TestApp.java

public class TestApp extends OurApp {

    @Override
    protected void createComponents() {
        OurTestComponent component = mock(OurTestComponent.class);
        // fixed the memory leak by using a plain stub (without invocation tracking)
        OurActivityLifecycleCallbacks callbacks =
                mock(OurActivityLifecycleCallbacks.class, withSettings().stubOnly());
        when(component.activityLifecycleCallbacks()).thenReturn(mock(callbacks));
        OurApp.setComponent(component);
    }

}