Add screen redraw regression tests.

regress/screen-redraw-bidi.sh

@@ -0,0 +1,79 @@
+#!/bin/sh
+
+# Exercise screen-redraw.c bidirectional-isolate handling. When the client is
+# UTF-8 and its terminal has the Bidi capability, each drawn span is wrapped in
+# directional isolate characters (U+2066 .. U+2069) so a bidi terminal does not
+# reorder pane contents across borders (the REDRAW_ISOLATES path).
+#
+# The Bidi capability is added with terminal-overrides before the client
+# attaches, so the attached client picks it up. The isolate characters appear in
+# the captured output around each span.
+#
+# Run with GENERATE=1 to (re)create the golden files.
+
+PATH=/bin:/usr/bin
+TERM=screen
+LC_ALL=C.UTF-8
+export TERM LC_ALL
+
+[ -z "$TEST_TMUX" ] && TEST_TMUX=$(readlink -f ../tmux)
+TMUX="$TEST_TMUX -Ltest -f/dev/null"
+TMUX2="$TEST_TMUX -Ltest2 -f/dev/null"
+RESULTS=screen-redraw-results
+
+TMP=$(mktemp)
+trap "rm -f $TMP; $TMUX kill-server 2>/dev/null; $TMUX2 kill-server 2>/dev/null" \
+	0 1 15
+
+fail() {
+	echo "$*" >&2
+	exit 1
+}
+
+compare() {
+	sleep 1
+	$TMUX capturep -p >$TMP || exit 1
+	if [ -n "$GENERATE" ]; then
+		cp $TMP "$RESULTS/$1.result" || exit 1
+		echo "generated $1"
+	else
+		cmp -s $TMP "$RESULTS/$1.result" || \
+			fail "scene $1 differs from $RESULTS/$1.result"
+	fi
+}
+
+new_scene() {
+	$TMUX2 neww -d "sh -c 'exec sleep 100'" || exit 1
+	$TMUX2 selectw -t:\$ || exit 1
+	$TMUX2 resizew -x40 -y12 || exit 1
+}
+
+C="sh -c 'exec sleep 100'"
+
+$TMUX kill-server 2>/dev/null
+$TMUX2 kill-server 2>/dev/null
+
+$TMUX2 new -d -x40 -y12 "sh -c 'exec sleep 100'" || exit 1
+$TMUX2 set -g status off || exit 1
+$TMUX2 set -g window-size manual || exit 1
+# Add the Bidi capability before the client attaches.
+$TMUX2 set -ag terminal-overrides ",*:Bidi=\\E[8h" || exit 1
+
+$TMUX new -d -x40 -y12 || exit 1
+$TMUX set -g status off || exit 1
+$TMUX set -g window-size manual || exit 1
+$TMUX set -g default-terminal "tmux-256color" || exit 1
+$TMUX send -l "$TMUX2 attach" || exit 1
+$TMUX send Enter || exit 1
+sleep 1
+
+# Single pane: content is wrapped in isolates.
+new_scene
+compare bidi-single
+
+# Two panes: borders and both panes are isolated.
+new_scene
+$TMUX2 splitw -h "$C" || exit 1
+compare bidi-split
+
+exit 0