TestRefreshableFessUser user = new TestRefreshableFessUser("testuser", true);
        assertTrue(user.refresh());
        assertEquals(1, user.getRefreshCount());

        // Test multiple refreshes
        user.refresh();
        user.refresh();
        assertEquals(3, user.getRefreshCount());

        // Test custom implementation that returns false
        user = new TestRefreshableFessUser("testuser", false);