Mocha with Node: Only show logging for tests that fail

Question

I'm using node with mocha and winston. Is there a way to set it up so it only shows logs for failing tests?

Answer 1

As of writing (in 2022), there's now an npm package that does exactly this:

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

I like it because I like the output from the default mocha reporter. It keeps all that, but hides console output for succeeding tests.

Answer 2

Possible to use

if (!expect(next.called).to.be.true) {
        console.log("... further information")
}