From f7c6676199f222162dc4ec448857ac64faa26f87 Mon Sep 17 00:00:00 2001
From: zeertzjq <zeertzjq@outlook.com>
Date: Sat, 16 Jul 2022 20:35:07 +0800
Subject: vim-patch:8.2.0052: more-prompt not properly tested

Problem:    More-prompt not properly tested.
Solution:   Add a test case. (Dominique Pelle, closes vim/vim#5404)
https://github.com/vim/vim/commit/c6d539b67181ad573452e919e58ecbfa362f4c49
---
 src/nvim/testdir/test_messages.vim | 95 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 95 insertions(+)

(limited to 'src')

diff --git a/src/nvim/testdir/test_messages.vim b/src/nvim/testdir/test_messages.vim
index 8be0c79499..6954b4bc91 100644
--- a/src/nvim/testdir/test_messages.vim
+++ b/src/nvim/testdir/test_messages.vim
@@ -112,6 +112,101 @@ func Test_echospace()
   set ruler& showcmd&
 endfunc
 
+" Test more-prompt (see :help more-prompt).
+func Test_message_more()
+  if !CanRunVimInTerminal()
+    throw 'Skipped: cannot run vim in terminal'
+  endif
+  let buf = RunVimInTerminal('', {'rows': 6})
+  call term_sendkeys(buf, ":call setline(1, range(1, 100))\n")
+
+  call term_sendkeys(buf, ":%p#\n")
+  call WaitForAssert({-> assert_equal('  5 5', term_getline(buf, 5))})
+  call WaitForAssert({-> assert_equal('-- More --', term_getline(buf, 6))})
+
+  call term_sendkeys(buf, '?')
+  call WaitForAssert({-> assert_equal('  5 5', term_getline(buf, 5))})
+  call WaitForAssert({-> assert_equal('-- More -- SPACE/d/j: screen/page/line down, b/u/k: up, q: quit ', term_getline(buf, 6))})
+
+  " Down a line with j, <CR>, <NL> or <Down>.
+  call term_sendkeys(buf, "j")
+  call WaitForAssert({-> assert_equal('  6 6', term_getline(buf, 5))})
+  call WaitForAssert({-> assert_equal('-- More --', term_getline(buf, 6))})
+  call term_sendkeys(buf, "\<NL>")
+  call WaitForAssert({-> assert_equal('  7 7', term_getline(buf, 5))})
+  call term_sendkeys(buf, "\<CR>")
+  call WaitForAssert({-> assert_equal('  8 8', term_getline(buf, 5))})
+  call term_sendkeys(buf, "\<Down>")
+  call WaitForAssert({-> assert_equal('  9 9', term_getline(buf, 5))})
+
+  " Down a screen with <Space>, f, or <PageDown>.
+  call term_sendkeys(buf, 'f')
+  call WaitForAssert({-> assert_equal(' 14 14', term_getline(buf, 5))})
+  call WaitForAssert({-> assert_equal('-- More --', term_getline(buf, 6))})
+  call term_sendkeys(buf, ' ')
+  call WaitForAssert({-> assert_equal(' 19 19', term_getline(buf, 5))})
+  call term_sendkeys(buf, "\<PageDown>")
+  call WaitForAssert({-> assert_equal(' 24 24', term_getline(buf, 5))})
+
+  " Down a page (half a screen) with d.
+  call term_sendkeys(buf, 'd')
