The document serves as a survival guide for using Robolectric, an Android testing framework, covering its history, setup, and key testing strategies. It highlights the framework's ability to parse resources, intercept loading Android classes, and the importance of dependency injection using Roboguice. Additionally, it notes the drawbacks of Robolectric, including documentation issues and performance concerns during testing.

1. Robolectric Survival Guide

2. eBuddy
• 2009 Chat (IM)
• 2011 XMS
• 2012 We started with Robolectric
ANDROID PRODUCTS HISTORY

3. Android!

4. Relationships
• Java
• Maven
• Android
• Unit tests

5. First Android JUnit Test
import org.junit.Before;
import org.junit.Test;
import static org.fest.assertions.api.Assertions.assertThat;
public class MainActivityTest {
private MainActivity activity;
@Before public void setUp () throws Exception
{
activity = new MainActivity();
activity.onCreate( null );
}
@Test public void checkInitialTexts () throws Exception
{
assertThat( activity.downloadButton.getText() ).isEqualTo( "Download" );
}
}

6. First Android JUnit Test

7. Android Testing Options
• No tests
• POJO
• Instrumental tests
• Android sources
• Mock Android
• Robolectric!

8. What is inside
• Parses resources
• Intercepts loading Android
classes
• Rewrites method bodies
with Javassist
• Binds shadow objects to
new Android objects
• Proxies modified objects

9. First Robolectric Test

10. Key Points from Demo #1
• Correct path to SDK in the
local.properties
• JUnit dependency before
Android (IntelliJ IDEA)
• @RunWith(
RobolectricTestRunner.class)

11. Biggest Issue of Robolectric
• Lack of documentation
• Not many examples
• Unscheduled releases
• http://robolectric.blogspot.nl/
2011/02/how-to-work-on-
robolectric-in-parallel.html

12. Robolectric Drawbacks
• Sometimes magic
• PowerMock integration
• Time of run for the first test

13. Shadowing
• http://robolectric.blogspot.nl/2
011/01/how-to-create-your-
own-shadow-classes.html
• Bind shadow class
• Use own Runner instead of
Robolectric
• (Submit pull request)

14. Dependency Injection

15. RoboGuice 2.0
public class MainActivity extends RoboActivity implements View.OnClickListener
{
@Inject Bus bus;
@Override public void onCreate( Bundle savedInstanceState )
{
bus.register( this );
}
@Override public void onClick( View view )
{
bus.post( new DownloadDataEvent( urlInput.getText().toString() ) );
}
}

16. RoboGuice 2.0

17. Key Points from Demo #2
• InjectingTestRunner
• Own AbstractModule
implementation
• Run injections before
every test method

18. Android Real Jar (Robolectric 2.0)
• http://robolectric.blogspot.nl
/2011/08/using-robolectric-
with-real-android.html
• Robolectric 2.0 alpha

19. Robolectric or not Robolectric
• Not a question for me
• Follow industry

20. Thank you!