How to Save and Reuse API Responses with the Karate Framework

Описание: Learn how to efficiently save and reuse API responses in the Karate framework, enhancing your test automation capabilities.
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This video is based on the question https://stackoverflow.com/q/72723688/ asked by the user 'Sheikh Rahman' ( https://stackoverflow.com/u/4459027/ ) and on the answer https://stackoverflow.com/a/72723771/ provided by the user 'Peter Thomas' ( https://stackoverflow.com/u/143475/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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How to Save and Reuse API Responses with the Karate Framework

In the world of API automation testing, the ability to save responses from one request and utilize them in another is vital for creating seamless tests. For those using the Karate framework, this is not just a possibility; it's an essential feature that enhances test efficiency. In this guide, we will explore how to save the response from one request and use it in subsequent requests with practical examples to guide you along the way.

The Problem Statement

When testing APIs, you might often find yourself needing to capture data from one request to validate or use in another. For instance, consider a scenario where:

You send user credentials (username and user ID) in the body of one request.

The API responds with the user’s address.

You then need to validate the type of house at that address in a subsequent request.

This raises the question: Is it possible to save the response from the first request and use it in the body of a second request in Karate?

The Solution: Yes, It’s Possible!

Certainly, Karate provides a straightforward way to achieve this. Below, we break down the process step-by-step, highlighting essential concepts that will make your testing scripts clearer and more effective.

Step 1: Setup Your API Requests

Firstly, you need to define the URL and perform the initial request. Here’s how you can do it:

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In this step, we are sending a GET request to the API, and we expect a 200 status response, indicating that the request was successful.

Step 2: Save the Response

After making the request, you need to capture a specific part of the response. In our example, we want to store a value from the returned JSON:

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Here, myResult is now holding the value associated with myKey from the JSON response.

Step 3: Use the Saved Response in Another Request

Now that we have our data saved, the next step is to use it in a new request. This can be done as follows:

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

In this step, we extend the path, appending the previously saved myResult. As a result, the second request effectively utilizes the response from the first request.

Example in Action

For clarity, here is the complete example in one snippet:

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

In this code snippet:

We first send a request and retrieve the desired value.

We then use that value to construct the URL for a second request, which ensures that our automations are dynamic and context-aware.

Conclusion

In conclusion, the Karate framework makes it remarkably simple to save responses from one API request and leverage that data in subsequent requests. By following a few straightforward steps, you can enhance your test automation scripts, making them more efficient and effective. So the next time you're working with APIs in Karate, remember this useful technique to ensure your tests harness the full potential of the API responses.

Take your API testing to the next level and start integrating response values today! Your future self will thank you for it!