// Test that implementations can be serialized
        FessUser user = new TestFessUser("testuser", new String[] { "role1", "role2" }, new String[] { "group1", "group2" },
                new String[] { "perm1", "perm2" });

        // Verify the interface extends Serializable
        assertTrue(user instanceof java.io.Serializable);
    }

    @Test
    public void test_allFieldsCombination() {

        testData.add(createRelatedQuery("term2", new String[] { "query2" }, "host1"));
        mockBhv.setTestData(testData);

        List<RelatedQuery> result = relatedQueryHelper.getAvailableRelatedQueryList();
        assertEquals(2, result.size());
        assertEquals("term1", result.get(0).getTerm());
        assertEquals("term2", result.get(1).getTerm());
    }

    @Test

        testData.add(createRelatedContent("term2", "content2", "host1"));
        mockBhv.setTestData(testData);

        List<RelatedContent> result = relatedContentHelper.getAvailableRelatedContentList();
        assertEquals(2, result.size());
        assertEquals("term1", result.get(0).getTerm());
        assertEquals("term2", result.get(1).getTerm());
    }

    @Test