Node.js: Testing with VCR [closed]

Is there a VCR testing system for node.js?

Can you write a node js test without an external library?

If you've ever written tests for a Node. js application, chances are you used an external library. However, you don't need a library to run unit tests in Javascript.

How node JS code is executed?

Event-loop is what allows Node. js applications to run non-blocking asynchronous I/O based operations i.e, all the asynchronous code is managed and executed within the event-loop and before that, we can use our synchronous code which is in this case known as Top-Level code.

Node nock, which is part of the flatiron library/framework has this feature, look here