}

    @Nested
    @DisplayName("Integration Tests")
    class IntegrationTests {

        @Test
        @DisplayName("Should handle complete copy operation with multiple chunks")
        void testCompleteCopyOperation() {
            // Given
            byte[] sourceKey = new byte[SOURCE_KEY_SIZE];
            for (int i = 0; i < SOURCE_KEY_SIZE; i++) {
                sourceKey[i] = (byte) (0xA0 + i);
            }