doc.put("title", titles[i]);
            doc.put("url", "http://example.com/" + i);
            msg.addSource(new ChatSource(i + 1, doc));
        }
        return msg;
    }

    // ========== escapeQueryValue tests ==========

    @Test
    public void test_escapeQueryValue_null() {
        assertEquals("", chatClient.testEscapeQueryValue(null));
    }

    @Test