refactor: issue5.js and update test structure

[Puppo]

This PR fix the issue5.test.js file

[Puppo]

@jsumners, This PR should fix the issue you asked about here.
I restarted the entire implementation from the master implementation, applied your changes, and used psock.stdout.

BTW, before the test was wrong, Stdin is a writable stream, and we cannot use the pipe.
The issue was that the expect didn't have a check.
This is the issue

[jsumners]

Thank you.