byte[] emptyBuffer = new byte[100];
            byte[] fullBuffer = new byte[100];
            for (int i = 0; i < fullBuffer.length; i++) {
                fullBuffer[i] = (byte) i;
            }

            assertEquals(0, echoRequest.readBytesWireFormat(emptyBuffer, 0));
            assertEquals(0, echoRequest.readBytesWireFormat(fullBuffer, 50));
        }

        @Test

        void testReadDataWireFormatWithOffset() {
            byte[] fullBuffer = new byte[200];
            byte[] dfsData = createValidDfsReferralBuffer();
            int offset = 50;
            System.arraycopy(dfsData, 0, fullBuffer, offset, dfsData.length);

            int bytesRead = response.readDataWireFormat(fullBuffer, offset, dfsData.length);

            assertTrue(bytesRead > 0);

        int startIndex = 10;

        // Prepare buffer with offset
        byte[] fullBuffer = new byte[buffer.length + startIndex];
        System.arraycopy(buffer, 0, fullBuffer, startIndex, buffer.length);

        setErrorCode(response, 0);

        int bytesRead = response.readDataWireFormat(fullBuffer, startIndex, buffer.length);

        // Verify the method returns the correct number of bytes read

        // Various buffer contents
        byte[] emptyBuffer = new byte[256];
        byte[] fullBuffer = createTestData(256);

        // When
        int emptyRead = request.readBytesWireFormat(emptyBuffer, 0);
        int fullRead = request.readBytesWireFormat(fullBuffer, 50);

        // Then - always returns 0 as this is a request, not response
        assertEquals(0, emptyRead);

		}
		if e != ErrBufferFull { // unexpected error
			err = e
			break
		}

		// Make a copy of the buffer.
		buf := bytes.Clone(frag)
		fullBuffers = append(fullBuffers, buf)
		totalLen += len(buf)
	}

	totalLen += len(frag)
	return fullBuffers, frag, totalLen, err
}

// ReadBytes reads until the first occurrence of delim in the input,