@Test
public void loadNativeAd_withInvalidClassName_shouldNotifyListenerOfOnNativeAdFailedAndReturn() throws Exception {

    testHttpResponseWithHeaders.addHeader(ResponseHeader.CUSTOM_EVENT_NAME.getKey(), "com.mopub.baaad.invalidinvalid123143");
    downloadResponse = new DownloadResponse(testHttpResponseWithHeaders);
    CustomEventNativeAdapter.loadNativeAd(context, localExtras, downloadResponse, mCustomEventNativeListener);
    verify(mCustomEventNativeListener).onNativeAdFailed(NativeErrorCode.NATIVE_ADAPTER_NOT_FOUND);
    verify(mCustomEventNativeListener, never()).onNativeAdLoaded(any(NativeAdInterface.class));
    verify(mCustomEventNative, never()).loadNativeAd(context, mCustomEventNativeListener, localExtras, serverExtras);
}