Groovy script to validate ResponseData in JMeter -

i have written script verify field types, i'm not sure if being validated correctly. want verify expected fields seen. bsf assertion:

import groovy.json.*;  def response = prev.getresponsedataasstring();     def json = new jsonslurper().parsetext(response)  def eventname = json.event_name (eventname.getclass() == string)  def eventdate = json.event_start (eventdate.getclass() == date)  def attendeelimit = json.attendee_limit (attendeelimit.getclass() == integer)  def ordercount = json.order_count (ordercount.getclass() == integer)  def attendancelimit = json.attendance_limit_on (attendancelimit.getclass() == string) 

1. if want check json response data types change lines like

   (eventname.getclass() == string) 

   to

   assert eventname instanceof string 

   see groovy testing guide details

2. i suggest switching fro bsf assertion jsr223 assertion able compile script , cache hence script perform better. see beanshell vs jsr223 vs java jmeter scripting: performance-off you've been waiting for! article comprehensive explanation , scripting best practices.

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there json path assertion available via jmeter plugins, 1 used check response content