private void filter() throws ServletException, IOException {
final boolean sessionExisted = request.getSession(false) != null;
assertFalse(chain.doFilterCalled());
control.replay();
filter.doFilter(request, response, chain);
control.verify();
assertTrue("Should call chain", chain.doFilterCalled());
if (!sessionExisted) {
assertNull("Should not create session", request.getSession(false));
}
}
