From af943994738b0cedf107a3455441b738c11df39d Mon Sep 17 00:00:00 2001
From: Nicholas Marriott <nicholas.marriott@gmail.com>
Date: Fri, 19 Jun 2026 11:50:29 +0100
Subject: [PATCH] Add some more bits to test.

---
 regress/tty-draw-line.sh | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/regress/tty-draw-line.sh b/regress/tty-draw-line.sh
index 0352c33a..b57de08c 100644
--- a/regress/tty-draw-line.sh
+++ b/regress/tty-draw-line.sh
@@ -77,6 +77,10 @@ $TMUX2 neww -d \
 	"printf 'abcdefghijklmnopqrst\r\033[KXYZ\nnext'; exec sleep 100" || exit 1
 $TMUX2 neww -d \
 	"printf 'ab\tcdefghijklmnopqrstuvwxyz'; printf '\033[H'; exec sleep 100" || exit 1
+$TMUX2 neww -d \
+	"printf '\033(0x\033(B'; exec sleep 100" || exit 1
+$TMUX2 neww -d \
+	"awk 'BEGIN { for (i = 0; i < 1100; i++) printf \"a\" }'; exec sleep 100" || exit 1
 $TMUX2 selectw -t:0 || exit 1
 
 $TMUX -f/dev/null new -d -x20 -y6 || exit 1
@@ -225,4 +229,20 @@ captureen
 sed -n 1p $TMP | grep -q "$esc" || \
 	fail "selected short-line tail did not draw attributes"
 
+# ACS/charset cells should be redrawn correctly.
+$TMUX resizew -x20 -y6 || exit 1
+$TMUX2 selectw -t:11 || exit 1
+sleep 1
+capture
+check_line 1 "│"
+
+# A long run with the same attributes should flush the internal draw buffer.
+$TMUX resizew -x1100 -y6 || exit 1
+$TMUX2 resizew -t:12 -x1100 -y6 || exit 1
+$TMUX2 selectw -t:12 || exit 1
+sleep 1
+capture
+len=$(sed -n 1p $TMP | wc -c)
+[ "$len" -ge 1100 ] || fail "long same-style line was truncated"
+
 exit 0