REST testing is sending requests to a REST API and verifying responses. SoapUI provides supports for testing RESTful web services, representations, etc.
API testing needs an application to interact with API. To test an API, you require two things,
Testing Tool/Framework to drive the API
Write your own code to test the API
If you want to create a REST API with Node Js, then check out this you can enroll in this Node Js Certification program by Intellipaat
Also, watch this video on the REST API with Node JS to understand more:
