3. Creating Spies and Partial Mocks

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MOCKITO COOKBOOK

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By: Grzejszczak

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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.

Preface

What this book covers

What you need for this book

Who this book is for

Conventions

Reader feedback

Customer support

Free Chapter

1. 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

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

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

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

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

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

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

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

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

Introduction

Mockito versus EasyMock

Mockito versus JMockit

Mockito versus JMock

Mockito versus Spock

Index

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MOCKITO COOKBOOK

By : Grzejszczak

MOCKITO COOKBOOK

By: Grzejszczak

Overview of this book

Creating spies in code

Getting ready

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MOCKITO COOKBOOK

By : Grzejszczak

MOCKITO COOKBOOK

By: Grzejszczak

Overview of this book

Creating spies in code

Getting ready

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