Validate JSON Response Body with Rest Assured for Effective API Testing

Learn how to validate JSON response body in `Rest Assured`. Discover how to check for specific genres and author names efficiently!
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This video is based on the question https://stackoverflow.com/q/72447655/ asked by the user 'balantain' ( https://stackoverflow.com/u/15460104/ ) and on the answer https://stackoverflow.com/a/72455838/ provided by the user 'lucas-nguyen-17' ( https://stackoverflow.com/u/7574461/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Understanding Response Body Validation in Rest Assured

When it comes to working with REST APIs, ensuring that the response body is accurate is crucial. This is where libraries like Rest Assured come into play, enabling developers to easily validate that their APIs return the expected data.

In this guide, we will explore how to validate a JSON response body using Rest Assured, specifically focusing on checking for specific genres of books and the names of their authors. Let’s dive in!

The JSON Response

Let's first take a look at a sample JSON response that we will be working with:

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From this response, we have the following requirements:

Check if the ‘books’ section contains a kids genre.

Verify if the book of kids genre has the author’s name as Eric.

Part 1: Validating the Genre

To check if the books section includes the genre kids, we can use the following code snippet:

[[See Video to Reveal this Text or Code Snippet]]

This assertion uses JsonPath to query the JSON response, checking if any item in the genre array matches kids.

Part 2: Validating the Author's Name

For the second validation, we need to check if the author of the kids' book is named Eric. You can achieve this using a condition filter like GPath. Here’s how you can express that in Rest Assured:

[[See Video to Reveal this Text or Code Snippet]]

In this snippet:

find is used to locate the specific book object where the genre is kids.

Then, we access the author.name property directly to perform the validation.

Conclusion

Validating JSON response bodies is a vital part of API testing, and Rest Assured provides powerful and straightforward methods to accomplish this. By utilizing JsonPath and functional programming concepts within the assertions, we can effectively check for the presence of specific data in our API responses.

Whether you are new to Rest Assured or looking to enhance your API testing skills, understanding how to parse and validate JSON responses will significantly improve your testing capabilities. Remember, a well-validated response can lead to more reliable and robust applications.

If you have more queries or need further assistance regarding Rest Assured or API testing in general, feel free to reach out!

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