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Writing API Tests with Karate

Writing API Tests with Karate

By : Benjamin Bischoff
5 (8)
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Writing API Tests with Karate

Writing API Tests with Karate

5 (8)
By: Benjamin Bischoff

Overview of this book

Software in recent years is moving away from centralized systems and monoliths to smaller, scalable components that communicate with each other through APIs. Testing these communication interfaces is becoming increasingly important to ensure the security, performance, and extensibility of the software. A powerful tool to achieve safe and robust applications is Karate, an easy-to-use, and powerful software testing framework. In this book, you’ll work with different modules of karate to get tailored solutions for modern test challenges. You’ll be exploring interface testing, UI testing as well as performance testing. By the end of this book, you’ll be able to use the Karate framework in your software development lifecycle to make your APIs and applications robust and trustworthy.
Table of Contents (15 chapters)
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1
Part 1:Karate Basics
7
Part 2:Advanced Karate Functionalities

Using assertions and matchers on the response

So far, we are not really doing any testing concerning the returned data but only the status code. To fulfill the title of our scenario (Checking user-specific posts), we must add at least one other step with an assertion so this can be a real test.

JSON examples

All examples in this chapter apply to JSON data since this is the most common REST API request-and-response format. For XML-based APIs, the shown approaches are almost identical. More on working with matchers on XML data can be found here: https://github.com/karatelabs/karate#xpath-functions.

From our API exploration and its documentation, we know that the endpoint in use returns a list of posts where each one has a userId that should be equal to the one that we pass via the request parameter. Additionally, it has an id that can identify each post, title, and body. The following is an example structure of a posts resource:

{
    "userId&quot...

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