vim-patch:9.0.0964: status line not redrawn when 'splitkeep' is "screen"

Problem:    Status line of other window not redrawn when dragging it when
            'splitkeep' is set to "screen".
Solution:   Set w_redr_status earlier. (Luuk van Baal, closes vim/vim#11635,
            closes vim/vim#11632)

74a694dbe2

Co-authored-by: Luuk van Baal <luukvbaal@gmail.com>

src/nvim/testdir/test_window_cmd.vim

@@ -1793,4 +1793,22 @@ function Test_splitkeep_fold()
   call VerifyScreenDump(buf, 'Test_splitkeep_fold_4', {})
 endfunction
 
+function Test_splitkeep_status()
+  CheckScreendump
+
+  let lines =<< trim END
+    call setline(1, ['a', 'b', 'c'])
+    set nomodified
+    set splitkeep=screen
+    let win = winnr()
+    wincmd s
+    wincmd j
+  END
+  call writefile(lines, 'XTestSplitkeepStatus', 'D')
+  let buf = RunVimInTerminal('-S XTestSplitkeepStatus', #{rows: 10})
+
+  call term_sendkeys(buf, ":call win_move_statusline(win, 1)\<CR>")
+  call VerifyScreenDump(buf, 'Test_splitkeep_status_1', {})
+endfunction
+
 " vim: shiftwidth=2 sts=2 expandtab

test/functional/legacy/window_cmd_spec.lua

@@ -6,9 +6,11 @@ local exec_lua = helpers.exec_lua
 local feed = helpers.feed
 
 describe('splitkeep', function()
-  local screen = Screen.new()
+  local screen
+
   before_each(function()
     clear('--cmd', 'set splitkeep=screen')
+    screen = Screen.new()
     screen:attach()
   end)
 
@@ -193,4 +195,33 @@ describe('splitkeep', function()
       :quit                                                |
     ]])
   end)
+
+  -- oldtest: Test_splitkeep_status()
+  it('does not scroll when split in callback', function()
+    exec([[
+      call setline(1, ['a', 'b', 'c'])
+      set nomodified
+      set splitkeep=screen
+      let win = winnr()
+      wincmd s
+      wincmd j
+    ]])
+    feed(':call win_move_statusline(win, 1)<CR>')
+    screen:expect([[
+      a                                                    |
+      b                                                    |
+      c                                                    |
+      ~                                                    |
+      ~                                                    |
+      ~                                                    |
+      ~                                                    |
+      [No Name]                                            |
+      ^a                                                    |
+      b                                                    |
+      c                                                    |
+      ~                                                    |
+      [No Name]                                            |
+                                                           |
+    ]])
+  end)
 end)