### Question:
CodeReviewRequestListener implements BackgroundTaskListener { @Override public void onBegin() { } CodeReviewRequestListener(CodeReviewRequestTask task, IdeUIInvoker uiInvoker); @Override void onBegin(); @Override void onSuccess(); @Override void onFailure(); @Override void onInterruption();  }### Answer:
@Test public void doNothingOnBegin() { listener.onBegin(); verifyNoMoreInteractions(task, invoker); }