delayed console logging for mocha

If you're unit testing code that also prints some debug info or warnings with console.log, console.warn or uses some other console output in node, then just add require('@hn3000/mocha-delayed-logging') and only see console output for failed tests.

Example output

Run npm test or yarn test in this project to see this example. (Sorry, couldn't automate the check for debug output in a failing test.)

$ npm test

> @hn3000/[email protected] test /Users/hn3000/play/mocha-delayed-logging
> mocha



  unit testing
    with logging
      ✓ won't log visibly if successful
      1) will show all logging output for failed tests (and so this test must fail)
dummy log
dummy warning
dummy info
dummy error
there should be 4 lines, each starting with `dummy`, above


  1 passing (7ms)
  1 failing

  1) unit testing
       with logging
         will show all logging output for failed tests (and so this test must fail):
     AssertionError: not an actual failure, just a way to force the logging to be visible
      at Context.<anonymous> (test/test.js:16:7)
      at processImmediate (internal/timers.js:461:21)



npm ERR! Test failed.  See above for more details.