assertTrue(!sp0.equals(null));
assertTrue(!sp0.equals(new Object()));
// test SystemPermission.implies()
assertTrue(sp0.implies(sp1));
assertTrue(sp1.implies(sp0));
// test SystemPermission for authorized user against policy file
final DatabasePrincipal authorizedUser
= new DatabasePrincipal("authorizedSystemUser");
execute(authorizedUser, new ShutdownEngineAction(sp0), true);