Karate already offers so many built-in features and functionality that it is impossible to cover everything in one book. However, sometimes it can be necessary to add more custom functionality to it. This typically happens if there are different data sources involved in test cases that go beyond APIs, or if test cases deal with data formats that Karate does not support natively.

Also, depending on your use case, mocking certain data might be required to not depend on third-party provider availability. Luckily, there are mechanisms to deal with all of this in a straightforward way.

Until now, we have written mostly shorter test scenarios that are not too hard to maintain in the long run. Typically, test suites can get very big the more test cases are added and coverage is achieved. Therefore, it is necessary to think about how to keep tests short, concise, and maintainable. Plus, this has the added benefit of increased understandability...