queryCommand.setLowercaseWildcard(true);

        assertEquals("testcase", queryCommand.toLowercaseWildcard("TestCase"));
        assertEquals("test_case", queryCommand.toLowercaseWildcard("Test_Case"));
        assertEquals("test-case", queryCommand.toLowercaseWildcard("Test-Case"));
    }

    @Test
    public void test_toLowercaseWildcard_internationalCharacters() {

        chain.add((text, field, langs) -> text.replace(" ", "_"));

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

        assertEquals("test_case", result);
    }

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