+  call WaitForAssert({-> assert_equal(' 27 27', term_getline(buf, 5))})
+
+  " Down all the way with 'G'.
+  call term_sendkeys(buf, 'G')
+  call WaitForAssert({-> assert_equal('100 100', term_getline(buf, 5))})
+  call WaitForAssert({-> assert_equal('Press ENTER or type command to continue', term_getline(buf, 6))})
+
+  " Up a line k, <BS> or <Up>.
+  call term_sendkeys(buf, 'k')
+  call WaitForAssert({-> assert_equal(' 99 99', term_getline(buf, 5))})
+  call term_sendkeys(buf, "\<BS>")
+  call WaitForAssert({-> assert_equal(' 98 98', term_getline(buf, 5))})
+  call term_sendkeys(buf, "\<Up>")
+  call WaitForAssert({-> assert_equal(' 97 97', term_getline(buf, 5))})
+
+  " Up a screen with b or <PageUp>.
+  call term_sendkeys(buf, 'b')
+  call WaitForAssert({-> assert_equal(' 92 92', term_getline(buf, 5))})
+  call term_sendkeys(buf, "\<PageUp>")
+  call WaitForAssert({-> assert_equal(' 87 87', term_getline(buf, 5))})
+
+  " Up a page (half a screen) with u.
+  call term_sendkeys(buf, 'u')
+  call WaitForAssert({-> assert_equal(' 84 84', term_getline(buf, 5))})
+
+  " Up all the way with 'g'.
+  call term_sendkeys(buf, 'g')
+  call WaitForAssert({-> assert_equal('  5 5', term_getline(buf, 5))})
+  call WaitForAssert({-> assert_equal('-- More --', term_getline(buf, 6))})
+
+  " All the way down. Pressing f should do nothing but pressing
+  " space should end the more prompt.
+  call term_sendkeys(buf, 'G')
+  call WaitForAssert({-> assert_equal('100 100', term_getline(buf, 5))})
+  call WaitForAssert({-> assert_equal('Press ENTER or type command to continue', term_getline(buf, 6))})
+  call term_sendkeys(buf, 'f')
+  call WaitForAssert({-> assert_equal('100 100', term_getline(buf, 5))})
+  call term_sendkeys(buf, ' ')
+  call WaitForAssert({-> assert_equal('100', term_getline(buf, 5))})
+
+  " Pressing g< shows the previous command output.
+  call term_sendkeys(buf, 'g<')
+  call WaitForAssert({-> assert_equal('100 100', term_getline(buf, 5))})
+  call WaitForAssert({-> assert_equal('Press ENTER or type command to continue', term_getline(buf, 6))})
+
+  call term_sendkeys(buf, ":%p#\n")
+  call WaitForAssert({-> assert_equal('  5 5', term_getline(buf, 5))})
+  call WaitForAssert({-> assert_equal('-- More --', term_getline(buf, 6))})
+
+  " Stop command output with q, <Esc> or CTRL-C.
+  call term_sendkeys(buf, 'q')
+  call WaitForAssert({-> assert_equal('100', term_getline(buf, 5))})
+
+  call term_sendkeys(buf, ':q!')
+  call StopVimInTerminal(buf)
+endfunc
+
 func Test_mapping_at_hit_return_prompt()
   nnoremap <C-B> :echo "hit ctrl-b"<CR>
   call feedkeys(":ls\<CR>", "xt")
-- 
cgit 


