String[] roleNames = admin.getRoleNames();
assertEquals(4, roleNames.length);
// delete
admin.deleteUser("vajira");
assertFalse(admin.authenticate("vajira", "credential"));
admin.addUser("vajira", "credential", new String[] { "role1" }, userProps, null, false);
admin.deleteRole("role1");
admin.addRole("role1", new String[] { "dimuthu" }, permisions);
}