From 127969cf98000a760826ca3a0f3781a8b79522f1 Mon Sep 17 00:00:00 2001
From: Bram Moolenaar <Bram@vim.org>
Date: Sun, 6 Mar 2022 19:54:13 +0000
Subject: patch 8.2.4520: using wrong highlight for cursor line number

Problem:    Using wrong highlight for cursor line number.
Solution:   Take filler lines into account when using CursorLineNr.
            (closes #9897)
---
 src/testdir/test_diffmode.vim | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

(limited to 'src/testdir/test_diffmode.vim')

diff --git a/src/testdir/test_diffmode.vim b/src/testdir/test_diffmode.vim
index c626023b4..a632b19bc 100644
--- a/src/testdir/test_diffmode.vim
+++ b/src/testdir/test_diffmode.vim
@@ -1056,6 +1056,32 @@ func Test_diff_with_cursorline()
   call delete('Xtest_diff_cursorline')
 endfunc
 
+func Test_diff_with_cursorline_number()
+  CheckScreendump
+
+  let lines =<< trim END
+      hi CursorLine ctermbg=red ctermfg=white
+      hi CursorLineNr ctermbg=white ctermfg=black cterm=underline
+      set cursorline number
+      call setline(1, ["baz", "foo", "foo", "bar"])
+      2
+      vnew
+      call setline(1, ["foo", "foo", "bar"])
+      windo diffthis
+      1wincmd w
+  END
+  call writefile(lines, 'Xtest_diff_cursorline_number')
+  let buf = RunVimInTerminal('-S Xtest_diff_cursorline_number', {})
+
+  call VerifyScreenDump(buf, 'Test_diff_with_cursorline_number_01', {})
+  call term_sendkeys(buf, ":set cursorlineopt=number\r")
+  call VerifyScreenDump(buf, 'Test_diff_with_cursorline_number_02', {})
+
+  " clean up
+  call StopVimInTerminal(buf)
+  call delete('Xtest_diff_cursorline_number')
+endfunc
+
 func Test_diff_with_cursorline_breakindent()
   CheckScreendump
 
-- 
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