From bc73795a5858129a84d510f682c9dcb17aa1813a Mon Sep 17 00:00:00 2001
From: zeertzjq <zeertzjq@outlook.com>
Date: Sat, 16 Jul 2022 21:14:54 +0800
Subject: vim-patch:8.2.0198: no tests for y/n prompt

Problem:    No tests for y/n prompt.
Solution:   Add tests. (Dominique Pelle, closes vim/vim#5564)
https://github.com/vim/vim/commit/43c60eda2aa22ba3d7aaf418cfbdb75f1a008e67
---
 src/nvim/testdir/test_messages.vim | 32 +++++++++++++++++++++++++++++++-
 1 file changed, 31 insertions(+), 1 deletion(-)

(limited to 'src')

diff --git a/src/nvim/testdir/test_messages.vim b/src/nvim/testdir/test_messages.vim
index 6954b4bc91..fb6c9c1554 100644
--- a/src/nvim/testdir/test_messages.vim
+++ b/src/nvim/testdir/test_messages.vim
@@ -203,7 +203,37 @@ func Test_message_more()
   call term_sendkeys(buf, 'q')
   call WaitForAssert({-> assert_equal('100', term_getline(buf, 5))})
 
-  call term_sendkeys(buf, ':q!')
+  call term_sendkeys(buf, ":q!\n")
+  call StopVimInTerminal(buf)
+endfunc
+
+func Test_ask_yesno()
+  if !CanRunVimInTerminal()
+    throw 'Skipped: cannot run vim in terminal'
+  endif
+  let buf = RunVimInTerminal('', {'rows': 6})
+  call term_sendkeys(buf, ":call setline(1, range(1, 2))\n")
+
+  call term_sendkeys(buf, ":2,1s/^/n/\n")
+  call WaitForAssert({-> assert_equal('Backwards range given, OK to swap (y/n)?', term_getline(buf, 6))})
+  call term_sendkeys(buf, "n")
+  call WaitForAssert({-> assert_match('^Backwards range given, OK to swap (y/n)?n *1,1 *All$', term_getline(buf, 6))})
+  call WaitForAssert({-> assert_equal('1', term_getline(buf, 1))})
+
+  call term_sendkeys(buf, ":2,1s/^/Esc/\n")
+  call WaitForAssert({-> assert_equal('Backwards range given, OK to swap (y/n)?', term_getline(buf, 6))})
+  call term_sendkeys(buf, "\<Esc>")
+  call WaitForAssert({-> assert_match('^Backwards range given, OK to swap (y/n)?n *1,1 *All$', term_getline(buf, 6))})
+  call WaitForAssert({-> assert_equal('1', term_getline(buf, 1))})
+
+  call term_sendkeys(buf, ":2,1s/^/y/\n")
+  call WaitForAssert({-> assert_equal('Backwards range given, OK to swap (y/n)?', term_getline(buf, 6))})
+  call term_sendkeys(buf, "y")
+  call WaitForAssert({-> assert_match('^Backwards range given, OK to swap (y/n)?y *2,1 *All$', term_getline(buf, 6))})
+  call WaitForAssert({-> assert_equal('y1', term_getline(buf, 1))})
+  call WaitForAssert({-> assert_equal('y2', term_getline(buf, 2))})
+
+  call term_sendkeys(buf, ":q!\n")
   call StopVimInTerminal(buf)
 endfunc
 
-- 
cgit 


From 780edfc0eb1293f5813d904ad61fc65bbbb41784 Mon Sep 17 00:00:00 2001
From: zeertzjq <zeertzjq@outlook.com>
Date: Sat, 16 Jul 2022 21:39:05 +0800
Subject: vim-patch:8.2.2608: character input not fully tested

Problem:    Character input not fully tested.
Solution:   Add more tests. (Yegappan Lakshmanan, closes vim/vim#7963)
https://github.com/vim/vim/commit/f4fcedc59d4cc5ae6b5270a933e8377030283c1c

Cherry-pick related changes from patches 8.2.{0433,0866}.
---
 src/nvim/testdir/test_messages.vim  | 21 +++++++++++++--------
 src/nvim/testdir/test_registers.vim | 10 ++++++++++
 src/nvim/testdir/test_undo.vim      | 14 ++++++++++++++
 3 files changed, 37 insertions(+), 8 deletions(-)

(limited to 'src')

diff --git a/src/nvim/testdir/test_messages.vim b/src/nvim/testdir/test_messages.vim
index fb6c9c1554..5670368936 100644
--- a/src/nvim/testdir/test_messages.vim
+++ b/src/nvim/testdir/test_messages.vim
@@ -114,9 +114,7 @@ endfunc
 
 " Test more-prompt (see :help more-prompt).
 func Test_message_more()
-  if !CanRunVimInTerminal()
-    throw 'Skipped: cannot run vim in terminal'
-  endif
+  CheckRunVimInTerminal
   let buf = RunVimInTerminal('', {'rows': 6})
   call term_sendkeys(buf, ":call setline(1, range(1, 100))\n")
 
@@ -203,14 +201,22 @@ func Test_message_more()
   call term_sendkeys(buf, 'q')
   call WaitForAssert({-> assert_equal('100', term_getline(buf, 5))})
 
