//
    /**
     * Copies from an input stream to an output stream.
     * <p>
     * Neither the input stream nor the output stream is closed.
     * </p>
     *
     * @param in the input stream (must not be {@literal null})
     * @param out the output stream (must not be {@literal null})
     * @return the number of bytes copied
     */

        }
    }

    /**
     * Copies the source Bean to a new instance of the destination Bean and returns it.
     *
     * @param <T> The type of the destination Bean.
     * @param src The source Bean. Must not be {@literal null}.
     * @param destClass The type of the destination Bean. Must not be {@literal null}.
     * @return The newly copied Bean.
     */

     * If either or both arrays have a length of {@literal 0}, the other array is returned as is.
     * In any case, the returned array is the same instance as the argument array and is not copied.
     * </p>
     *
     * @param <T>
     *            the type of the array elements
     * @param a
     *            first array
     * @param b
     *            second array

        // In test environments, getSubject() may return null if JAAS is not configured
        // This is acceptable behavior - the test should focus on the cloning logic

        // Clone and verify basic fields copied
        JAASAuthenticator copy = (JAASAuthenticator) orig.clone();
        assertEquals(orig.getUsername(), copy.getUsername());
        assertEquals(orig.getUserDomain(), copy.getUserDomain());

    }

    /**
     * Returns a {@link CopyOptions} with the specified prefix.
     * <p>
     * When a prefix is specified, only the properties from the source whose names start with the prefix will be copied.
     * Additionally, the prefix will be removed from the source property names to determine the target property names.
     * </p>
     *
     * @param prefix

     * the property names for the source and destination will be as follows:
     * </p>
     * <table border="1">
     * <caption>Copied JavaBeans Properties</caption>
     * <tr>
     * <th>JavaBeans Property Name</th>
     * <th>{@literal Map} Property Name</th>
     * </tr>
     * <tr>
     * <td>{@literal foo}</td>

        assertEquals(dataLength, response.getDataLength());
        assertEquals(dataRemaining, response.getDataRemaining());

        // Verify data was copied to output buffer
        byte[] copiedData = Arrays.copyOfRange(outputBuffer, 0, dataLength);
        assertArrayEquals(testData, copiedData);
    }

    @Test

    }

    @Test
    void copiesOutputIntoProvidedBufferAndBlocksGetOutputData() throws Exception {
        // When an output buffer is provided, bytes are copied and getOutputData(Class) should fail.
        byte[] header = buildHeader(NtStatus.NT_STATUS_SUCCESS);
        byte[] output = new byte[] { 1, 2, 3, 4, 5 };

     * @param destClass the class of the destination bean
     * @return a new instance of the destination class with copied properties
     */
    protected static <T> T copyBeanToNewBean(final Object src, final Class<T> destClass) {
        return BeanUtil.copyBeanToNewBean(src, destClass);
    }

    /**
     * Builds a comprehensive error message from a throwable and its causes.

        byte[] buffer = new byte[1024];

        int written = request.writeBytesWireFormat(buffer, 0);

        // Verify file ID is copied correctly (starts at offset 8)
        for (int i = 0; i < 16; i++) {
            assertEquals(customFileId[i], buffer[8 + i]);
        }
        assertEquals(56, written);
    }

    @Test