assertEquals(size * 2, result.length()); // Each byte becomes 2 hex chars
    }

    @Test
    @DisplayName("Should format with specific offset and length")
    void testHexdumpWithOffsetAndLength() {
        // Given
        byte[] data = createTestData(64);
        int offset = 16;
        int length = 32;

        // When
        String result = Hexdump.toHexString(data, offset, length);

Shinsuke Sugaya <******@****.***> 1755149504 +0900