assertNull(source.getTitle());
        assertNull(source.getUrl());
        assertNull(source.getDocId());
        assertNull(source.getSnippet());
    }

    @Test
    public void test_chatSourceSetters() {
        final ChatSource source = new ChatSource();

        source.setIndex(10);
        source.setTitle("Document Title");
        source.setUrl("https://test.com");
        source.setDocId("id-456");