Tests for 5641.

(cherry picked from commit 2d7148b3fa)

regress/floating-pane-covers-tiled-pane.sh

@@ -0,0 +1,137 @@
+#!/bin/sh
+
+# A floating pane that is larger than a tiled pane on every side (so none of
+# its edges fall inside the tiled pane) must still hide that pane: output from
+# the covered pane must not be drawn over the floating pane.
+
+PATH=/bin:/usr/bin
+TERM=screen
+LC_ALL=C.UTF-8
+export PATH TERM LC_ALL
+
+[ -z "$TEST_TMUX" ] && TEST_TMUX=$(readlink -f ../tmux)
+
+DIR=$(mktemp -d) || exit 1
+INNER="$TEST_TMUX -Lcovers-inner-$$ -f/dev/null"
+OUTER="$TEST_TMUX -Lcovers-outer-$$ -f/dev/null"
+EMITTER=$DIR/emitter.pl
+FILLER=$DIR/filler.pl
+TRIGGER=$DIR/trigger
+CAPTURE=$DIR/capture
+
+fail()
+{
+	echo "$*" >&2
+	[ -s "$CAPTURE" ] && cat "$CAPTURE" >&2
+	exit 1
+}
+
+cleanup()
+{
+	$OUTER kill-server 2>/dev/null
+	$INNER kill-server 2>/dev/null
+	rm -rf "$DIR"
+}
+trap cleanup 0 1 15
+
+wait_outer_has()
+{
+	marker=$1
+	i=0
+	while [ "$i" -lt 50 ]; do
+		$OUTER capture-pane -p -t outer:0.0 >"$CAPTURE" 2>/dev/null || true
+		grep -q "$marker" "$CAPTURE" && return 0
+		sleep 0.1
+		i=$((i + 1))
+	done
+	fail "outer client did not show $marker"
+}
+
+wait_inner_has()
+{
+	marker=$1
+	i=0
+	while [ "$i" -lt 50 ]; do
+		$INNER capture-pane -p -t "$2" 2>/dev/null |
+		    grep -q "$marker" && return 0
+		sleep 0.1
+		i=$((i + 1))
+	done
+	fail "inner pane $2 did not contain $marker"
+}
+
+# Covered pane: waits for the trigger, then scrolls a small region.
+cat >"$EMITTER" <<'PERL'
+use strict;
+use warnings;
+
+$| = 1;
+while (!-e $ENV{TRIGGER}) {
+	select undef, undef, undef, 0.01;
+}
+# Scroll a small region: this is redrawn row by row rather than by a large
+# region redraw, so it must not draw over the floating pane.
+print "\e[1;2r\e[2;1HCOVEREDCOVERED\n";
+sleep 100;
+PERL
+
+# Floating pane: fill it so any overwriting is visible.
+cat >"$FILLER" <<'PERL'
+use strict;
+use warnings;
+
+$| = 1;
+for my $row (1 .. 8) {
+	print "\e[$row;1H", 'F' x 30;
+}
+sleep 100;
+PERL
+
+$INNER new-session -d -s inner -x 60 -y 20 'sleep 100' || exit 1
+$INNER set-option -g status off || exit 1
+$INNER set-option -g window-size manual || exit 1
+
+# Three rows of panes; the middle row is short and split into three so that
+# the middle pane has other panes on both sides and above and below.
+$INNER split-window -d -v -t inner:0.0 'sleep 100' || exit 1
+$INNER split-window -d -v -t inner:0.1 'sleep 100' || exit 1
+$INNER resize-pane -t inner:0.0 -y 6 || exit 1
+$INNER resize-pane -t inner:0.1 -y 4 || exit 1
+MID=$($INNER split-window -d -h -P -F '#{pane_id}' -l 20 -t inner:0.1 \
+    'sleep 100') || exit 1
+$INNER split-window -d -h -l 20 -t inner:0.1 'sleep 100' || exit 1
+
+# The covered pane is the one in the middle of the short row.
+set -- $($INNER list-panes -F '#{pane_left} #{pane_id}' -f '#{==:#{pane_top},7}' |
+    sort -n | awk '{ print $2 }')
+[ $# -eq 3 ] || fail "expected three panes in the middle row, got $#"
+COVERED=$2
+X=$($INNER display-message -p -t "$COVERED" '#{pane_left}')
+Y=$($INNER display-message -p -t "$COVERED" '#{pane_top}')
+W=$($INNER display-message -p -t "$COVERED" '#{pane_width}')
+H=$($INNER display-message -p -t "$COVERED" '#{pane_height}')
+
+# Bigger than the covered pane on all four sides.
+FLOAT=$($INNER new-pane -d -PF '#{pane_id}' -x $((W + 6)) -y $((H + 4)) \
+    -X $((X - 3)) -Y $((Y - 2)) "perl '$FILLER'") || fail "new-pane failed"
+
+$INNER respawn-pane -k -t "$COVERED" "TRIGGER='$TRIGGER' perl '$EMITTER'" ||
+    exit 1
+
+$OUTER new-session -d -s outer -x 60 -y 20 'sleep 100' || exit 1
+$OUTER set-option -g status off || exit 1
+$OUTER set-option -g window-size manual || exit 1
+$OUTER set-option -g default-terminal screen || exit 1
+$OUTER respawn-pane -k -t outer:0.0 \
+    "$TEST_TMUX -Lcovers-inner-$$ -f/dev/null attach-session -t inner" ||
+    exit 1
+
+wait_outer_has FFFFFFFFFF
+sleep 1
+: >"$TRIGGER"
+wait_inner_has COVERED "$COVERED"
+sleep 1
+$OUTER capture-pane -p -t outer:0.0 >"$CAPTURE"
+grep -q COVERED "$CAPTURE" && fail "covered pane drawn over floating pane"
+
+exit 0