Hands-On Introduction to the Java Testing Ecosystem

This repository contains the source code for the book 30 Testing Tools & Libraries Every Java Developer Must Know.

You can find the source code for the various testing tools & libraries within spring-boot-example/src/test/java/de/rieckpil/blog. Each tool & library has its dedicated Java package.

The only exception to this rule is MicroShed Testing, which is part of the jakarta-ee-example project.

Current Status: 20/30 tools and libraries are covered. The final release (30/30) is scheduled for Q1 2024.

Grab your copy here.

Goals of the Book

• Enrich your existing testing toolbox
• Use the right tool for the job
• Inform about various tools & libraries of the Java testing ecosystem
• Cookbook-style introduction for each testing tool & library
• Hands-on testing examples that apply for testing any Java application

Build & Test

Requirements:

• Java 11: java -version
• A running Docker engine (required for Testcontainers): docker info

Build the project and run all tests with:

cd spring-boot-example
./mvnw verify

cd jakarta-ee-example
./mvnw verify

Content

The book uses a Spring Boot and Jakarta EE application to demonstrate the different tools & libraries. Both sample applications only use a minimal subset of Spring Boot/Jakarta EE features so that you can easily apply the knowledge to your tech stack.

Test Frameworks

• [x] JUnit 4
• [x] JUnit 5
• [x] TestNG
• [x] Spock
• [ ] ...

Assertion Libraries

• [x] AssertJ
• [x] JsonPath
• [x] Hamcrest
• [x] XMLUnit
• [x] JSONAssert
• [x] REST Assured
• [ ] ...

Mocking Frameworks

• [x] Mockito
• [x] WireMock
• [x] MockWebServer
• [ ] PowerMock
• [ ] ...

Test Infrastructure

• [x] Testcontainers
• [x] LocalStack
• [x] MicroShed Testing
• [ ] Citrus
• [x] GreenMail
• [ ] Selenium
• [ ] ...

Utility Libraries

• [x] Selenide
• [ ] Pact (upcoming)
• [ ] Spring Cloud Contract (upcoming)
• [ ] Diffblue
• [ ] FitNesse
• [ ] Awaitility (upcoming)
• [ ] ...

Performance Testing

• [ ] JMH (upcoming)
• [ ] JMeter (upcoming)
• [x] Gatling
• [ ] Quick Perf
• [x] ApacheBench
• [ ] ...