patch 8.1.2206: no test for fixed issue #3893
Problem: No test for fixed issue #3893.
Solution: Add a test. (Christian Brabandt, #3893)
diff --git a/src/testdir/test_display.vim b/src/testdir/test_display.vim
index f500dc7..a25d2cf 100644
--- a/src/testdir/test_display.vim
+++ b/src/testdir/test_display.vim
@@ -158,3 +158,26 @@
set list& listchars& wrap&
bw!
endfunc
+
+" Check that win_lines() works correctly with the number_only parameter=TRUE
+" should break early to optimize cost of drawing, but needs to make sure
+" that the number column is correctly highlighted.
+func Test_scroll_CursorLineNr_update()
+ CheckScreendump
+
+ let lines =<< trim END
+ hi CursorLineNr ctermfg=73 ctermbg=236
+ set nu rnu cursorline cursorlineopt=number
+ exe ":norm! o\<esc>110ia\<esc>"
+ END
+ let filename = 'Xdrawscreen'
+ call writefile(lines, filename)
+ let buf = RunVimInTerminal('-S '.filename, #{rows: 5, cols: 50})
+ call term_sendkeys(buf, "k")
+ call term_wait(buf)
+ call VerifyScreenDump(buf, 'Test_winline_rnu', {})
+
+ " clean up
+ call StopVimInTerminal(buf)
+ call delete(filename)
+endfunc