}

    public void test_isAvailable() {
        // Test default implementation
        generator = new TestThumbnailGenerator();
        assertTrue(generator.isAvailable());
    }

    public void test_isTarget() {
        // Test isTarget method
        generator = new TestThumbnailGenerator();
        Map<String, Object> docMap = new HashMap<>();

        // Note: isTarget requires FessConfig which needs container

        assertTrue(emptyGenerator.isAvailable());
        // Test cached availability
        assertTrue(emptyGenerator.isAvailable());
    }

    public void test_isTarget() {
        // Initialize without container
        emptyGenerator = new EmptyGenerator();

        // Note: isTarget method requires FessConfig from ComponentUtil
        // which needs container initialization.

        System.out.println(result);
        assertThat(converter.getAsString(result), is("2008/12/31 12:34:56"));
    }

    /**
     * @throws Exception
     */
    @Test
    public void testIsTarget() throws Exception {
        final TimestampConverter converter = new TimestampConverter("yyyy/MM/dd");
        assertThat(converter.isTarget(java.sql.Timestamp.class), is(true));

        System.out.println(result);
        assertThat(converter.getAsString(result), is("2008/01/16"));
    }

    /**
     * @throws Exception
     */
    @Test
    public void testIsTarget() throws Exception {
        final DateConverter converter = new DateConverter("yyyy/MM/dd");
        assertThat(converter.isTarget(Date.class), is(true));
        assertThat(converter.isTarget(Timestamp.class), is(not(true)));

        System.out.println(result);
        assertThat(converter.getAsString(result), is("12:34:56"));
    }

    /**
     * @throws Exception
     */
    public void testIsTarget() throws Exception {
        final TimeConverter converter = new TimeConverter("yyyy/MM/dd");
        assertThat(converter.isTarget(java.sql.Time.class), is(true));

        System.out.println(result);
        assertThat(converter.getAsString(result), is("2008/01/16"));
    }

    /**
     * @throws Exception
     */
    @Test
    public void testIsTarget() throws Exception {
        final SqlDateConverter converter = new SqlDateConverter("yyyy/MM/dd");
        assertThat(converter.isTarget(java.sql.Date.class), is(true));

        assertThat(converter.getAsString(Integer.valueOf("100")), is("100"));
    }

    /**
     * @throws Exception
     */
    @Test
    public void testIsTarget() throws Exception {
        final NumberConverter converter = new NumberConverter("##0");
        assertThat(converter.isTarget(Integer.class), is(true));
        assertThat(converter.isTarget(Timestamp.class), is(not(true)));