vim-patch:9.0.0532: edit test is flaky when run under valgrind (#32518)

Problem:    Edit test is flaky when run under valgrind.
Solution:   Send some text to the terminal to trigger a redraw.

14f91765c0

Cherry-pick Test_edit_shift_bs() from patch 8.2.4876.

Co-authored-by: Bram Moolenaar <Bram@vim.org>

test/old/testdir/test_edit.vim

@@ -472,7 +472,7 @@ func Test_edit_CR()
   " has been taken care of by other tests
   CheckFeature quickfix
   botright new
-  call writefile(range(1, 10), 'Xqflist.txt')
+  call writefile(range(1, 10), 'Xqflist.txt', 'D')
   call setqflist([{'filename': 'Xqflist.txt', 'lnum': 2}])
   copen
   set modifiable
@@ -492,16 +492,15 @@ func Test_edit_CR()
   call feedkeys("A\n", 'tnix')
   call feedkeys("A\r", 'tnix')
   call assert_equal(map(range(1, 10), 'string(v:val)') + ['', '', '', ''], getline(1, '$'))
+
   bw!
   lclose
-  call delete('Xqflist.txt')
 endfunc
 
 func Test_edit_CTRL_()
+  CheckFeature rightleft
   " disabled for Windows builds, why?
-  if !has("rightleft") || has("win32")
-    return
-  endif
+  CheckNotMSWindows
   let _encoding=&encoding
   set encoding=utf-8
   " Test for CTRL-_
@@ -592,7 +591,7 @@ func Test_edit_CTRL_I()
   call feedkeys("Arunt\<c-x>\<c-f>\<tab>\<cr>\<esc>", 'tnix')
   call assert_match('runtest\.vim', getline(1))
   %d
-  call writefile(['one', 'two', 'three'], 'Xinclude.txt')
+  call writefile(['one', 'two', 'three'], 'Xinclude.txt', 'D')
   let include='#include Xinclude.txt'
   call setline(1, [include, ''])
   call cursor(2, 1)
@@ -604,14 +603,13 @@ func Test_edit_CTRL_I()
   call assert_equal([include, 'three', ''], getline(1, '$'))
   call feedkeys("2ggC\<c-x>\<tab>\<down>\<down>\<down>\<cr>\<esc>", 'tnix')
   call assert_equal([include, '', ''], getline(1, '$'))
-  call delete("Xinclude.txt")
   bw!
 endfunc
 
 func Test_edit_CTRL_K()
   " Test pressing CTRL-K (basically only dictionary completion and digraphs
   " the rest is already covered
-  call writefile(['A', 'AA', 'AAA', 'AAAA'], 'Xdictionary.txt')
+  call writefile(['A', 'AA', 'AAA', 'AAAA'], 'Xdictionary.txt', 'D')
   set dictionary=Xdictionary.txt
   new
   call setline(1, 'A')
@@ -667,7 +665,6 @@ func Test_edit_CTRL_K()
     " error sleeps 2 seconds, when v:testing is not set
     let v:testing = 0
   endtry
-  call delete('Xdictionary.txt')
 
   if exists('*test_override')
     call test_override("char_avail", 1)
@@ -867,7 +864,7 @@ func Test_edit_CTRL_T()
   call assert_equal(["\<tab>abcxyz"], getline(1, '$'))
   set nopaste
   " CTRL-X CTRL-T (thesaurus complete)
-  call writefile(['angry furious mad enraged'], 'Xthesaurus')
+  call writefile(['angry furious mad enraged'], 'Xthesaurus', 'D')
   set thesaurus=Xthesaurus
   call setline(1, 'mad')
   call cursor(1, 1)
@@ -924,13 +921,12 @@ func Test_edit_CTRL_T()
     let v:testing = 0
   endtry
   call assert_equal(['mad'], getline(1, '$'))
-  call delete('Xthesaurus')
   bw!
 endfunc
 
 " Test thesaurus completion with different encodings
 func Test_thesaurus_complete_with_encoding()
-  call writefile(['angry furious mad enraged'], 'Xthesaurus')
+  call writefile(['angry furious mad enraged'], 'Xthesaurus', 'D')
   set thesaurus=Xthesaurus
   " for e in ['latin1', 'utf-8']
   for e in ['utf-8']
@@ -943,7 +939,6 @@ func Test_thesaurus_complete_with_encoding()
     bw!
   endfor
   set thesaurus=
-  call delete('Xthesaurus')
 endfunc
 
