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t/40blobs.t  view on Meta::CPAN

#   Main loop; leave this untouched, put tests after creating
#   the new table.
#
while (Testing()) {
    #
    #   Connect to the database
    Test($state or $dbh = DBI->connect($test_dsn, $test_user, $test_password))
	or ServerError();

    #
    #   Find a possible new table name
    #
    Test($state or $table = FindNewTable($dbh))
	   or DbiError($dbh->error, $dbh->errstr);

    foreach $size (127, 128, 256, 512, 1024) {
	#
	#   Create a new table
	#
	if (!$state) { print "Blob size: ", $size * 256, "\n" }

	Test($state or ($def = TableDefinition($table,
					  ["id",   "INTEGER",      4, 0],
					  ["name", "BLOB",     $size, 0]),
			$dbh->do($def)))
	       or DbiError($dbh->err, $dbh->errstr);


	#
	#  Create a blob
	#
	my ($blob) = "";
	if (!$state) {
	    my $b = "";
	    for ($j = 0;  $j < 256;  $j++) {
		$b .= chr($j);
	    }
	    for ($i = 0;  $i < $size;  $i++) {
		$blob .= $b;
	    }
	}

	#
	#   Insert a row into the test table.......
	#
	my($sth);
        Test($state or
	     ($sth = $dbh->prepare("INSERT INTO $table VALUES(1, ?)")))
	       or DbiError($dbh->err, $dbh->errstr);
	Test($state or $sth->bind_param(1, $blob, DBI::SQL_LONGVARBINARY()))
	    or DbiError($sth->err, $sth->errstr);
	Test($state or $sth->execute())
	    or DbiError($sth->err, $sth->errstr);
	Test($state or $sth->finish)
	    or DbiError($sth->err, $sth->errstr);

	#
	#   Now, try SELECT'ing the row out.
	#
	$dbh->{LongReadLen} = length($blob)+1;
	Test($state or $cursor = $dbh->prepare("SELECT id, name FROM $table"
					       . " WHERE id = 1"))
	       or DbiError($dbh->err, $dbh->errstr);

	Test($state or $cursor->execute)
	       or DbiError($dbh->err, $dbh->errstr);

	Test($state or (defined($row = $cursor->fetchrow_arrayref)))
	    or DbiError($cursor->err, $cursor->errstr);

	Test($state or (@$row == 2  &&  $$row[0] == 1  &&  $$row[1] eq $blob))
	    or (ShowBlob($blob),
		ShowBlob(defined($$row[1]) ? $$row[1] : ""));

	Test($state or $cursor->finish)
	       or DbiError($cursor->err, $cursor->errstr);

	Test($state or undef $cursor || 1)
	       or DbiError($cursor->err, $cursor->errstr);

	#
	#   Finally drop the test table.
	#
	Test($state or $dbh->do("DROP TABLE $table"))
	       or DbiError($dbh->err, $dbh->errstr);
    }
}