mocha.test.js

var assert = require('assert');
let failureCount = 0;

before(function () {
    console.log('before()', failureCount)
});

beforeEach(function () {
    console.log('beforeEach()', failureCount)
});

after(function () {
    console.log('after()', failureCount)
});

afterEach(function () {
    console.log('afterEach()', failureCount)
});


describe('Test 1', () => {
    it('should fail', () => {
        failureCount++
        console.log('Test 1', failureCount)
        assert.equal(false, true);
    });
});

describe('Test 2', () => {
    beforeEach(() => {
        console.log('beforeEach()', failureCount)
        failureCount = 0
    });

    it('should pass', () => {
        assert.equal(false, false);
    });
});

describe('Test 3', () => {
    it('should equal 0', () => {
        assert.equal(failureCount, 0);
    });
});

output.txt

SL-0369:mocha-test nikolayadvolodkin$ ./node_modules/mocha/bin/mocha


before() 0
  Test 1
beforeEach() 0
Test 1 1
    1) should fail
afterEach() 1

  Test 2
beforeEach() 1
beforeEach() 1
    ✓ should pass
afterEach() 0

  Test 3
beforeEach() 0
    ✓ should equal 0
afterEach() 0

after() 0