How to set timeout on before hook in mocha?

Question

I want to set timeout value on before hook in mocha test cases. I know I can do that by adding -t 10000 on the command line of mocha but this will change every

Answer 1

as instructed at https://mochajs.org/#hook-level, you have to use a regular function call to set the timeout.

before(function(done) {
  this.timeout(3000); // A very long environment setup.
  setTimeout(done, 2500);
});

if you insist on use arrow or async function in the hook. You may do it this way:

before(function (done) {
  this.timeout(3000);
  (async () => {
    await initilizeWithPromise();
  })().then(done);
});

It is quite helpful and nice-looking if you got multiple async calls to be resolved in the hook.

updated: fuction def works well with async too. So this hook can be upgraded to

before(async function () {
  this.timeout(3000);
  await initilizeWithPromise();      
});

So it provides benefits from both this and await.

By the way, mocha works pretty fine with promises nowadays. If timeout is not a concern. Just do this:

before(async () => {
  await initilizeWithPromise();
});