-  call term_sendkeys(buf, ":q!\n")
+  " Execute a : command from the more prompt
+  call term_sendkeys(buf, ":%p#\n")
+  call term_wait(buf)
+  call WaitForAssert({-> assert_equal('-- More --', term_getline(buf, 6))})
+  call term_sendkeys(buf, ":")
+  call term_wait(buf)
+  call WaitForAssert({-> assert_equal(':', term_getline(buf, 6))})
+  call term_sendkeys(buf, "echo 'Hello'\n")
+  call term_wait(buf)
+  call WaitForAssert({-> assert_equal('Hello ', term_getline(buf, 5))})
+
   call StopVimInTerminal(buf)
 endfunc
 
 func Test_ask_yesno()
-  if !CanRunVimInTerminal()
-    throw 'Skipped: cannot run vim in terminal'
-  endif
+  CheckRunVimInTerminal
   let buf = RunVimInTerminal('', {'rows': 6})
   call term_sendkeys(buf, ":call setline(1, range(1, 2))\n")
 
@@ -233,7 +239,6 @@ func Test_ask_yesno()
   call WaitForAssert({-> assert_equal('y1', term_getline(buf, 1))})
   call WaitForAssert({-> assert_equal('y2', term_getline(buf, 2))})
 
-  call term_sendkeys(buf, ":q!\n")
   call StopVimInTerminal(buf)
 endfunc
 
diff --git a/src/nvim/testdir/test_registers.vim b/src/nvim/testdir/test_registers.vim
index abe28b77cd..52e745438d 100644
--- a/src/nvim/testdir/test_registers.vim
+++ b/src/nvim/testdir/test_registers.vim
@@ -684,6 +684,16 @@ func Test_insert_small_delete()
   bwipe!
 endfunc
 
+" Record in insert mode using CTRL-O
+func Test_record_in_insert_mode()
+  new
+  let @r = ''
+  call setline(1, ['foo'])
+  call feedkeys("i\<C-O>qrbaz\<C-O>q", 'xt')
+  call assert_equal('baz', @r)
+  bwipe!
+endfunc
+
 func Test_record_in_select_mode()
   new
   call setline(1, 'text')
diff --git a/src/nvim/testdir/test_undo.vim b/src/nvim/testdir/test_undo.vim
index da8bf12318..efc39fb3f5 100644
--- a/src/nvim/testdir/test_undo.vim
+++ b/src/nvim/testdir/test_undo.vim
@@ -735,6 +735,20 @@ func Test_undofile_cryptmethod_blowfish2()
   set undofile& undolevels& cryptmethod&
 endfunc
 
+" Test for redoing with incrementing numbered registers
+func Test_redo_repeat_numbered_register()
+  new
+  for [i, v] in [[1, 'one'], [2, 'two'], [3, 'three'],
+        \ [4, 'four'], [5, 'five'], [6, 'six'],
+        \ [7, 'seven'], [8, 'eight'], [9, 'nine']]
+    exe 'let @' .. i .. '="' .. v .. '\n"'
+  endfor
+  call feedkeys('"1p.........', 'xt')
+  call assert_equal(['', 'one', 'two', 'three', 'four', 'five', 'six',
+        \ 'seven', 'eight', 'nine', 'nine'], getline(1, '$'))
+  bwipe!
+endfunc
+
 func Test_undo_mark()
   new
   " The undo is applied to the only line.
-- 
cgit 


From 0cfd4fa8f3dc2241de5f69d5c52510542dfc927c Mon Sep 17 00:00:00 2001
From: zeertzjq <zeertzjq@outlook.com>
Date: Sat, 16 Jul 2022 21:56:47 +0800
Subject: vim-patch:8.2.2643: various code not covered by tests

Problem:    Various code not covered by tests.
Solution:   Add a few more test. (Yegappan Lakshmanan, closes vim/vim#7995)
https://github.com/vim/vim/commit/1f448d906b3c516e5864dc5bae3ddbf3664ee649

