+  call feedkeys(":mapclear \<C-A>\<C-B>\"\<CR>", 'xt')
+  call assert_equal("\"mapclear <buffer>", @:)
+
+  " completion for user defined commands with menu names
+  menu Test.foo :ls<CR>
+  com -nargs=* -complete=menu MyCmd
+  call feedkeys(":MyCmd Te\<C-A>\<C-B>\"\<CR>", 'xt')
+  call assert_equal('"MyCmd Test.', @:)
+  delcom MyCmd
+  unmenu Test
+
+  " completion for user defined commands with mappings
+  mapclear
+  map <F3> :ls<CR>
+  com -nargs=* -complete=mapping MyCmd
+  call feedkeys(":MyCmd <F\<C-A>\<C-B>\"\<CR>", 'xt')
+  call assert_equal('"MyCmd <F3>', @:)
+  mapclear
+  delcom MyCmd
+
+  " completion for :set path= with multiple backslashes
+  call feedkeys(":set path=a\\\\\\ b\<C-A>\<C-B>\"\<CR>", 'xt')
+  call assert_equal('"set path=a\\\ b', @:)
+
+  " completion for :set dir= with a backslash
+  call feedkeys(":set dir=a\\ b\<C-A>\<C-B>\"\<CR>", 'xt')
+  call assert_equal('"set dir=a\ b', @:)
+
+  " completion for the :py3 commands
+  call feedkeys(":py3\<C-A>\<C-B>\"\<CR>", 'xt')
+  call assert_equal('"py3 py3do py3file', @:)
+
+  " redir @" is not the start of a comment. So complete after that
+  call feedkeys(":redir @\" | cwin\t\<C-B>\"\<CR>", 'xt')
+  call assert_equal('"redir @" | cwindow', @:)
+
+  " completion after a backtick
+  call feedkeys(":e `a1b2c\t\<C-B>\"\<CR>", 'xt')
+  call assert_equal('"e `a1b2c', @:)
+
+  " completion for the expression register
+  call feedkeys(":\"\<C-R>=float2\t\"\<C-B>\"\<CR>", 'xt')
+  call assert_equal('"float2nr("', @=)
+endfunc
+
 func Test_cmdline_write_alternatefile()
   new
   call setline('.', ['one', 'two'])
@@ -1116,15 +1261,6 @@ func Test_cmdline_ctrl_g()
   close!
 endfunc
 
-" Return the 'len' characters in screen starting from (row,col)
-func s:ScreenLine(row, col, len)
-  let s = ''
-  for i in range(a:len)
-    let s .= nr2char(screenchar(a:row, a:col + i))
-  endfor
-  return s
-endfunc
-
 " Test for 'wildmode'
 func Test_wildmode()
   func T(a, c, p)
@@ -1133,7 +1269,7 @@ func Test_wildmode()
   command -nargs=1 -complete=custom,T MyCmd
 
   func SaveScreenLine()
-    let g:Sline = s:ScreenLine(&lines - 1, 1, 20)
+    let g:Sline = Screenline(&lines - 1)
     return ''
   endfunc
   cnoremap <expr> <F2> SaveScreenLine()
@@ -1142,7 +1278,7 @@ func Test_wildmode()
   set wildmode=full,list
   let g:Sline = ''
   call feedkeys(":MyCmd \t\t\<F2>\<C-B>\"\<CR>", 'xt')
-  call assert_equal('oneA  oneB  oneC    ', g:Sline)
+  call assert_equal('oneA  oneB  oneC', g:Sline)
   call assert_equal('"MyCmd oneA', @:)
 
   set wildmode=longest,full
@@ -1158,18 +1294,35 @@ func Test_wildmode()
   set wildmode=list:longest
   let g:Sline = ''
   call feedkeys(":MyCmd \t\<F2>\<C-B>\"\<CR>", 'xt')
-  call assert_equal('oneA  oneB  oneC    ', g:Sline)
+  call assert_equal('oneA  oneB  oneC', g:Sline)
   call assert_equal('"MyCmd one', @:)
 
   set wildmode=""
   call feedkeys(":MyCmd \t\t\<C-B>\"\<CR>", 'xt')
   call assert_equal('"MyCmd oneA', @:)
 
+  " Test for wildmode=longest with 'fileignorecase' set
+  set wildmode=longest
+  set fileignorecase
+  argadd AA AAA AAAA
+  call feedkeys(":buffer \t\<C-B>\"\<CR>", 'xt')
+  call assert_equal('"buffer AA', @:)
+  set fileignorecase&
+
+  " Test for listing files with wildmode=list
+  set wildmode=list
+  let g:Sline = ''
+  call feedkeys(":b A\t\t\<F2>\<C-B>\"\<CR>", 'xt')
+  call assert_equal('AA    AAA   AAAA', g:Sline)
+  call assert_equal('"b A', @:)
+
+  %argdelete
   delcommand MyCmd
   delfunc T
   delfunc SaveScreenLine
   cunmap <F2>
   set wildmode&
+  %bwipe!
 endfunc
 
 " Test for interrupting the command-line completion