@Test
  public void destroy_shouldPreventOnCustomEventShownNotification() throws Exception {
    subject.destroy();

    subject.onCustomEventInterstitialShown();

    verify(interstitialAdListener, never()).onInterstitialShown(eq(subject));
  }
  @Test
  public void destroy_shouldPreventOnCustomEventInterstitialFailedNotification() throws Exception {
    subject.setInterstitialView(interstitialView);
    subject.destroy();

    subject.onCustomEventInterstitialFailed(UNSPECIFIED);

    verify(interstitialView, never()).loadFailUrl(UNSPECIFIED);
  }
  @Test
  public void destroy_shouldPreventOnCustomEventInterstitialClickedFromRegisteringClick()
      throws Exception {
    subject.setInterstitialView(interstitialView);
    subject.destroy();

    subject.onCustomEventInterstitialClicked();

    verify(interstitialView, never()).registerClick();
  }