How To Test React Js Applications With React Library?

Without quality assurance, software development is incomplete. React Js Applications testing ensures that an application is defect-free, which saves the cost of resolving user experience bottlenecks after the product releases. Furthermore, it contributes to the delivery of a high-quality product with a better end-user experience, which is critical for attracting and retaining customers. Choosing the right web development framework is critical for creating a high-quality app.

The term testing has huge importance in the creation of react js applications.

Let us understand why and how to do the testing in this blog post.

What Is Testing In React Js Applications?

Testing in the react js applications means making sure that the code the developer creates works fine. This also ensures that the application is working the same as it should.

Furthermore, testing has become the most important part of building react js applications. If your code or application passes the testing phase that means you have the best knowledge of react js application development.

Now let’s understand why one needs a testing in the react js applications building.

Why Do You Need Testing In React Js Applications?

Before you ship you’re react js applications to end users, make sure it works as they should.

Just as it is critical to test our project as a whole before releasing it to end users, it is also critical to continue testing our code throughout the project’s lifespan. We may update our react js applications or refactor some of our code. In some cases, something stops working for no apparent reason — things can go wrong unexpectedly.

As a result, we must test our code on a regular basis throughout the life of a project.

There are two types of software tests: manual and automated. When this repeats several times, this type of test becomes less reliable because it is easy for the tester to overlook some details between test runs.

In an automated test, however, a machine executes a test script. We can be certain that whatever details we set in the script will remain unchanged on each test run by using a test script.

This type of test has the advantage of being predictable and fast, allowing us to quickly find and fix bugs in our code.

Having seen the necessity of testing our code, the next logical question is, what sort of automated tests should we write for our code?

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Automated Testing Methods

There are numerous kinds of automated software testing. Moreover, Unit tests, integration tests, functional tests, end-to-end tests, acceptance tests, performance tests, and smoke tests are some of the most common.

1. Unit Testing

Unit testing is the practice of evaluating software modifications on a single unit or component. During the creation of an application, unit testing is frequently done by the developer. Each unit test during unit testing might be views as an item, a feature, a process, or a method. Developers typically use test automation technologies like NUnit, Xunit, and JUnit for test execution.

Unit testing is essential since it enables us to find more bugs.

2. Security Testing

A qualifying team carries out this kind of testing. Accessing the system will be possible using any hacking method.

Moreover, security testing is done on software, programs, and websites to see how well-defensive they are against internal and/or external threats. Testing is done to determine the robustness and security of the authorisation and authentication procedures as well as the level of software security against viruses and harmful programs.

Furthermore, it also looks at how the software react to hacker attacks and harmful software, and how software is kept up to date for data protection after a hacker attack.

3. Usability Testing

Usability testing looks at an application’s look, feel, and usability from the user’s point of view.

4. Compatibility Testing

These tests confirm how the software performs and runs in a variety of settings, including network, hardware, and web server environments.

To ensure that it can function on a variety of settings, databases, and browser versions, software must pass compatibility testing. The testing team conducts compatibility testing.

React Testing Library: Why Use It?

There are a number of testing choices available for testing React js applications, however, the most popular ones I am aware of are Enzyme and React Testing Library (RTL).

Among the family of packages, RTL is a subset. Its philosophy is extremely straightforward. Whether you utilize redux or context for state management is irrelevant to your users. They are fewer concerns with the separation between class and functional components and the simplicity of react js applications. They merely demand specific functionality from your app. Therefore, it should come as no surprise that the testing library’s main tenet is

Therefore, always keep the end user in mind and test your app according to how they would use it.

You can benefit from RTL in a variety of ways. Furthermore, starting with it is a lot simpler. RTL and Jest are already set up in any new React project that uses CRA to start. It is also suggested as the go-to testing library in the React documentation. Last but not least, the guiding philosophy – functionality over implementation details — makes a lot of sense.

Now that that is out of the way, let’s begin constructing a to-do list app using the TDD methodology.


These methodologies can help the developers with the testing and help to create many good react js applications.

Furthermore, if you want to hire react js developer for creating react js applications then you should definitely confirm whether he/she is aware of the testing techniques or not. Moreover, a reputed software development company can also help you with the creation of react js applications.