ElasticsearchExprValueFactory { private ExprStringValue constructString(String value) { return new ExprStringValue(value); }  ExprTupleValue construct(String jsonString); ExprValue construct(String field, Object value);  }
@Test public void constructString() { assertEquals(stringValue("text"), tupleValue("{\"stringV\":\"text\"}").get("stringV")); assertEquals(stringValue("text"), constructFromObject("stringV", "text")); }