tests the rpcfilereadrequest #rpcfilereadrequest long , long , long constructor with avalid length . concode_field_sep long OFFSET concode_elem_sep long TEMP_UFS_FILE_ID concode_elem_sep ByteBuf mBuffer concode_elem_sep long LENGTH concode_field_sep void encodedLength concode_elem_sep void invalidLength concode_elem_sep void assertInvalid concode_elem_sep void encodeDecode concode_elem_sep void before concode_elem_sep void assertValid concode_elem_sep void assertValid concode_elem_sep void negativeOffset concode_elem_sep void validate