final ChatMessage.ChatSource source = new ChatMessage.ChatSource(1, doc);
        assertEquals("http://proxy.example.com/file.doc", source.getUrlLink());
        assertNull(source.getGoUrl());

        source.setGoUrl("/go/?rt=123&docId=doc123&queryId=q1&order=0");
        assertEquals("/go/?rt=123&docId=doc123&queryId=q1&order=0", source.getGoUrl());
    }

    // ========== searchWithQuery with filters tests ==========

        for (int i = 0; i < sourceList.size(); i++) {
            final ChatSource source = new ChatSource(i + 1, sourceList.get(i));
            source.setGoUrl(buildGoUrl(contextPath, source.getDocId(), queryId, requestedTime, i));
            assistantMessage.addSource(source);
        }
    }

    /**