Book Image

Writing API Tests with Karate

By : Benjamin Bischoff
Book Image

Writing API Tests with Karate

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.

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Table of Contents (15 chapters)
Preface
Preface
Who this book is for
What this book covers
To get the most out of this book
Download the example code files
Download the color images
Conventions used
Get in touch
Share Your Thoughts
Download a free PDF copy of this book
1
Part 1:Karate Basics
Part 1:Karate Basics
Free Chapter
2
Chapter 1: Introducing Karate’s Core Concepts
Chapter 1: Introducing Karate’s Core Concepts
Technical requirements
What makes Karate stand out?
BDD versus Karate
Supported data types in Karate
The JavaScript engine
Java interoperability
Summary
3
Chapter 2: Setting up Your Karate Project
Chapter 2: Setting up Your Karate Project
Technical requirements
Installing Java
Getting to know Karate standalone
Preparing the IDE
Setting up Karate projects with Maven
The roles of the different Karate project files
Summary
4
Chapter 3: Writing Basic Karate Tests
Chapter 3: Writing Basic Karate Tests
Technical requirements
Exploring the API under test
Creating a new Karate project
Calling endpoints and setting parameters
Matching status codes and responses
Using assertions and matchers on the response
Making requests with payloads
Using variables and data tables
Using data tables
Summary
5
Chapter 4: Running Karate Tests
Chapter 4: Running Karate Tests
Technical requirements
Running and debugging Karate tests through the IDE
Running tests with Maven
Running tests against different environments
Running specific tests
Filtering tests by tags
Summary
6
Chapter 5: Reporting and Logging
Chapter 5: Reporting and Logging
Technical requirements
Configuring log options
Using Karate’s built-in reports
Configuring third-party report libraries
Generating a Surefire report
Using JUnit reports
Summary
7
Part 2:Advanced Karate Functionalities
Part 2:Advanced Karate Functionalities
8
Chapter 6: More Advanced Karate Features
Chapter 6: More Advanced Karate Features
Technical requirements
Working with headers and cookies
Using different configuration and run options
Defining and using expressions with def
Working with external files
Understanding JSONPath and XPath
Testing GraphQL
Summary
9
Chapter 7: Customizing and Optimizing Karate Tests
Chapter 7: Customizing and Optimizing Karate Tests
Technical requirements
Using Karate hooks
Defining and calling Java functions
Using Karate as a mock server
Making your tests more concise
Summary
10
Chapter 8: Karate in Docker and CI/CD pipelines
Chapter 8: Karate in Docker and CI/CD pipelines
Technical requirements
Triggering Karate tests from shell scripts
Running Karate tests in a Docker container
Customizing our tests
Integrating Karate tests into GitHub workflows
Summary
11
Chapter 9: Karate UI for Browser Testing
Chapter 9: Karate UI for Browser Testing
Technical requirements
What Karate UI is for
Writing a basic Chrome scenario
Finding and interacting with elements
Debugging UI tests
Redirecting HTTP calls
Summary
12
Chapter 10: Performance Testing with Karate Gatling
Chapter 10: Performance Testing with Karate Gatling
Technical requirements
What is Gatling?
Setting up Karate Gatling
Running Karate tests as performance tests
Checking out Gatling reports
Summary
13
Index
Index
Why subscribe?
14
Other Books You May Enjoy
Other Books You May Enjoy
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Debugging UI tests

In Chapter 4, Running Karate Tests, we saw Karate’s powerful debugging features in combination with VS Code. We will now see that we can also use the same techniques when dealing with browser tests.

Note that these are techniques and approaches that can be used in all supported browsers. If you want to know more options that are specific to the target browser and driver in use—for example, video recording with the Karate Docker image—please refer to this section of the official documentation: https://github.com/karatelabs/karate/tree/master/karate-core#configure-drivertarget.

Let’s now explore which debugging options Karate offers to simplify and speed up browser test development.

Taking screenshots

Karate will automatically take a screenshot if a test fails. This screenshot is automatically attached to the test report and can be seen by clicking on the failed step of the test. This makes it easier to debug the cause of the...

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