public void testInit() throws IOException {
        // Test init method (should do nothing)
        converter.init();
        // No exception should be thrown
    }

    @Test
    public void testConvertWithNoLanguages() throws IOException {
        // Test convert with no languages specified
        String text = "test text";
        String field = "content";

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

        assertEquals("TEST_en", readings.get(0));
        assertEquals("TEST_ja", readings.get(1));
        assertEquals("TEST_fr", readings.get(2));
    }

    @Test
    public void testConvertWithNoLanguages() throws IOException {
        // Test convert with no languages specified
        converter.init();
        String text = "test";
        String field = "content";