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Front-end frameworks, in general, are exploding in popularity, and Vue.js, in particular, has become one of the most popular ones.

As front-end frameworks continue to grow in usage, the ability to incorporate testing has become an essential feature. It's simply the only scalable way to ensure your app is functioning as expected.

You can learn to test your Vue.js applications thoroughly using Jest with this interactive course.

You'll start by learning the simplest unit tests in Jest, and will gradually build up to more intricate tests of different Vue components. To give you practical front-end testing experience, you'll be running your tests on a predefined data rendering Vue.js application.

This course is essential for anyone looking to create robust and effective front-end tests for their Vue apps.

Testing Vue.js Components with Jest

## Custom Events

We can test at least two things in Custom Events:

- Asserting that after an action, an event gets triggered
- Checking what an event listener calls when it gets triggered

In the case of the `MessageList.vue` and `Message.vue components` example, that gets translated to:

- Asserting that `Message` components trigger a `message-clicked` when a message gets clicked
- Checking that when a `message-clicked` occurs, a `handleMessageClick` function is called in `MessageList`


### Step 1:

First, go to `Message.vue` and use `$emit` to trigger that custom event:

# Custom Events

We can test at least two things in Custom Events:

- Asserting that after an action, an event gets triggered
- Checking what an event listener calls when it gets triggered

In the case of the `MessageList.vue` and `Message.vue components` example, that gets translated to:

- Asserting that `Message` components trigger a `message-clicked` when a message gets clicked
- Checking that when a `message-clicked` occurs, a `handleMessageClick` function is called in `MessageList`


## Step 1:

First, go to `Message.vue` and use `$emit` to trigger that custom event:

# Custom Events

We can test at least two things in Custom Events:

- Asserting that after an action, an event gets triggered
- Checking what an event listener calls when it gets triggered

In the case of the `MessageList.vue` and `Message.vue components` example, that gets translated to:

- Asserting that `Message` components trigger a `message-clicked` when a message gets clicked
- Checking that when a `message-clicked` occurs, a `handleMessageClick` function is called in `MessageList`


## Step 1:

First, go to `Message.vue` and use `＄emit` to trigger that custom event:

In this lesson, we'll see several cases for testing Custom Events.

First Vue.js Component Unit Test

Testing Deeply Rendered Vue.js Components

Testing Styles and Structure

Testing Properties and Custom Events

Testing Computed Properties and Watchers

Testing Methods and Mock Dependencies

Testing Vue.js Slots

Enhance Jest configuration with Module Aliases

Snapshot Testing

Local Installation Guide

Custom Events

Custom Events

Step 1: