assertNotNull(results);
        // With multiple languages, should use ReadingConverterChain
    }

    @Test
    public void testConvertWithEmptyText() throws IOException {
        // Test convert with empty text
        String text = "";
        String field = "content";

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

        assertNotNull(readings);
        assertEquals(1, readings.size());
        assertEquals("HELLO WORLD", readings.get(0));
    }

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