    @Test
    public void testDownloadClicked() throws Exception {

        presenter.onDownloadClicked();
        verify(contextHelper).startDownload(Constants.WORDNET);
        if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
            verify(controller).onDownloadClicked();
        } else {
            verify(controller, never()).onDownloadClicked();
        }
    }