Gain insights into testing Vue.js applications using Jest. Delve into creating unit tests and build intricate tests for Vue components to ensure your app functions flawlessly.

vue.tar.gz

L_11

L_111

L_66

L_666

L_99

L_999

L_33

L_333

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

The snapshots generated are the source of truth for deciding if a test is valid or not. That's the way regressions are checked, and in the end, it depends on your criteria.

# Example

For example, go to the `ContactBox.vue` component and change the `fullName` computed prop to be separated by a comma:

fullName() {
  return `${this.name}, ${this.surname}`;
}

ContactBox.vue

If you run the tests again, some of them will fail since the rendering result is different than before. You'll get an error like this:


>```
>The received value does not match stored snapshot 1.
>
>  - Snapshot
>  + Received
>
>    <div
>      class=""
>    >
>      <p>
>  -    John Doe
>  +    John, Doe
>      </p>
>    </div>
>```

In this lesson, we'll learn about what to do when a test fails in Snapshot Testing.

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

When a Test Fails

Example