Want to know the testing process of the VueJS application? Then this is the best article that deals with Testing VueJS applications. Before we start the article let’s know why testing is necessary.
Why Testing is necessary?
Well, Testing helps you make sure all parts of your app work as expected. It gives you the confidence to ship often while being able to refactor later knowing you won’t break anything.
It also improves the quality of your code and works as documentation. But while these are valid reasons to test as well, we’d rather highlight developer confidence – it’s the key thing (for us). Unit testing improves the maintainability of your code.
There are several types of tests.
- Unit tests – the smallest tests of single units (one assertion per test for one component)
- Integration tests that help see if the units work together
- End-to-end tests simulate the experience of a real user of your app
Testing VueJS Applications
Unit tests test the functionality of an individual unit of code isolated from its dependencies. They are the first line of defense against errors and inconsistencies in your codebase. Unit testing is a fundamental part of the Test-Driven Development (TDD) process.
VueJS has become one of the most popular web application frameworks in recent years. That is hardly surprising given how adaptable, user-friendly, and productive it is. But none of this matters if you haven’t thoroughly tested your application.
Regardless of the sort of testing you intend to perform, selecting the correct toolset is an important aspect of optimizing the software testing process. As a result, in this post, we will introduce the five VueJS testing tools, addressing various testing viewpoints.
If you are a beginner then we recommend checking the best Vue 3 Tutorial For Beginners so that you can easily start your journey as a VueJS developer.
Now let’s begin..!!
Vue-test-utils is the official library for (unit) testing your Vue components. It works with any of the test runners below (and also others!). If you use vue-CLI, it can set your project up for unit tests with vue-test-utils – and also configure a testing framework like Jest. It also provides methods to mount and interact with Vue components in an isolated manner.
However, you need to use a separate package called Vue Test Utils to mount Vue components, and then Jest can be used to execute the components’ unit test.
Apart from running tests, Jest comes with loads of other features like code coverage, mocks, and snapshot testing.
Well, performance testing is a testing mechanism to measure and identify all the aforementioned performance-related bottlenecks. Vue Performance DevTools is a browser extension. This extension aims to inspect the performance of Vue components. Besides, It statistically checks a Vue component’s performance based on the measures collected by Vue using the `window.performance` API. It is one of the Best Vue DevTools for better development.
Some of the many uses of Vue Performance DevTools are as follows:
- Unmount or remove the component instances which are not being used.
- Inspect the factors which block or take more time after an operation has been started.
- Inspects the component, which takes more time to load.
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Now, modern web applications are a combination of various sub-components and systems. Thus, it is challenging to test and diagnose errors in these complicated applications by examining the functional flow. Therefore, End-to-end testing was introduced to address this issue, and with E2E testing, you can ensure the application’s complete health from all perspectives.
It doesn’t matter whether your application is component-based, uses frontend components, or uses server rendering; Cypress is independent of any particular framework. Besides, it stimulates the behavior of regular users as if they were using your application.
To make your testing experience truly painless Cypress team has put a lot of thought into when designing this end-to-end test runner. Built-in recording, simple CI setup, robust API, and many other features make Cypress a developer-friendly E2E tool.
You can also write end-to-end tests for the Vue application using the official @vue/CLI-plugin-e2e-cypres plugin. Apart from testing E2E using Cypress, you can use it to perform unit tests and integration tests as well.
Also, it provides functions that execute in a specific order and logs the results in the terminal window. In addition, It also cleans the state of the software being tested to ensure that test cases run independently of each other.
While it can be used with most assertion libraries, this one is commonly used with Chai, a popular assertion library for Node.js and the browser. Furthermore, It is super flexible and therefore may be a bit more complex to set up.
So, here we listed down the best 5 tools for testing vuejs applications. As there are a lot of tools and support available to help you set up your tests exactly as you want, these are the initial tools that you will need to do tests on Vuejs applications.
It is necessary to make sure your app works well. For that, you will always need tools that ensure error-free development. Using the mentioned tools for testing the vuejs application will surely help you to do so.
We hope you find this collection helpful and noteworthy. Let us know which one you use for testing your vuejs application. Also, don’t forget to share this collection with your friends and colleagues.
For more front-end tools we suggest you refer to the best Front end tools for web development.