Book Image

MOCKITO COOKBOOK

By : Grzejszczak
Book Image

MOCKITO COOKBOOK

By: Grzejszczak

Overview of this book

This is a focused guide with lots of practical recipes with presentations of business issues and presentation of the whole test of the system. This book shows the use of Mockito's popular unit testing frameworks such as JUnit, PowerMock, TestNG, and so on. If you are a software developer with no testing experience (especially with Mockito) and you want to start using Mockito in the most efficient way then this book is for you. This book assumes that you have a good knowledge level and understanding of Java-based unit testing frameworks.
Table of Contents (12 chapters)
11
Index

Creating custom Hamcrest matchers


In this recipe, we will create a custom Hamcrest matcher. Please refer to the previous recipe in terms of the presented assertions in the test because in the current recipe, we will combine them in our custom matchers.

Getting ready

For this recipe, our system under test will be a NewPersonGenerator class that will call an external service, NewIdentityCreator, to generate a new identity for the current person, as shown in the following code:

public class NewPersonGenerator {

    private final NewIdentityCreator newIdentityCreator;

    public NewPersonGenerator(NewIdentityCreator newIdentityCreator) {
        this.newIdentityCreator = newIdentityCreator;
    }

    public Person generateNewIdentity(Person person) {
        String newName = newIdentityCreator.createNewName(person);
        int newAge = newIdentityCreator.createNewAge(person);
        List<Person> newSiblings = newIdentityCreator.createNewSiblings(person);
        return new Person(newName...