Arrays.fill(buffer, (byte) 0);

            int startIndex = 100;
            request.writeBytesWireFormat(buffer, startIndex);

            // Verify data is at correct position
            for (int i = 0; i < data.length; i++) {
                assertEquals((byte) 0xAB, buffer[startIndex + 48 + i]);
            }
        }

        @Test