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.

5 files changed, 173 insertions, 63 deletions

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.
diff --git a/test/functional/legacy/edit_spec.lua b/test/functional/legacy/edit_spec.lua
new file mode 100644
index 0000000000..7fc5f11a79
--- /dev/null
+++ b/test/functional/legacy/edit_spec.lua
@@ -0,0 +1,26 @@
+local helpers = require('test.functional.helpers')(after_each)
+local clear = helpers.clear
+local command = helpers.command
+local expect = helpers.expect
+local feed = helpers.feed
+local sleep = helpers.sleep
+
+before_each(clear)
+
+-- oldtest: Test_autoindent_remove_indent()
+it('autoindent removes indent when Insert mode is stopped', function()
+  command('set autoindent')
+  -- leaving insert mode in a new line with indent added by autoindent, should
+  -- remove the indent.
+  feed('i<Tab>foo<CR><Esc>')
+  -- Need to delay for sometime, otherwise the code in getchar.c will not be
+  -- exercised.
+  sleep(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.
+  feed('o' .. ('x'):rep(20) .. '<Esc>')
+  -- Need to delay for sometime, otherwise the code in getchar.c will not be
+  -- exercised.
+  sleep(50)
+  expect('\tfoo\n\n' .. ('x'):rep(20))
+end)