assertNotNull(results);
        assertTrue(results.isEmpty() || (results.size() == 1 && results.get(0).isEmpty()));
    }

    @Test
    public void testConvertWithNullText() throws IOException {
        // Test convert with null text - this might throw exception
        String text = null;
        String field = "content";

        try {

        List<String> readings = converter.convert(text, field, "en");

        assertNotNull(readings);
        assertTrue(readings.isEmpty());
    }

    @Test
    public void testConvertWithNullText() throws IOException {
        // Test convert with null text
        converter.init();
        String text = null;
        String field = "content";