Скачать или смотреть How to Call Features in Karate for Context Modification and Variable Return

Learn how to effectively call features in Karate while allowing context modification and variable return for better test management.
---
This video is based on the question https://stackoverflow.com/q/63495696/ asked by the user 'italktothewind' ( https://stackoverflow.com/u/3389507/ ) and on the answer https://stackoverflow.com/a/63497937/ 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.

Visit these links for original content and any more details, such as alternate solutions, latest updates/developments on topic, comments, revision history etc. For example, the original title of the Question was: Karate: call feature with result and share context

Also, Content (except music) licensed under CC BY-SA https://meta.stackexchange.com/help/l...
The original Question post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license, and the original Answer post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license.

If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com.
---
How to Call Features in Karate for Context Modification and Variable Return

If you're working with Karate, a popular framework for API testing, you might encounter scenarios where you need to call features from other features while managing context and returning variables. This can lead to some confusion on how to achieve both goals effectively. In this guide, we will explore the nuances of how to call one feature from another and ensure that you're able to modify the context while also retrieving variables as needed.

Understanding the Problem

When using Karate, you may run into a situation where you want to call Feature A from Feature B. The primary concern arises around the following two methods:

Calling without a return value: When you use the syntax call read(A.feature), this allows Feature A to modify attributes in Feature B, like cookies or other context variables.

Calling with a return value: By using def variable = call read(A.feature), you can store the result in a variable, but this method restricts Feature A from altering the context of Feature B.

This poses the question: How can you call Feature A from Feature B to get a variable while also modifying the context in Feature B?

The Solution: Making Context Global

Karate provides a straightforward way to achieve this by leveraging the concept of global context. Here's how it can be done:

Key Points to Remember

Global Context Modification: When you make changes in Feature A, those modifications will be available to Feature B as long as you do not assign the call to a variable. Essentially, the changes become globally accessible.

No Need for Return: You don’t necessarily need to return values from Feature A unless you explicitly need a return to manage within Feature B.

Step-by-Step Approach

Modify Context in Feature A: When you want to modify variables (like cookies), simply call Feature A without capturing the return value in Feature B:

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

Changes made in Feature A will impact Feature B directly.

Global Variables are Accessible: Any variables defined in Feature A will now be available globally, and you can access these variables directly in Feature B.

Example Scenario

Suppose Feature A modifies a cookie as follows:

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

Then, in Feature B, you would simply call:

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

Final Note

If the solution provided does not align with what you are trying to accomplish, it’s important to recognize that Karate may not support the exact feature calling and context modification design you envision.

Conclusion

In summary, achieving both variable returns and context modifications in Karate can be mastered with an understanding of how global variables work. By simply calling the feature without assignment, you can leverage the modifications made in that feature effectively within your tests.

By employing these strategies, you'll enhance your Karate test management skills, making your scripts cleaner and more organized.

Now, go ahead and implement this methodology to streamline your testing process in Karate!