vim-patch:8.2.4630: 'cursorline' not always updated with 'culopt' is "screenline"

Problem:    'cursorline' not always updated with 'cursorlineopt' is
            "screenline".
Solution:   Call check_redraw_cursorline() more often. (closes vim/vim#10013)
bf269ed0b0

Code was reverted in patch 8.2.4638, so this just ports the test.

src/nvim/testdir/test_cursorline.vim

@@ -293,5 +293,26 @@ func Test_cursorline_callback()
   call delete('Xcul_timer')
 endfunc
 
+func Test_cursorline_screenline_update()
+  CheckScreendump
+
+  let lines =<< trim END
+      call setline(1, repeat('xyz ', 30))
+      set cursorline cursorlineopt=screenline
+      inoremap <F2> <Cmd>call cursor(1, 1)<CR>
+  END
+  call writefile(lines, 'Xcul_screenline')
+
+  let buf = RunVimInTerminal('-S Xcul_screenline', #{rows: 8})
+  call term_sendkeys(buf, "A")
+  call VerifyScreenDump(buf, 'Test_cursorline_screenline_1', {})
+  call term_sendkeys(buf, "\<F2>")
+  call VerifyScreenDump(buf, 'Test_cursorline_screenline_2', {})
+  call term_sendkeys(buf, "\<Esc>")
+
+  call StopVimInTerminal(buf)
+  call delete('Xcul_screenline')
+endfunc
+
 
 " vim: shiftwidth=2 sts=2 expandtab

test/functional/ui/highlight_spec.lua

@@ -937,17 +937,18 @@ describe('CursorLine and CursorLineNr highlights', function()
       [2] = {foreground = Screen.colors.Yellow};
       [3] = {foreground = Screen.colors.Red, background = Screen.colors.Green};
       [4] = {foreground = Screen.colors.Green, background = Screen.colors.Red};
+      [5] = {bold = true},  -- ModeMsg
     })
     screen:attach()
 
-    feed_command('set wrap cursorline cursorlineopt=screenline')
-    feed_command('set showbreak=>>>')
-    feed_command('highlight clear NonText')
-    feed_command('highlight clear CursorLine')
-    feed_command('highlight NonText guifg=Yellow gui=NONE')
-    feed_command('highlight LineNr guifg=Red guibg=Green gui=NONE')
-    feed_command('highlight CursorLine guifg=Black guibg=White gui=NONE')
-    feed_command('highlight CursorLineNr guifg=Green guibg=Red gui=NONE')
+    command('set wrap cursorline cursorlineopt=screenline')
+    command('set showbreak=>>>')
+    command('highlight clear NonText')
+    command('highlight clear CursorLine')
+    command('highlight NonText guifg=Yellow gui=NONE')
+    command('highlight LineNr guifg=Red guibg=Green gui=NONE')
+    command('highlight CursorLine guifg=Black guibg=White gui=NONE')
+    command('highlight CursorLineNr guifg=Green guibg=Red gui=NONE')
 
     feed('30iø<esc>o<esc>30ia<esc>')
 
@@ -977,7 +978,7 @@ describe('CursorLine and CursorLineNr highlights', function()
     ]])
 
     -- CursorLineNr should not apply to line number when 'cursorlineopt' does not contain "number"
-    feed_command('set relativenumber numberwidth=2')
+    command('set relativenumber numberwidth=2')
     screen:expect([[
       {3:0 }{1:øøøøøøøøøøøø^øøøøøø}|
       {3:  }{2:>>>}øøøøøøøøøøøø   |
@@ -987,7 +988,7 @@ describe('CursorLine and CursorLineNr highlights', function()
     ]])
 
     -- CursorLineNr should apply to line number when 'cursorlineopt' contains "number"
-    feed_command('set cursorlineopt+=number')
+    command('set cursorlineopt+=number')
     screen:expect([[
       {4:0 }{1:øøøøøøøøøøøø^øøøøøø}|
       {3:  }{2:>>>}øøøøøøøøøøøø   |
@@ -1019,6 +1020,44 @@ describe('CursorLine and CursorLineNr highlights', function()
       {3:  }{2:>>>}{1:aaaaaaaaa^aaa   }|
                           |
     ]])
+
+    -- updated in Insert mode
+    feed('I')
+    screen:expect([[
+      {3:1 }øøøøøøøøøøøøøøøøøø|
+      {3:  }{2:>>>}øøøøøøøøøøøø   |
+      {4:0 }{1:^aaaaaaaaaaaaaaaaaa}|
+      {3:  }{2:>>>}aaaaaaaaaaaa   |
+      {5:-- INSERT --}        |
+    ]])
+
+    feed('<Esc>gg')
+    screen:expect([[
+      {4:0 }{1:^øøøøøøøøøøøøøøøøøø}|
+      {3:  }{2:>>>}øøøøøøøøøøøø   |
+      {3:1 }aaaaaaaaaaaaaaaaaa|
+      {3:  }{2:>>>}aaaaaaaaaaaa   |
+                          |
+    ]])
+
+    command('inoremap <F2> <Cmd>call cursor(1, 1)<CR>')
+    feed('A')
+    screen:expect([[
+      {4:0 }øøøøøøøøøøøøøøøøøø|
+      {3:  }{2:>>>}{1:øøøøøøøøøøøø^   }|
+      {3:1 }aaaaaaaaaaaaaaaaaa|
+      {3:  }{2:>>>}aaaaaaaaaaaa   |
+      {5:-- INSERT --}        |
+    ]])
+
+    feed('<F2>')
+    screen:expect([[
+      {4:0 }{1:^øøøøøøøøøøøøøøøøøø}|
+      {3:  }{2:>>>}øøøøøøøøøøøø   |
+      {3:1 }aaaaaaaaaaaaaaaaaa|
+      {3:  }{2:>>>}aaaaaaaaaaaa   |
+      {5:-- INSERT --}        |
+    ]])
   end)
 
   it('always updated. vim-patch:8.1.0849', function()