@Test
public void destroy_shouldPreventJavascriptInterfaceFromNotifyingListener() throws Exception{

    subject.init(customEventInterstitialListener, isScrollable, clickthroughUrl, redirectUrl);
    Object javascriptInterface = shadowOf(subject).getJavascriptInterface(MOPUB_JS_INTERFACE_NAME);
    assertThat(javascriptInterface).isNotNull();
    subject.setIsDestroyed(true);
    Method fireFinishLoad = javascriptInterface.getClass().getDeclaredMethod("fireFinishLoad");
    fireFinishLoad.invoke(javascriptInterface);
    verify(customEventInterstitialListener, never()).onInterstitialLoaded();
}