From http://www.jwz.org/xscreensaver/xscreensaver-5.35.tar.gz

[xscreensaver] / OSX / fuzztest.sh

diff --git a/OSX/fuzztest.sh b/OSX/fuzztest.sh
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+#!/bin/sh
+# Copyright © 2016 Jamie Zawinski <jwz@jwz.org>
+#
+# Permission to use, copy, modify, distribute, and sell this software and its
+# documentation for any purpose is hereby granted without fee, provided that
+# the above copyright notice appear in all copies and that both that
+# copyright notice and this permission notice appear in supporting
+# documentation.  No representations are made about the suitability of this
+# software for any purpose.  It is provided "as is" without express or 
+# implied warranty.
+#
+# Deliver random rotate and shake gestures to the iOS Simulator window.
+#
+# To make this work, you probably need to go to "System Preferences /
+# Security & Privacy / Privacy / Accessibility" and add "Terminal.app"
+# to the list of allowed programs.
+#
+# Created: 18-Apr-2016.
+
+function menu() {
+  which="$1"
+  sim="Simulator"
+ #proc="SystemUIServer"
+  proc="System Events"
+
+  osascript -e "
+   tell application \"$sim\" to activate
+   tell application \"$proc\"
+    tell process \"$sim\"
+     tell menu bar item \"Hardware\" of menu bar 1
+      click menu item \"$which\" of menu \"Hardware\"
+      \"$which\"
+     end tell
+    end tell
+   end tell"
+}
+
+menu 'Shake Gesture'
+
+while true; do
+  i=$[ 2 + $[ RANDOM % 5 ]]
+  echo "sleep $i" ; sleep $i
+  i=$[ RANDOM % 5]
+  if [ $i == 0 ]; then menu 'Shake Gesture'
+  else
+    i=$[ RANDOM % 3]
+    if   [ $i == 0 ]; then menu 'Rotate Left'
+    elif [ $i == 1 ]; then menu 'Rotate Right'
+    else menu 'Rotate Right' ; menu 'Rotate Right'
+    fi
+  fi
+done
+
+exit 0