when(delegate.hasNext()).thenReturn(true, true, false);
        when(delegate.next()).thenReturn(entry1, entry2);

        // Adapter that always throws
        FileEntryAdapterIterator iterator = new FileEntryAdapterIterator(parent, delegate, null) {
            @Override
            protected SmbResource adapt(FileEntry e) throws MalformedURLException {
                throw new MalformedURLException("Always fails");