### Question:
DBClient { String getJSObject(final ArrayList<ArrayList<String>> list) { StringBuffer sb = new StringBuffer(); sb.append("{result: [["); boolean isFirst1 = true; for (Iterator<ArrayList<String>> iterator = list.iterator(); iterator.hasNext(); ) { if (isFirst1) isFirst1 = false; else sb.append(",["); ArrayList<String> record = iterator.next(); for (int i = 0; i < record.size(); i++) { if (i != 0) { sb.append(","); } String value = record.get(i); sb.append("\"" + Utils.makeString(value) + "\""); } sb.append("]"); } sb.append("]}"); return sb.toString(); }  void execute(final String driverName, final String jdbcurl,
                      final String username, final String password, final String sql); void execute(final HttpRequest request); String select(final String driverName, final String jdbcurl,
                       final String username, final String password, final String sql); HttpResponse select(final HttpRequest request); @Override String toString(); public String driverName; public String jdbcurl; public String username; public String password; public String sql; }### Answer:
@Test public void testGetJSObject() throws SQLException, ClassNotFoundException { final DBClient dbClient = new DBClient(); ArrayList<ArrayList<String>> list = new ArrayList<ArrayList<String>>(); ArrayList<String> columnNames = new ArrayList<String>(); columnNames.add("h1"); columnNames.add("h2"); columnNames.add("h3"); list.add(columnNames); ArrayList<String> record1 = new ArrayList<String>(); record1.add("a1"); record1.add("a2"); record1.add("a3"); list.add(record1); ArrayList<String> record2 = new ArrayList<String>(); record2.add("b1"); record2.add("b2"); record2.add("b3"); list.add(record2); assertEquals("{result: [[\"h1\",\"h2\",\"h3\"],[\"a1\",\"a2\",\"a3\"],[\"b1\",\"b2\",\"b3\"]]}", dbClient.getJSObject(list)); assertEquals("{result: [[\"h1\",\"h2\",\"h3\"],[\"a1\",\"a2\",\"a3\"],[\"b1\",\"b2\",\"b3\"]]}", dbClient.getJSObject(list)); }