/usr/bin/libwebsockets-test-client
/usr/bin/libwebsockets-test-echo
/usr/bin/libwebsockets-test-fraggle
/usr/bin/libwebsockets-test-ping
/usr/bin/libwebsockets-test-server
/usr/bin/libwebsockets-test-server-extpoll
You may install this package on Debian with
apt-get
install libwebsockets-test-server