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.

1 files changed, 36 insertions, 3 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}])