Hi Harsh, over at https://www.mansystems.com/smart-digital-factory/tooling you can find multiple tools for Mendix projects. These cover:
The tools Andrej mentions are great. If however you want to stay from or have no budget for the fees, your alternatives are the module Unittest and the tools Selenium, JMeter, SoapUI (best use SoapUI Pro, but that is approx. 300 euro per year).