Question 1

How do I convert a HAR file to a KATT test?

Accepted Answer

Use the command 'bin/katt from-har --apib -- <harfile.har> > output.apib' to generate an APIB blueprint. This leverages KATT's built-in conversion feature for creating tests from browser session logs.

Question 2

KATT vs Postman for API testing: which should I use?

Accepted Answer

KATT is better for Erlang-integrated, sequential testing in automated workflows, while Postman excels in GUI-based design and team collaboration. Choose KATT if you need code-driven validation and CLI automation.

Question 3

How to validate JSON arrays with KATT when order doesn't matter?

Accepted Answer

Use the 'set' extension in validators to ignore array order, as shown in the README. Define the array with {{type}}: 'set' to check for existence of items, and add {{unexpected}} to prevent extra elements.

Question 4

Can KATT handle authentication like OAuth tokens in tests?

Accepted Answer

Yes, but it requires custom implementation. Use runtime_value or runtime_validation extensions to generate tokens via Erlang/shell code, or modify request headers through callbacks for dynamic authentication.

Question 5

How to run KATT tests in a CI/CD pipeline like GitHub Actions?

Accepted Answer

Use the Docker image with commands like 'docker run --rm -v $PWD:$PWD -w $PWD ysoftwareab/katt -- test.apib'. Check exit codes for failures, and parameterize tests with CLI arguments for different environments.

Question 6

What are KATT's limitations compared to tools like RestAssured?

Accepted Answer

KATT lacks built-in support for Java ecosystems, parallel test execution, and rich assertion libraries without custom coding. It's more focused on Erlang and simple, sequential HTTP validation.

Question 7

Is KATT suitable for testing microservices with complex workflows?

Accepted Answer

It can handle sequential API calls within a microservice context, but for intricate service meshes or stateful interactions, you may need to extend it with custom callbacks or combine it with other tools.

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