Cherry-pick some test_edit.vim changes from patches 8.2.{1022,1432}.
Reorder test_undo.vim to match upstream.
---
 src/nvim/testdir/test_edit.vim      |  39 ++++++++++-
 src/nvim/testdir/test_mapping.vim   |  10 +++
 src/nvim/testdir/test_termcodes.vim |  34 ++++++++++
 src/nvim/testdir/test_undo.vim      | 127 +++++++++++++++++++-----------------
 4 files changed, 147 insertions(+), 63 deletions(-)

(limited to 'src')

diff --git a/src/nvim/testdir/test_edit.vim b/src/nvim/testdir/test_edit.vim
index 65194f49dd..69a34a1c51 100644
--- a/src/nvim/testdir/test_edit.vim
+++ b/src/nvim/testdir/test_edit.vim
@@ -420,16 +420,49 @@ func Test_edit_13()
   call assert_equal("", getline(2))
   call assert_equal("    baz", getline(3))
   set autoindent&
+
+  " pressing <C-U> to erase line should keep the indent with 'autoindent'
+  set backspace=2 autoindent
+  %d
+  exe "normal i\tone\<CR>three\<C-U>two"
+  call assert_equal(["\tone", "\ttwo"], getline(1, '$'))
+  set backspace& autoindent&
+
   bwipe!
 endfunc
 
+" Test for autoindent removing indent when insert mode is stopped.  Some parts
+" of the code is exercised only when interactive mode is used. So use Vim in a
+" terminal.
+func Test_autoindent_remove_indent()
+  CheckRunVimInTerminal
+  let buf = RunVimInTerminal('-N Xfile', {'rows': 6, 'cols' : 20})
+  call TermWait(buf)
+  call term_sendkeys(buf, ":set autoindent\n")
+  " leaving insert mode in a new line with indent added by autoindent, should
+  " remove the indent.
+  call term_sendkeys(buf, "i\<Tab>foo\<CR>\<Esc>")
+  " Need to delay for sometime, otherwise the code in getchar.c will not be
+  " exercised.
+  call TermWait(buf, 50)
+  " when a line is wrapped and the cursor is at the start of the second line,
+  " leaving insert mode, should move the cursor back to the first line.
+  call term_sendkeys(buf, "o" .. repeat('x', 20) .. "\<Esc>")
+  " Need to delay for sometime, otherwise the code in getchar.c will not be
+  " exercised.
+  call TermWait(buf, 50)
+  call term_sendkeys(buf, ":w\n")
+  call TermWait(buf)
+  call StopVimInTerminal(buf)
+  call assert_equal(["\tfoo", '', repeat('x', 20)], readfile('Xfile'))
+  call delete('Xfile')
+endfunc
+
 func Test_edit_CR()
   " Test for <CR> in insert mode
   " basically only in quickfix mode ist tested, the rest
   " has been taken care of by other tests
-  if !has("quickfix")
-    return
-  endif
+  CheckFeature quickfix
   botright new
   call writefile(range(1, 10), 'Xqflist.txt')
   call setqflist([{'filename': 'Xqflist.txt', 'lnum': 2}])
diff --git a/src/nvim/testdir/test_mapping.vim b/src/nvim/testdir/test_mapping.vim
index a34a950526..e1d0b9a9ba 100644
--- a/src/nvim/testdir/test_mapping.vim
+++ b/src/nvim/testdir/test_mapping.vim
@@ -956,6 +956,16 @@ func Test_map_cmdkey_redo()
   ounmap i-
 endfunc
 
+" Test for using <script> with a map to remap characters in rhs
+func Test_script_local_remap()
+  new
+  inoremap <buffer> <SID>xyz mno
+  inoremap <buffer> <script> abc st<SID>xyzre
+  normal iabc
+  call assert_equal('stmnore', getline(1))
+  bwipe!
+endfunc
+
 func Test_abbreviate_multi_byte()
   new
   iabbrev foo bar
diff --git a/src/nvim/testdir/test_termcodes.vim b/src/nvim/testdir/test_termcodes.vim
index f3b10a922e..c0712aa892 100644
--- a/src/nvim/testdir/test_termcodes.vim
+++ b/src/nvim/testdir/test_termcodes.vim
@@ -1,4 +1,38 @@
 
