Can Companies Use Automation Testing for Both UI and API Testing?

The user interface (UI) and APIs are vital software development components. But they are often overlooked. Companies need to consider the UI and API when testing their products. This can have disastrous results.

The UI is what customers see and interact with when using the software. APIs are the back-end code that allows for communication between apps.

Automation testing can test the UI and API and ensure that the software functions well. This article discusses how companies can use automation for both UI and API testing.

How to Test the UI and API of Software with Automation Testing

This is always the fundamental question around automation testing techniques and their successful use for testing UI and API of software, as it gives the chance to blend the best of both providing the best possible experience for the user and checking the accuracy of the program to ensure it meets all the predefined expectations. It can test the UI, ensuring that it works properly and is easy to use. It also tests the API, ensuring it functions correctly with other systems. This is important because many companies release software updates before proper testing.

UI Testing Involves the Following Processes

Functional Testing

Functional testing is the most common type of UI testing. Every element on a page has to function correctly. It shows that they can be interacted with by users. It also makes sure that any changes made to the UI breaks nothing that already works. This includes testing for broken links, misplaced buttons, and missing text or images.

End-user Experience

User experience (UX) testing ensures the user can use the UI without getting frustrated. This can involve testing whether an error message appears when something unexpected happens. It also tests if users can easily find what they’re looking for on a website.

Layout Errors

Layout errors are something that can happen in any design. But they’re prevalent in UI/UX because there is so much content to fit on the page. Layout errors include overlapping text or images, misplaced buttons, and other similar issues. These make it difficult for users to navigate your site.

Usability Testing

Usability testing is a way to test the UI of your website or app. You can hire someone to do this for you, but some tools let you perform usability tests on your own. The goal of usability testing is to determine how easy it is for users to complete your product’s tasks.

Load Testing

Load testing is a way to test the performance of your website or application. It measures how well an application performs when many users access it simultaneously. Load testing can help determine if your site can handle traffic spikes regularly.

API Testing Involves the Following Processes

Business Logic Validation

Business logic validation in API testing includes ensuring that the API works. It tests to see if the API is compatible with the business logic. This includes testing all parameters, headers, and payloads sent to an endpoint. The goal is to ensure they return a response that conforms to your expectations.

Boundary Errors

Boundary errors in API testing include checking for legitimate requests and responses. This ensures that your API returns different responses when you cannot guarantee that a request to work.

Load Testing

Load testing is crucial to API testing. It allows you to determine how your application will perform under heavy traffic. This means it’s essential to test your APIs with real users and see how they respond. You can do this by using tools like JMeter.

Permutations and Combinations

Permutations and combinations determine how different combinations of data will affect your application. This is important because it allows you to find any potential bugs in your software.

UI + API Testing

U and API testing involve the following:

Crosscheck Front-end UI Logic with API Tests

Check if the UI displays the correct data and information. This is vital when you call APIs from a browser or mobile application. Check if the UI behaves as expected when using specific parameters in your API calls. You can do this by using tools such as Postman.

Optimize Permutations and Combinations with a UI Setup and API Execution

This is an essential part of UI and API testing. It involves running tests with various permutations and combinations of input data. This ensures that your application works as expected in all cases. This can be done using tools such as Selenium.

Cross-functional Tests with API Permutations and Combinations

You’ve tested the UI and API. It’s time to run cross-functional tests with various permutations and combinations. Here, you check for different teams working separately. These teams work on multiple parts of the system and should do their jobs correctly. It can be done using tools such as Jenkins.

Defect Triaging and Reporting

Once you’ve completed functional testing, it’s time to triage the defects. This involves categorizing them according to severity and priority. Then assign them to individual teams or individuals who will fix them. You might use tools such as JIRA for this purpose.


Automation for UI and API testing can help you deliver better-quality software faster. It reduces the time spent on repetitive tasks. This allows developers to focus on more important things. However, it isn’t a silver bullet that will solve your problems overnight. It requires careful planning, implementation, and maintenance to ensure it works as expected.

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