How to resolve process.on() unit test error?

I want to test a warning process for a Typescript project. The code that I'm trying to test is the following and the specific error that I'm getting is in the following StackOverflow post.https://stackoverflow.com/questions/63119397/how-to-resolve-process-on-test-typescript-mocha-testing-using-sinon-spyAny advice on this would be greatly appreciated!

Submitted July 27, 2020 at 05:26PM by e_n_v