+" Test for terminal keycodes that doesn't have termcap entries
+func Test_special_term_keycodes()
+  new
+  " Test for <xHome>, <S-xHome> and <C-xHome>
+  " send <K_SPECIAL> <KS_EXTRA> keycode
+  call feedkeys("i\<C-K>\x80\xfd\x3f\n", 'xt')
+  " send <K_SPECIAL> <KS_MODIFIER> bitmap <K_SPECIAL> <KS_EXTRA> keycode
+  call feedkeys("i\<C-K>\x80\xfc\x2\x80\xfd\x3f\n", 'xt')
+  call feedkeys("i\<C-K>\x80\xfc\x4\x80\xfd\x3f\n", 'xt')
+  " Test for <xEnd>, <S-xEnd> and <C-xEnd>
+  call feedkeys("i\<C-K>\x80\xfd\x3d\n", 'xt')
+  call feedkeys("i\<C-K>\x80\xfc\x2\x80\xfd\x3d\n", 'xt')
+  call feedkeys("i\<C-K>\x80\xfc\x4\x80\xfd\x3d\n", 'xt')
+  " Test for <zHome>, <S-zHome> and <C-zHome>
+  call feedkeys("i\<C-K>\x80\xfd\x40\n", 'xt')
+  call feedkeys("i\<C-K>\x80\xfc\x2\x80\xfd\x40\n", 'xt')
+  call feedkeys("i\<C-K>\x80\xfc\x4\x80\xfd\x40\n", 'xt')
+  " Test for <zEnd>, <S-zEnd> and <C-zEnd>
+  call feedkeys("i\<C-K>\x80\xfd\x3e\n", 'xt')
+  call feedkeys("i\<C-K>\x80\xfc\x2\x80\xfd\x3e\n", 'xt')
+  call feedkeys("i\<C-K>\x80\xfc\x4\x80\xfd\x3e\n", 'xt')
+  " Test for <xUp>, <xDown>, <xLeft> and <xRight>
+  call feedkeys("i\<C-K>\x80\xfd\x41\n", 'xt')
+  call feedkeys("i\<C-K>\x80\xfd\x42\n", 'xt')
+  call feedkeys("i\<C-K>\x80\xfd\x43\n", 'xt')
+  call feedkeys("i\<C-K>\x80\xfd\x44\n", 'xt')
+  call assert_equal(['<Home>', '<S-Home>', '<C-Home>',
+        \ '<End>', '<S-End>', '<C-End>',
+        \ '<Home>', '<S-Home>', '<C-Home>',
+        \ '<End>', '<S-End>', '<C-End>',
+        \ '<Up>', '<Down>', '<Left>', '<Right>', ''], getline(1, '$'))
+  bw!
+endfunc
+
 func Test_simplify_ctrl_at()
   " feeding unsimplified CTRL-@ should still trigger i_CTRL-@
   call feedkeys("ifoo\<Esc>A\<*C-@>x", 'xt')
diff --git a/src/nvim/testdir/test_undo.vim b/src/nvim/testdir/test_undo.vim
index efc39fb3f5..a9ec405aa4 100644
--- a/src/nvim/testdir/test_undo.vim
+++ b/src/nvim/testdir/test_undo.vim
@@ -3,8 +3,6 @@
 " undo-able pieces.  Do that by setting 'undolevels'.
 " Also tests :earlier and :later.
 
-source check.vim
-
 func Test_undotree()
   new
 
@@ -137,8 +135,7 @@ func BackOne(expected)
 endfunc
 
 func Test_undo_del_chars()
-  CheckFunction test_settime
-
+  throw 'Skipped: Nvim does not support test_settime()'
   " Setup a buffer without creating undo entries
   new
   set ul=-1
@@ -334,8 +331,9 @@ func Test_insert_expr()
 endfunc
 
 func Test_undofile_earlier()
-  CheckFunction test_settime
-
+  throw 'Skipped: Nvim does not support test_settime()'
+  " Issue #1254
+  " create undofile with timestamps older than Vim startup time.
   let t0 = localtime() - 43200
   call test_settime(t0)
   new Xfile
@@ -368,7 +366,7 @@ func Test_wundo_errors()
   bwipe!
 endfunc
 
