@Test
    @DisplayName("Should convert hex chars correctly")
    void testToHexChars() {
        // Test integer conversion
        char[] dst1 = new char[8];
        Hexdump.toHexChars(0x1234ABCD, dst1, 0, 8);
        assertEquals("1234ABCD", new String(dst1));

        // Test with smaller size
        char[] dst2 = new char[4];
        Hexdump.toHexChars(0xABCD, dst2, 0, 4);
        assertEquals("ABCD", new String(dst2));

        assertEquals("１２３ あいう", normalizeText("　１２３　あいう　", 100, -1, 2, false));
        assertEquals("123 abc", normalizeText(" 123\nabc ", 100, -1, 2, false));
        assertEquals("123abc", normalizeText(" 123abc ", 100, -1, 2, false));

        assertEquals("!!", normalizeText("!!!", 100, -1, 2, false));
        assertEquals("//", normalizeText("///", 100, -1, 2, false));