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());

        // Test with different parameters
        int[][] testCases = { { 0, 10 }, { 5, 20 }, { 50, 50 }, { 0, 0 } };

        for (int[] testCase : testCases) {
            // Arrange
            byte[] buffer = new byte[100];
            int bufferIndex = testCase[0];
            int len = testCase[1];

            // Act

Shinsuke Sugaya <******@****.***> 1444529815 +0900

    }

    @Test
    public void testVariousFieldValues() {
        int[][] testCases = { { 0, 0, 0 }, { 100, 200, 300 }, { 32767, 32767, 32767 }, { 65535, 65535, 65535 } };

        for (int[] testCase : testCases) {
            int serverType = testCase[0];
            int proximity = testCase[1];
            int ttl = testCase[2];

            ByteBuffer bb = ByteBuffer.wrap(testBuffer).order(ByteOrder.LITTLE_ENDIAN);

Shinsuke Sugaya <******@****.***> 1444529815 +0900

Shinsuke Sugaya <******@****.***> 1444529815 +0900

Shinsuke Sugaya <******@****.***> 1444529815 +0900

Shinsuke Sugaya <******@****.***> 1444529815 +0900

Shinsuke Sugaya <******@****.***> 1444529815 +0900

Shinsuke Sugaya <******@****.***> 1444529815 +0900