Robolectric

Robolectric is a testing framework that de-fangs the Android SDK so you can test-drive the development of your Android app.

Usage

Here's an example of a simple test written using Robolectric:

@RunWith(RobolectricTestRunner.class)
public class MyActivityTest {

  @Test
  public void clickingButton_shouldChangeResultsViewText() throws Exception {
    Activity activity = Robolectric.setupActivity(MyActivity.class);

    Button pressMeButton = (Button) activity.findViewById(R.id.press_me_button);
    TextView results = (TextView) activity.findViewById(R.id.results_text_view);

    pressMeButton.performClick();
    String resultsText = results.getText().toString();
    assertThat(resultsText, equalTo("Testing Android Rocks!"));
  }
}

For more information about how to install and use Robolectric on your project, extend its functionality, and join the community of contributors, please visit http://robolectric.org.

Install

Starting a new project

If you'd like to start a new project with Robolectric you can use deckard (for either maven or gradle). These project will guide you through setting up both Android and Robolectric on your machine.

Current project

Alternatively, you can install Robolectric for your current project by adding the following to your pom.xml:

<dependency>
   <groupId>org.robolectric</groupId>
   <artifactId>robolectric</artifactId>
   <version>2.3</version>
   <scope>test</scope>
</dependency>

Robolectric requires the Google APIs for Android (specifically, the maps JAR) and Android support-v4 library. To download this onto your development machine use the Android SDK tools and then run the following to install them to your local Maven repository:

mvn install:install-file -DgroupId=com.google.android.maps \
  -DartifactId=maps \
  -Dversion=18_r3 \
  -Dpackaging=jar \
  -Dfile="$ANDROID_HOME/add-ons/addon-google_apis-google-18/libs/maps.jar"

mvn install:install-file -DgroupId=com.android.support \
  -DartifactId=support-v4 \
  -Dversion=19.0.1 \
  -Dpackaging=jar \
  -Dfile="$ANDROID_HOME/extras/android/support/v4/android-support-v4.jar"

You will need to either replace or have ANDROID_HOME set to your local Android SDK for Maven to be able to install the jar.

Building And Contributing

Robolectric can be built using either Maven or Ant. Both Eclipse (with the M2Eclipse plug-in) and IntelliJ can import the pom.xml file and will automatically generate their project files from it.