Clone this repo:
  1. 0f1a44a Merge pull request #5659 from robolectric/piper_228751758 by brettchabot · 8 days ago master
  2. b03037b Merge branch 'master' into piper_228751758 by brettchabot · 8 days ago
  3. b36c6e1 Merge pull request #5657 from robolectric/piper_311230059 by brettchabot · 8 days ago
  4. 24b15de Implement BluetoothLeScanner by xlythe · 9 days ago
  5. 505cd4a Improve ExpectedLogMessagesRule output in the case that a message is expected, but not observed (and vice-versa). by Googler · 9 days ago

Build Status GitHub release

Robolectric is the industry-standard unit testing framework for Android. With Robolectric, your tests run in a simulated Android environment inside a JVM, without the overhead of an emulator.


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

public class MyActivityTest {

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

    Button button = (Button) activity.findViewById(;
    TextView results = (TextView) activity.findViewById(;

    assertThat(results.getText().toString(), 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


Starting a New Project

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


testImplementation "org.robolectric:robolectric:4.3.1"

Building And Contributing

Robolectric is built using Gradle. Both IntelliJ and Android Studio can import the top-level build.gradle file and will automatically generate their project files from it.

Robolectric supports running tests against multiple Android API levels. The work it must do to support each API level is slightly different, so its shadows are built separately for each. To build shadows for every API version, run:

./gradlew clean assemble install compileTest

Using Snapshots

If you would like to live on the bleeding edge, you can try running against a snapshot build. Keep in mind that snapshots represent the most recent changes on master and may contain bugs.


repositories {
    maven { url "" }

dependencies {
    testImplementation "org.robolectric:robolectric:4.4-SNAPSHOT"