 " Test 'thesaurusfunc'
@@ -1524,7 +1519,7 @@ func Test_edit_complete_very_long_name()
   let dirname = getcwd() . "/Xlongdir"
   let longdirname = dirname . repeat('/' . repeat('d', 255), 4)
   try
-    call mkdir(longdirname, 'p')
+    call mkdir(longdirname, 'pR')
   catch /E739:/
     " Long directory name probably not supported.
     call delete(dirname, 'rf')
@@ -1564,7 +1559,6 @@ func Test_edit_complete_very_long_name()
 
   bwipe!
   exe 'bwipe! ' . longfilename
-  call delete(dirname, 'rf')
   let &columns = save_columns
   if winposx >= 0 && winposy >= 0
     exe 'winpos ' . winposx . ' ' . winposy
@@ -1783,19 +1777,18 @@ endfunc
 " Test for editing a file using invalid file encoding
 func Test_edit_invalid_encoding()
   CheckEnglish
-  call writefile([], 'Xinvfile')
+  call writefile([], 'Xinvfile', 'D')
   redir => msg
   new ++enc=axbyc Xinvfile
   redir END
   call assert_match('\[NOT converted\]', msg)
-  call delete('Xinvfile')
   close!
 endfunc
 
 " Test for the "charconvert" option
 func Test_edit_charconvert()
   CheckEnglish
-  call writefile(['one', 'two'], 'Xccfile')
+  call writefile(['one', 'two'], 'Xccfile', 'D')
 
   " set 'charconvert' to a non-existing function
   set charconvert=NonExitingFunc()
@@ -1855,8 +1848,6 @@ func Test_edit_charconvert()
   close!
   delfunc Cconv3
   set charconvert&
-
-  call delete('Xccfile')
 endfunc
 
 " Test for editing a file without read permission
@@ -1864,7 +1855,7 @@ func Test_edit_file_no_read_perm()
   CheckUnix
   CheckNotRoot
 
-  call writefile(['one', 'two'], 'Xnrpfile')
+  call writefile(['one', 'two'], 'Xnrpfile', 'D')
   call setfperm('Xnrpfile', '-w-------')
   new
   redir => msg
@@ -1874,7 +1865,6 @@ func Test_edit_file_no_read_perm()
   call assert_equal([''], getline(1, '$'))
   call assert_match('\[Permission Denied\]', msg)
   close!
-  call delete('Xnrpfile')
 endfunc
 
 " Using :edit without leaving 'insertmode' should not cause Insert mode to be
@@ -1886,19 +1876,24 @@ func Test_edit_insertmode_ex_edit()
     set insertmode noruler
     inoremap <C-B> <Cmd>edit Xfoo<CR>
   END
-  call writefile(lines, 'Xtest_edit_insertmode_ex_edit')
+  call writefile(lines, 'Xtest_edit_insertmode_ex_edit', 'D')
 
-  let buf = RunVimInTerminal('-S Xtest_edit_insertmode_ex_edit', #{rows: 6})
-  " Somehow this can be very slow with valgrind. A separate TermWait() works
-  " better than a longer time with WaitForAssert() (why?)
-  call TermWait(buf, 1000)
+  let buf = RunVimInTerminal('-S Xtest_edit_insertmode_ex_edit', #{rows: 6, wait_for_ruler: 0})
+  " Somehow when using valgrind "INSERT" does not show up unless we send
+  " something to the terminal.
+  for i in range(30)
+    if term_getline(buf, 6) =~ 'INSERT'
+      break
+    endif
+    call term_sendkeys(buf, "-")
+    sleep 100m
+  endfor
   call WaitForAssert({-> assert_match('^-- INSERT --\s*$', term_getline(buf, 6))})
   call term_sendkeys(buf, "\<C-B>\<C-L>")
   call WaitForAssert({-> assert_notmatch('^-- INSERT --\s*$', term_getline(buf, 6))})
 
   " clean up
   call StopVimInTerminal(buf)
-  call delete('Xtest_edit_insertmode_ex_edit')
 endfunc
 
 " Pressing escape in 'insertmode' should beep
@@ -2124,6 +2119,32 @@ func Test_edit_overlong_file_name()
   bwipe!
 endfunc
 
+func Test_edit_shift_bs()
+  CheckMSWindows
+
+  " FIXME: this works interactively, but the test fails
+  throw 'Skipped: Shift-Backspace Test not working correctly :('
+
+  " Need to run this in Win32 Terminal, do not use CheckRunVimInTerminal
+  if !has("terminal")
+    return
+  endif
+
+  " Shift Backspace should work like Backspace in insert mode
+  let lines =<< trim END
+    call setline(1, ['abc'])
+  END
+  call writefile(lines, 'Xtest_edit_shift_bs', 'D')
+
+  let buf = RunVimInTerminal('-S Xtest_edit_shift_bs', #{rows: 3})
+  call term_sendkeys(buf, "A\<S-BS>-\<esc>")
+  call TermWait(buf, 50)
+  call assert_equal('ab-', term_getline(buf, 1))
+
+  " clean up
+  call StopVimInTerminal(buf)
+endfunc
+
 func Test_edit_Ctrl_RSB()
   new
   let g:triggered = []