Mocha before callbacks

Created on March 1, 2021

Tags: testing, javascript, mocha

# TL’DR

All before block run first in top down order
Then all beforeEach blocks run in top down order
Then all the afterEach blocks run in top down order
Finally all the after blocks run in top down order

# Example

This is from before.js gist:

1: describe('mocha before hooks', function () {
2:   before(() => console.log('*** top-level before()'));
3:   beforeEach(() => console.log('*** top-level beforeEach()'));
4:   describe('nesting', function () {
5:     before(() => console.log('*** nested before()'));
6:     beforeEach(() => console.log('*** nested beforeEach()'));
7:     it('is a nested spec', () => true);
8:   });
9: });

  mocha before hooks
*** top-level before()
    nesting
*** nested before()
*** top-level beforeEach()
*** nested beforeEach()
      ✓ is a nested spec


  1 passing (8ms)