Writing API Tests with Karate: Enhance your API testing for improved security and performance

Description

Unlock the full potential of Karate with this comprehensive guide to effortlessly setup, write, run, optimize, and report test results Key Features Explore the capabilities of the Karate framework for effective software testing Learn how to integrate Karate tests into projects and CI/CD pipelines Explore lesser-known Karate modules such as Karate UI and Karate Gatling Book Description 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. What you will learn Understand the basic concepts of Karate and its functionality Integrate and use it effectively to solve your testing needs Extend Karate and customize its functionality for your use cases Explore different testing methods and their use cases Run your tests to check the software development lifecycle Get to know more about Karate's UI and performance test approaches Who this book is for This book is for QA engineers and developers who are familiar with APIs and want to make them safer and more secure by applying automated tests with the help of a lightweight and modern framework - Karate. Preface Part 1: Karate Basics 1 Introducing Karate’s Core Concepts Technical requirements What makes Karate stand out? Discovering Karate’s strong points Core features BDD versus Karate What is BDD? Glue code The Karate way Supported data types in Karate JSON GraphQL XML YAML CSV Other text-based formats Binary formats The JavaScript engine Java interoperability Summary 2 Setting up Your Karate Project Technical requirements Installing Java Setting the JAVA_HOME environment variable Getting to know Karate standalone Preparing the IDE Setting up Visual Studio Code Setting up IntelliJ IDEA Importing the example project Setting up Karate projects with Maven What is Maven? Installing Maven Adding Maven to the PATH variable Setting up a Karate project with the Maven archetype The roles of the different Karate project files Summary 3 Writing Basic Karate Tests Technical requirements Exploring the API under test The JSONPlaceholder API Creating a new Karate project Adding a new feature file Configuring test runs Adding a scenario Calling endpoints and setting parameters Setting a URL Specifying the HTTP method Separating the base URL from the path Setting query parameters Matching status codes and responses Matching the status code and type Making the test fail Using assertions and matchers on the response Exploring the response variable Handling nested JSON elements Asserting the number of elements with the length property Using matchers Making requests with payloads Using variables and data tables Using variables Using data tables Using a set Summary Running Karate Tests Technical requirements Running and debugging Karate tests through the IDE Running via CodeLens and the Karate CLI Debugging via CodeLens and Karate standalone Using the debug server Running tests with Maven Understanding Karate runners Running tests against different environments Using a custom property in a feature file Using Karate’s environment property Setting up karate-config.js Running specific tests Running specific runner class methods Running specific scenarios Filtering tests by tags Summary 5 Reporting and Logging Technical requirements Configuring log options Understanding log levels Changing the log level Suppressing print Using Karate’s built-in reports The different report pages Preserving old reports Deciding what to report Configuring third-party report libraries Setting the appropriate Karate options Using Cluecumber as a Maven plugin Technical requirements Using Cluecumber from a Karate runner Generating a Surefire report Surefire XML Using JUnit reports Summary Part 2: Advanced Karate Functionalities 6 More Advanced Karate Features Technical requirements Working with headers and cookies More about headers Setting headers More about cookies Using different configuration and run options Using the karate object for configuration and execution Request retries Using advanced tags Defining and using expressions with def Defining inline methods Using embedded expressions with JSON Using embedded expressions with XML Working with external files Understanding JSONPath and XPath Testing GraphQL Understanding GraphQL requests Exploring the mock API Using GraphQL in Karate Collecting data into a new array Summary 7 Customizing and Optimizing Karate Tests Technical requirements Using Karate hooks Implementing a new hook class Overriding handler methods Registering a hook class in the runner Running a test using the hook class Defining hooks inside feature files Defining and calling Java functions Understanding the basics Working with databases Using Karate as a mock server Authoring a mock scenario Firing up the mock server from within a test Using a standalone mock server Making your tests more concise Reducing code by calling other feature files Data-driven tests with scenario outline Avoiding code duplication with background scenarios Summary 8 Karate in Docker and CI/CD pipelines Technical requirements Triggering Karate tests from shell scripts Creating a batch script for Windows Creating a Bash script Running Karate tests in a Docker container Understanding Docker Installing Docker Starting and verifying a Docker installation Downloading a Docker image Running a Maven command in a Maven Docker container Running Karate tests inside a Maven Docker container Running our shell script inside Docker Customizing our tests Passing database credentials as system properties Using the system properties in the database connection class Passing parameters from Docker Environment variables Integrating Karate tests into GitHub workflows Understanding GitHub workflows Managing secrets Adding a GitHub workflow to a repository Setting up the Docker-based GitHub workflow Using Karate in a GitHub workflow without Docker Summary 9 Karate UI for Browser Testing Technical requirements What Karate UI is for Related testing capabilities Writing a basic Chrome scenario Opening a website in Chrome Finding and interacting with elements Understanding locators Knowing the different kinds of locators Determining element locators Interacting with elements Using interactions in a test scenario Making web element assertions Making web element list assertions Debugging UI tests Taking screenshots Highlighting elements Exporting PDFs Using the debugger Using karate.stop to pause execution Redirecting HTTP calls Investigating API requests Adding a mock response Configuring the mock Using the mock in a test Summary 10 Performance Testing with Karate Gatling Technical requirements Creating the test scenario What is Gatling? Setting up Karate Gatling Setting up Scala in VS Code Creating Maven profiles Running Karate tests as performance tests Creating a simulation Running the simulation Using tags Testing different simulations Gatling assertions Checking out Gatling reports Summary Index Other Books You May Enjoy