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@SmallTest
@RunWith(AndroidJUnit4.class)
public class MainActivityTest {

    @Rule
    public ActivityTestRule<MainActivity> mActivityRule =
            new ActivityTestRule<>(MainActivity.class, true, false);

    @Test
    public void someTest() {
        Context targetContext = InstrumentationRegistry.getInstrumentation()
            .getTargetContext();
        Intent intent = new Intent(targetContext, MainActivity.class);
        intent.putExtra("Name", "Value");

        mActivityRule.launchActivity(intent);

        /* Your activity is initialized and ready to go. */ 
    }
}