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Mastering Integration Testing in React Applications with Amplify UI

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The Importance and Process of Integration Testing in React Applications

Integration testing is a crucial stage in the development process of any application, including those built on React. It's a type of testing that validates the communication and cohesion between different modules of an application1. Let's dive in further to understand the importance of integration testing and how to implement it effectively in React applications.

What is Integration Testing?

Integration testing is the process of verifying that different components or modules of an application work together as intended2. It helps to identify any communication issues between the modules and ensure seamless functioning of the application. Integration testing is one step above unit testing (which tests individual components in isolation) and one step below end-to-end (E2E) testing (which tests the complete functionality from start to end)3.

Why Integration Testing is Necessary

Integration tests strike a perfect balance between unit and E2E tests3. While unit tests help in catching and fixing bugs in early stages and are quick to run, they cannot identify issues in the interaction between components. On the other hand, E2E tests can spot problems that occur when the application runs as a whole, but they are slower and more complex to write and maintain3.

Integration tests validate that the composition of components in a React app results in the desired user experience2. They ensure that different parts of an application work cohesively, making them an indispensable part of software development123.

Libraries for Integration Testing in React Applications

While there are multiple tools available for integration testing, two libraries stand out for React applications: Enzyme and react-testing-library13.


Enzyme is a popular library for testing React applications1. However, it has been noted that Enzyme encourages testing implementation details, which is not a good practice. Test cases written with Enzyme might break with code refactoring even if the functionality remains the same1.


As an alternative, react-testing-library focuses on testing the applications "as a user would"12. It encourages writing tests that closely resemble the way the software is used, leading to tests that give more confidence and are less prone to breakage on refactoring12.

Writing Integration Tests for React Applications

The requirements for writing integration tests for React applications include2:

  • Testing the application use-cases from the user's perspective.
  • Mocking API calls to not depend on API availability and control the data to be tested.
  • Asserting on React DOM state rather than component state.

Libraries such as Jest and react-testing-library enable writing such tests3. Jest provides a complete testing platform, while react-testing-library is used for interacting with React components during tests3.


Integration testing is a vital part of the development process of React applications. It ensures that the application modules work cohesively, providing the desired user experience. The react-testing-library, along with Jest, provides a powerful platform for creating integration tests that ensure maintainability and reliability of React applications123.

By using Amplify UI's ReactJS framework, you can leverage pre-designed Figma templates for integration testing! Check out our Marketplace Template4, Social Media Template5, and CMS Template6. For those looking for free resources, our Todo List Template7 and Blog Template 8 are readily available for use.

Improve your React application's quality and reliability with effective integration testing today!


  1. Integration Testing in React - Medium 2 3 4 5 6 7 8

  2. React Integration Testing with React-testing-library - Toptal 2 3 4 5 6 7

  3. How To Write Integration Tests With Jest And React Testing Library - Coderpad 2 3 4 5 6 7 8

  4. Marketplace Template

  5. Social Media Template

  6. CMS Template

  7. Todo List Template

  8. Blog Template

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