-" Check that reading a truncted undo file doesn't hang.
+" Check that reading a truncated undo file doesn't hang.
 func Test_undofile_truncated()
   new
   call setline(1, 'hello')
@@ -431,6 +429,59 @@ func Test_cmd_in_reg_undo()
   let @a = ''
 endfunc
 
+" This used to cause an illegal memory access
+func Test_undo_append()
+  new
+  call feedkeys("axx\<Esc>v", 'xt')
+  undo
+  norm o
+  quit
+endfunc
+
+func Test_undo_0()
+  new
+  set ul=100
+  normal i1
+  undo
+  normal i2
+  undo
+  normal i3
+
+  undo 0
+  let d = undotree()
+  call assert_equal('', getline(1))
+  call assert_equal(0, d.seq_cur)
+
+  redo
+  let d = undotree()
+  call assert_equal('3', getline(1))
+  call assert_equal(3, d.seq_cur)
+
+  undo 2
+  undo 0
+  let d = undotree()
+  call assert_equal('', getline(1))
+  call assert_equal(0, d.seq_cur)
+
+  redo
+  let d = undotree()
+  call assert_equal('2', getline(1))
+  call assert_equal(2, d.seq_cur)
+
+  undo 1
+  undo 0
+  let d = undotree()
+  call assert_equal('', getline(1))
+  call assert_equal(0, d.seq_cur)
+
+  redo
+  let d = undotree()
+  call assert_equal('1', getline(1))
+  call assert_equal(1, d.seq_cur)
+
+  bwipe!
+endfunc
+
 " undo or redo are noop if there is nothing to undo or redo
 func Test_undo_redo_noop()
   new
@@ -456,15 +507,6 @@ func Test_redo_empty_line()
   bwipe!
 endfunc
 
-" This used to cause an illegal memory access
-func Test_undo_append()
-  new
-  call feedkeys("axx\<Esc>v", 'xt')
-  undo
-  norm o
-  quit
-endfunc
-
 funct Test_undofile()
   " Test undofile() without setting 'undodir'.
   if has('persistent_undo')
@@ -506,50 +548,6 @@ funct Test_undofile()
   set undodir&
 endfunc
 
-func Test_undo_0()
-  new
-  set ul=100
-  normal i1
-  undo
-  normal i2
-  undo
-  normal i3
-
-  undo 0
-  let d = undotree()
-  call assert_equal('', getline(1))
-  call assert_equal(0, d.seq_cur)
-
-  redo
-  let d = undotree()
-  call assert_equal('3', getline(1))
-  call assert_equal(3, d.seq_cur)
-
-  undo 2
-  undo 0
-  let d = undotree()
-  call assert_equal('', getline(1))
-  call assert_equal(0, d.seq_cur)
-
-  redo
-  let d = undotree()
-  call assert_equal('2', getline(1))
-  call assert_equal(2, d.seq_cur)
-
-  undo 1
-  undo 0
-  let d = undotree()
-  call assert_equal('', getline(1))
-  call assert_equal(0, d.seq_cur)
-
-  redo
-  let d = undotree()
-  call assert_equal('1', getline(1))
-  call assert_equal(1, d.seq_cur)
-
-  bwipe!
-endfunc
-
 " Tests for the undo file
 " Explicitly break changes up in undo-able pieces by setting 'undolevels'.
 func Test_undofile_2()
@@ -749,6 +747,15 @@ func Test_redo_repeat_numbered_register()
   bwipe!
 endfunc
 
+" Test for redo in insert mode using CTRL-O with multibyte characters
+func Test_redo_multibyte_in_insert_mode()
+  new
+  call feedkeys("a\<C-K>ft", 'xt')
+  call feedkeys("uiHe\<C-O>.llo", 'xt')
+  call assert_equal("He\ufb05llo", getline(1))
+  bwipe!
+endfunc
+
 func Test_undo_mark()
   new
   " The undo is applied to the only line.
-- 
cgit