When using Mockito 1.9.x I have been using Whiteboxto set values of fields to \"inject\" mocks. Se example below:
Whitebox
@Before public void setUp() {
You can use FieldSetter in Mockito2.x
import org.mockito.internal.util.reflection.FieldSetter; FieldSetter.setField(eventHandler,eventHandler.getClass().getDeclaredField("securityService"), securityService);