A QA Guide To Testing React Native Apps

If you’re building a React Native app, testing your app is just as important as building it. But how do you go about testing it? In this blog post, I’ll outline some strategies for testing React Native apps using Jasmine and Mocha.

What is react native?

React Native is a framework for building native apps with JavaScript. It’s open source, and it’s free to use!

In simple terms, React Native allows you to create high-quality mobile applications using only JavaScript as the programming language of choice. It also has an amazing community behind it that helps you out with any questions or problems you might have during your development process.

Why use react native?

React Native is a JavaScript framework for building mobile apps. It’s by far the best option when you want to build a mobile app for both iOS and Android. React Native also offers a great way to develop cross-platform apps, which means that your code will run on both platforms without any changes.

React Native has been around for years now, so there are already plenty of resources available online about this topic – including this blog post!

How to test you app?

There are many ways to test your app. You can test it on a real device, on the simulator or even with different versions of React Native and Android.

But what if you don’t have access to any of those resources? In this article we will explain how you can test your React Native application without having access to anything but an iOS device running X code 8.3 beta 10 (or newer) with X code 9 installed as well as some knowledge about testing tools like selenium web driver etc..

Testing is a very important part of your development cycle.

Testing is a very important part of your development cycle. It helps you catch bugs, find out what users want and improve the user experience.

Testing React Native apps is done with Jest and Enzyme. These tools make it easy to write unit tests for your app code base as well as integration tests that test how different parts of the system interact with each other.

Why testing is important?

Testing your app is important because it helps you find bugs and improve the quality of your app.

Testing your React Native application helps you understand how your app works, what users want from it, and whether or not they’re using it correctly.

If an error occurs when running through the tests, the code will fail without any other information about why that error occurred.

How to start testing?

The first step to testing your React Native app is to describe your app with words. You can talk about the app, break it down by features and create a test plan for each feature.

For example, let’s say you have a navigation menu in your mobile application that looks something like this:

You can start by figuring out what kind of state changes occur within each element individually (e.g., clicking on any button). Then, move onto testing how these state changes affect other elements such as text boxes or images within that page/tab etcetera. Next would be testing how these individual states change when different buttons are pressed (e.-g., if I press ‘Back’ then ‘Navigate Home’ should be enabled).


Describe your app with words

The first step to testing a React Native app is to describe your app with words. Describe the purpose of your app, what value it provides for users, and include details about any features or user interface elements that will be used in testing.

For example:

  • “My App’s Purpose Is To Do A Thing.”
  • “My App’s Value Is High.”
  • “Users Can Easily Find Their Way Around My App’s Interface With Its Easy-to-follow Navigation Structure.”

Talk about the app

It is always good to talk about the app. The first thing that you should do when writing an article is write a summary of what your audience will learn from it.

When writing this article, I decided to start with the following:

  • We’ll be talking about how to test React Native apps using Mocha and Chai, two popular testing frameworks for JavaScript applications.
  • We’ll also discuss some best practices when testing mobile apps in general so that we can create better quality code and make our applications more reliable by avoiding common mistakes made by developers around the world who don’t know how they work yet (but will learn soon).

After reading this article, you should be able to use Mocha/Chai properly!

Break it down by features

Once you have an idea of what the app will look like, it’s time to break it down into features. A feature can be anything that affects the user’s experience. For example, in a social media app, a feature could be posting a status or liking someone’s post on Facebook. It can also be providing users with filters so they can find interesting content more easily (like using tags or keywords). You want to test each individual feature separately from all other features so that you can ensure quality control at every level of your product development process.

Create a test plan for each feature

To test your React Native app, you will need to create a test plan for each feature. The tests should cover the entire flow of your application and make sure that it works as expected.

The first step in this process is to write the tests for each component in order to make sure that they work as expected. For example, if you have a component called “Button”, then write some code that makes sure it displays “Hello World” when tapped on or clicked on by user input methods like touch events or keyboard keys pressed down on them (e.g., Ctrl + A).

Next up: Write Tests For State Changes!

Test your visual elements first

First, test your visual elements. This includes text, images and other visual components of your app.

Visual elements are what users see when they use your app and interact with it. If it’s not tested properly, these can lead to UX issues in the long run.

Test state changes

You should test your app’s state changes. State changes are divided into four types:

  • State changes (e.g., new data being loaded from the server)
  • Transitions between states (e.g., a successful navigation from one screen to another)
  • Errors and exceptions (e.g., a network error occurs when loading the data)
  • The initial state of your application after it has been launched

Test the flow of your app

You should test the flow of your app.

  • Test that the user can get through the flow of your app, from one screen to another.
  • Test that they can do what they want to do, or find where they need to go in order for it to work properly for them (this might mean looking at other parts of the app).

Keep things simple and test one thing at a time

  • Keep things simple and test one thing at a time
  • Test all the different states
  • Test all the different flows.
  • Test your visual elements first, then state changes, then app’s flow.


Testing React Native apps is an important part of your development cycle. It’s a good idea to test each feature you add to your app using the TDD process. As you test more and more features, you will find that it becomes easier because of all the experience you have gained from previous tests.

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About the Author

Ronan Healy

Hi everyone. I'm part of the EuroSTAR team. I'm here to help you engage with the EuroSTAR Huddle Community and get the best out of your membership. Together with software testing experts, we have a range of webinars and eBooks for you to enjoy and we have lots of opportunities for you to come together online. If you have any thoughts about the community, please get in contact with me.
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