Insert a Script following the Message whose response you wish to validate.

Ensure that the Script doesn't play until the Message has completed.

If you are using a Sequenced Test Clip, this will always be the case and there is nothing special to do.

If you are using a Timed Test Clip, then you must either put the Message and the Script together into a Chain or put a Checkpoint between the Message and the Script. You could also insert a Delay between the Message and Script that you know will always be long enough, but this may not be consistently reliable if the response times to your Message vary.

Your script should look something like the following:

// This Script looks at the response to the Message that // precedes it (it assumes that a Message precedes it), // and verifies that the HTML response to the Message // has a title of "Page 1".If it does not, it aborts // play of the current Test Composition. // Get the Message that immediately precedes this // Script. var msg = $context.currentItem.previousItem; // Extract the title from the HTML response. Note that // the Xpath processor for HTML requires that the // XPath be in all uppercase, and the search is not // case sensitive. var pageTitle = msg.getResponse(msg.RESPONSE_HTTP_BODY_AS_HTML, "//HTML/HEAD/TITLE"); // Was the title found in the HTML, and if so is it the // expected value? if (pageTitle == null) { // No title tag was found in the HTML. // Abort the Test Composition with an error. $context.composition.abort("Response for " + msg.name + ": HTML page has no title."); } else if (pageTitle != "Page 1") { // The title is not what we are expecting. // Abort the Test Composition with an error. // Include the actual page title in the "details" // of the error. $context.composition.abort("Response for " + msg.name + ": HTML page title does not match.", pageTitle); } else { // The title is what we're expecting. // Put an informational message into the Result. $context.result.postMessage($context.result.LEVEL_INFO, "Response for " + msg.name + " passed validation."); }

Note that your Script could also put the extracted value into a property, insert it into another message, or do anything with that value that a Script can do.