How to suppress application logging messages from a node.js application when running unit tests?

Question

While unit-testing my node.js application (which is basically a REST backend) using mocha and supertest, I need only the test-specific message on the screen, but the stdout

Answer 1

Another way would be using mocha-suppress-logs to hide logs generated by successuful tests but still keep the ones generated by failed tests to ease debugging.

Install:

npm install --save-dev mocha-suppress-logs

Then use it like this:

const suppressLogs = require('mocha-suppress-logs');
 
describe('Something', () => {
  suppressLogs();
 
  it('should do something', () => {
    // test code
  });
});

You can also do so globally for the entire test suite.

Here's a link to the module itself:

https://www.npmjs.com/package/mocha-suppress-logs