--source include/have_innodb.inc
--source include/have_innodb_16k.inc

create table t1(a blob) engine=innodb key_block_size=8;
delimiter //;
create function generate_blob()
  returns varchar(20000)
  begin
    declare x varchar(20000) default '';
    declare i int default 500;
    while i > 0 do
      set x = concat(sha1(i), x);
      set i = i - 1;
    end while;
  return x;
end //
delimiter ;//
insert into t1 select generate_blob();
let $x = `select 20000 - length(a) from t1`;
if ($x) {
  echo Blob is truncated by $x bytes.;
  die It must have been 20000 bytes.;
}
truncate t1;
insert into t1 select generate_blob();
let $x = `select 20000 - length(a) from t1`;
if ($x) {
  echo Blob is truncated by $x bytes.;
  die It must have been 20000 bytes.;
}
drop table t1;
drop function generate_blob;