/**
 * Normalizes full-width alphanumeric characters to half-width alphanumeric characters.
 */
public class FullWidthToHalfWidthAlphabetNormalizer implements Normalizer {
    /**
     * Constructs a new {@link FullWidthToHalfWidthAlphabetNormalizer}.
     */
    public FullWidthToHalfWidthAlphabetNormalizer() {
        // nothing
    }

    @Override

    @Test
    public void test_constructor() throws Exception {
        FullWidthToHalfWidthAlphabetNormalizer normalizer = new FullWidthToHalfWidthAlphabetNormalizer();
        assertNotNull(normalizer);
    }

    @Test
    public void test_lowercaseAlphabet() throws Exception {
        FullWidthToHalfWidthAlphabetNormalizer normalizer = new FullWidthToHalfWidthAlphabetNormalizer();

        chain.add(new FullWidthToHalfWidthAlphabetNormalizer());

        String result = chain.normalize("ａｂｃ", "field");

        assertEquals("abc", result);
    }

    @Test
    public void test_multipleNormalizers() throws Exception {
        NormalizerChain chain = new NormalizerChain();
        chain.add(new FullWidthToHalfWidthAlphabetNormalizer());
        chain.add(new HankakuKanaToZenkakuKana());