add mocha aftereach tutorial

Author: vkarpov15

src/tutorials.js

@@ -5,6 +5,14 @@ const moment = require('moment');
 const axiosPath = require('./axiosPath');
 
 const tutorials = [
+  {
+    title: 'The `afterEach()` Hook in Mocha',
+    raw: './tutorials/mocha/aftereach.md',
+    url: '/tutorials/mocha/aftereach',
+    description: 'Here\'s how Mocha\'s afterEach() hook works.',
+    tags: ['mocha'],
+    date: moment('2023-08-25')
+  },
   {
     title: 'Check if a Date is Valid in JavaScript',
     raw: './tutorials/fundamentals/check-if-date-is-valid.md',

tutorials/mocha/aftereach.md

@@ -0,0 +1,68 @@
+By default, [Mocha's BDD interface adds a global `afterEach()` function](https://mochajs.org/#bdd).
+You can call `afterEach()` with a function, and Mocha will execute that function after every test in the suite.
+You should use `afterEach()` to clean up any persistent state your test created, like entries saved in your database or calling `sinon.restore()`.
+
+```javascript
+afterEach(function() {
+  console.log('Running afterEach!');
+});
+
+// Prints "Running afterEach!" after "test1"
+it('test1', function() {
+  console.log('test1');
+});
+// Prints "Running afterEach!" after "test2"
+it('test2', function() {
+  console.log('test2');
+});
+```
+
+`afterEach()` is like [`beforeEach()`](/tutorials/mocha/beforeeach), but runs after every test rather than before.
+
+## With `describe()`
+
+`describe()` lets you scope `afterEach()` hooks.
+If you define a `afterEach()` in a `describe()`, Mocha will not run that `afterEach()` on any tests outside of that `describe()`.
+
+```javascript
+afterEach(function() {
+  console.log('Running global afterEach!');
+});
+
+describe('my test suite', function() {
+  afterEach(function() {
+    console.log('Running my test suite afterEach!');
+  });
+
+  // Prints both "Running afterEach!" and "Running my test suite afterEach!"
+  it('test1', function() {});
+  // Prints both "Running afterEach!" and "Running my test suite afterEach!"
+  it('test2', function() {});
+});
+
+// Only prints "Running global afterEach!"
+it('test3', function() {});
+```
+
+So a global `afterEach()` will run after every test, even tests within a `describe()`.
+But a `afterEach()` hook within a `describe()` will not run on any test outside of that `describe()`.
+
+## Skipped Tests
+
+Mocha will **not** run `afterEach()` if there are no tests.
+For example, if you [run a single Mocha test](./run-single-test) using `.only()`, Mocha will not execute the `afterEach()` hook in the following test file.
+
+```javascript
+describe('my test suite', function() {
+  afterEach(function() {
+    console.log('Running my test suite afterEach!');
+  });
+
+  it('test1', function() {});
+  it('test2', function() {});
+});
+
+// Because of `.only()`, Node will **not** print
+// "Running my test suite afterEach!"
+it.only('test3', function() {});
+```