How to Validate JSON Attribute Responses in Karate When Keys are Numbers

Learn how to effectively validate the `clientName` attribute in JSON using Karate, focusing on scenarios where keys are numerical values.
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This video is based on the question https://stackoverflow.com/q/67563689/ asked by the user 'NoNoNo' ( https://stackoverflow.com/u/12904248/ ) and on the answer https://stackoverflow.com/a/67563867/ 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 Validate JSON Attribute Responses in Karate When Keys are Numbers

Working with JSON data in testing frameworks can sometimes introduce unique challenges, especially when it comes to validating data with numerical keys. In this guide, we'll explore how to handle such scenarios using the Karate framework effectively, ensuring your tests are both accurate and reliable.

The Problem: Validating JSON with Numerical Keys

Suppose you have a JSON payload that looks like this:

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

You need to validate the clientName attribute for the key 1. However, if you try to use the syntax * match payload.1.clientName == 'Peter Thomas', you may encounter an error because the key 1 is treated as a number, leading to unexpected results in Karate.

The Solution

To validate JSON attributes with numerical keys in Karate, you need to use the correct syntax for accessing these keys. Let's break this down step by step.

1. Use the Correct Key Access Method

In order to access an attribute when the key is a string that represents a number (like "1"), you should use square bracket notation. This is crucial, as directly using dot notation may lead to errors.

Example Code

Here’s how you can define your payload and match the clientName properly:

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

2. Ensure Your Karate Version is Updated

If you find that the above code doesn’t work, it might be due to an outdated version of Karate. Make sure you are using at least Karate version 1.0.1. Updating your Karate framework can resolve many compatibility issues.

3. Testing Other Values

You can similarly validate other clientName values by applying the same principle. For instance, if you want to check the clientName for key 2, simply replace ['1'] with ['2']:

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

Conclusion

Validating JSON attributes with numerical keys in Karate is straightforward once you know the right syntax. By using square brackets for key access, you can easily avoid errors and maintain the integrity of your tests. Always ensure that you are on the latest version of Karate to leverage all its features and improvements.

Now you're equipped to efficiently validate JSON attributes in your testing endeavors. Happy testing with Karate!

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