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Mockito Cookbook

By : Marcin Grzejszczak
Book Image

Mockito Cookbook

By: Marcin Grzejszczak

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Mockito Cookbook
Marcin Grzejszczak
Jun, 2014 | 284 pages
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Table of Contents (17 chapters)
Mockito Cookbook
Mockito Cookbook
Credits
Credits
About the Author
About the Author
About the Reviewers
About the Reviewers
www.PacktPub.com
www.PacktPub.com
Preface
Preface
Free Chapter
1
Getting Started with Mockito
Getting Started with Mockito
Introduction
Adding Mockito to a project's classpath
Getting started with Mockito for JUnit
Getting started with Mockito for TestNG
Mockito best practices – test behavior not implementation
Adding Mockito hints to exception messages (JUnit) (Experimental)
Adding additional Mockito warnings to your tests (JUnit) (Experimental)
2
Creating Mocks
Creating Mocks
Introduction
Creating mocks in code
Creating mocks with annotations
Creating mocks with a different default answer
Creating mocks with different default answers with annotations
Creating mocks with custom configuration
Creating mocks of final classes with PowerMock
Creating mocks of enums with PowerMock
3
Creating Spies and Partial Mocks
Creating Spies and Partial Mocks
Introduction
Creating spies in code
Creating spies with custom configuration
Creating spies using annotations
Creating partial mocks
Creating partial mocks of final classes with delegatesTo()
Creating spies of final classes with PowerMock
4
Stubbing Behavior of Mocks
Stubbing Behavior of Mocks
Introduction
Using argument matchers for stubbing
Stubbing methods that return values
Stubbing methods so that they throw exceptions
Stubbing methods so that they return custom answers
Stubbing methods so that they call real methods
Stubbing void methods
Stubbing void methods so that they throw exceptions
Stubbing void methods so that they return custom answers
Stubbing void methods so that they call real methods
Stubbing final methods with PowerMock
Stubbing static methods with PowerMock
Stubbing object instantiation using PowerMock
5
Stubbing Behavior of Spies
Stubbing Behavior of Spies
Introduction
Stubbing methods that return values
Stubbing methods so that they throw exceptions
Stubbing methods so that they return custom answers
Stubbing void methods
Stubbing void methods so that they throw exceptions
Stubbing void methods so that they return custom answers
Stubbing final methods with PowerMock
6
Verifying Test Doubles
Verifying Test Doubles
Introduction
Verifying the method invocation count with times()
Verifying the method invocation count with atLeast()
Verifying the method invocation count with atMost()
Verifying that interactions never happened
Verifying that interactions stopped happening
Verifying the order of interactions
Verifying interactions and ignoring stubbed methods
Verifying the method invocation within the specified time
7
Verifying Behavior with Object Matchers
Verifying Behavior with Object Matchers
Introduction
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
8
Refactoring with Mockito
Refactoring with Mockito
Introduction
Removing the problems with instance creation
Refactoring classes that do too much
Refactoring the classes that use the class casts
Refactoring the classes that use static methods
Refactoring the tests that use too many mocks
9
Integration Testing with Mockito and DI Frameworks
Integration Testing with Mockito and DI Frameworks
Introduction
Injecting test doubles instead of beans using Spring's code configuration
Injecting test doubles instead of beans using Spring's XML configuration
Injecting test doubles instead of beans using Springockito
Injecting test doubles instead of beans with Guice
Injecting test doubles instead of beans with Guice using Jukito
10
Mocking Libraries Comparison
Mocking Libraries Comparison
Introduction
Mockito versus EasyMock
Mockito versus JMockit
Mockito versus JMock
Mockito versus Spock
Index
Index

Creating mocks with different default answers with annotations

In the previous recipe, you have seen how to pass an implementation of the Answer interface to your mock to change its default behavior. In this recipe, we will focus on doing the same when creating mocks using annotations.

All versions of Mockito up until version 1.9.5 allow you to pass only elements of the Answers enum that delegate to answers present in the public Mockito API, as the arguments of the annotation. In the next Mockito release, there should be a possibility of passing a custom answer too, but until then it's not possible to do that.

Getting ready

In the following code, our system is a class that, based on the person's country, collects his Internal Revenue Service (IRS) address and formats it properly:

public class TaxFactorInformationProvider {

    private final TaxService taxService;

    public TaxFactorInformationProvider(TaxService taxService) {
        this.taxService = taxService;
    }

    public String...
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