6. Practicing Test-driven Development | Learning Android Application Testing

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Learning Android Application Testing

By : Paul Blundell

3.8 (4)

Learning Android Application Testing

3.8 (4)

By: Paul Blundell

Overview of this book

If you are an Android developer looking to test your applications or optimize your application development process, then this book is for you. No previous experience in application testing is required.

Preface

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 Testing

1. Getting Started with Testing

Why, what, how, and when to test?

Types of tests

Java testing framework

Android testing framework

Creating the Android project

Summary

2. Understanding Testing with the Android SDK

2. Understanding Testing with the Android SDK

The demonstration application

Assertions in depth

View assertions

Even more assertions

The TouchUtils class

Mock objects

The TestCase base class

The AndroidTestCase base class

Instrumentation

The InstrumentationTestCase class

The ActivityTestCase class

The ActivityInstrumentationTestCase2 class

The ProviderTestCase2 class

The ServiceTestCase

The TestSuiteBuilder.FailedToCreateTests class

Using libraries in test projects

Summary

3. Baking with Testing Recipes

3. Baking with Testing Recipes

Android unit tests

Testing activities and applications

Testing files, databases, and content providers

Testing exceptions

Testing local and remote services

Extensive use of mock objects

Testing views in isolation

Testing parsers

The parser test

Testing for memory usage

Testing with Espresso

Summary

4. Managing Your Android Testing Environment

4. Managing Your Android Testing Environment

Creating Android Virtual Devices

Running AVDs from the command line

Additional emulator configurations

Speeding up your AVD with HAXM

Alternatives to the AVD

Running monkey

Test scripting with monkeyrunner

Summary

5. Discovering Continuous Integration

5. Discovering Continuous Integration

Building Android applications manually using Gradle

Git – the fast version control system

Continuous integration with Jenkins

Summary

6. Practicing Test-driven Development

6. Practicing Test-driven Development

Getting started with TDD

Creating a sample project – the temperature converter

Creating a Java module

Creating the TemperatureConverterActivityTests class

Adding functionality

Viewing our final application

Summary

7. Behavior-driven Development

7. Behavior-driven Development

Given, When, and Then

FitNesse

GivWenZen

Summary

8. Testing and Profiling Performance

8. Testing and Profiling Performance

Ye Olde Logge method

Timing logger

Performance tests in Android SDK

Using the Traceview and dmtracedump platform tools

Dmtracedump

Microbenchmarks

Summary

9. Alternative Testing Tactics

9. Alternative Testing Tactics

Code coverage

Temperature converter code coverage

Introducing Robotium

Testing on the host's JVM

Introducing Robolectric

Google's march on shadows

Introducing Fest

Introducing Spoon

Introducing Fork

Summary

Index

Index

Adding functionality

The user interface is in place. Now, we can start adding some basic functionality. This functionality will include the code to handle the actual temperature conversion.

Temperature conversion

From the list of requirements, we can obtain this statement: When one temperature is entered in one field, the other one is automatically updated with the conversion.

Following our plan, we must implement this as a test to verify that the correct functionality is there. Our test would look something like this:

@UiThreadTest
public void testFahrenheitToCelsiusConversion() {
  celsiusInput.clear();
  fahrenheitInput.clear();
  fahrenheitInput.requestFocus();
  fahrenheitInput.setText("32.5");
  celsiusInput.requestFocus();
  double f = 32.5;
  double expectedC = TemperatureConverter.fahrenheitToCelsius(f);
  double actualC = celsiusInput.getNumber();
  double delta = Math.abs(expectedC - actualC);
  String msg = "" + f + "F -> " + expectedC + "C but was " 
    + actualC + "C (delta...

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