title: How to convert body value then validate with RestAssured without extracting response
body: <p>I have a String value being returned from restAssured that I want to convert to a DateTime then validate. One easy way to do this would be:</p>
  
  <pre><code>MockMvcResponse response = this.given
          .accept("application/json")
          .body(body)
          .when()
          .put(link)
          .then()
          .extract().response()
  
  String jsonStr = response.asString()
  Map json = strToJson(jsonStr)
  assert(MyFixedDateTime.equals(new DateTime(json.dateAttr))
  </code></pre>
  
  <p>Is there a way to do this without extracting the response?</p>