isUserInRole does not return the expected value.

[hantsy]

I used manul way to process login progress in my applciation, it worked well. but in the JSF test case, It can not detect the ROLE.

@Test
    @InitialPage("/login.jsf")
    public void testLoginPage(JSFServerSession server, JSFClientSession client)
            throws IOException {
        Assert.assertEquals("/login.xhtml", server.getCurrentViewID());

        client.setValue("loginForm:username", "user");
        client.setValue("loginForm:password", "user");
        client.click("loginForm:loginButton");

        Assert.assertEquals("/admin/unconfirmed.xhtml",
                server.getCurrentViewID());
        Assert.assertEquals("user", server.getFacesContext()
                .getExternalContext().getRemoteUser());

   //Assert.assertTrue(server.getFacesContext()
   //             .getExternalContext().isUserInRoles("ROLE_VIEWER");
        log.info("server.getFacesContext().getExternalContext().getUserPrincipal()@"
                + server.getFacesContext().getExternalContext()
                        .getUserPrincipal());

        client.click("logoutForm:logoutButton");
        Assert.assertEquals("/login.xhtml", server.getCurrentViewID());
        Assert.assertNull(server.getFacesContext().getExternalContext()
                .getRemoteUser());
    }

//Assert.assertTrue(server.getFacesContext()

//.getExternalContext().isUserInRoles("ROLE_VIEWER");

This will cause test failed...any help here?