Mockito Cookbook

Chapter 7. Verifying Behavior with Object Matchers

In this chapter, we will cover the following recipes:

• Using Hamcrest matchers for assertions
• Creating custom Hamcrest matchers
• Using Hamcrest matchers for stubbing and verification
• Using AssertJ for assertions
• Creating custom AssertJ assertions
• Capturing and asserting the argument

Introduction

In this chapter, you will learn how to use both Hamcrest matchers (https://github.com/hamcrest/JavaHamcrest) and AssertJ assertions (http://joel-costigliola.github.io/assertj/assertj-core.html) in order to properly check the output of your system under test. Now, let's take a quick look at both of the libraries and check their pros and cons.

Hamcrest is a library that is incorporated inside one of the most frequently ...