How to disable Jest `console.log` tags

Question

I have some NodeJS logging done via console.log() internally (its actually loglevel) and as I see it, Jest tags console.log output with console.log ../path/to/string/with/console.log/call:line# for whatever reason:

I haven't found any related options in the docs. How can I disable it?

Answer 1

IMPORTANT:

I had the curiosity to take a look to the answer mentioned in the first answer, wich it says:

Looking at the source code for Jest, it doesn't seem like there is a neat way to turn those messages off.

And I noticed an update marked on the answer and resolves the problem.

Solution:

Just add this code to your test:

beforeEach(() => {
    global.console = require('console');
  });

Answer 2

Thanks @Anders Carstensen, I've looked at the answer you mentioned and it says:

Looking at the source code for Jest, it doesn't seem like there is a neat way to turn those messages off.

Not an option for me to write my own console, so I'll just stick with Mocha/Sinon for now.

Answer 3

Create a global configuration test file e.g. src/test/config.js, add this line to that file:

jest.spyOn(console, "log").mockImplementation();

add this to jest config:

setupFilesAfterEnv: ['./src/test/config.js']

you can also use that file for global cleanup, before/after each etc