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BUG#25211: events_bugs.test fails on sapsrv1

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The problem was that the events_bugs test could randomly fail due to
races in the test case.

The solution is to replace fixed sleeps with reliable polling of a
certain state to settle.  For that, a new auxiliary script
include/wait_condition.inc is used, that allows waiting for a given
query to return true.
This commit is contained in:
kroki/tomash@moonlight.home
2007-01-19 18:33:48 +03:00
parent 1480f9f48c
commit 68a4db3503
4 changed files with 205 additions and 70 deletions
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50
mysql-test/include/wait_until_rows_count.inc
View File

@@ -1,52 +1,20 @@
# include/wait_until_rows_count.inc
# inspired by wait_for_slave_status by Matthias Leich
#
# SUMMARY
#
# Waits until SELECT count(*)-$count from $table returns zero
# Waits until SELECT count(*) = $count from $table returns true, or
# the operation times out.
#
# USAGE
#
# Set vars like
# let $count=11;
# let $table=t1;
# # invoke the macro
# --include wait_until_rows_count.inc
# let $count= 5;
# let $table= t1;
# --source include/wait_until_rows_count.inc
#
# EXAMPLE
# extra/binlog/binlog_insert_delayed.test
# extra/binlog/binlog_insert_delayed.test
#
#
# TODO: generalize up to wait_[until|while] with arbitrary select or even query and
# a condition to wait or get awakened
# It's impossible to implement such a "most" general macro without
# extending mysqltest. Just no way to pass a query as an argument and
# evaluate it here, like eval "$quuery". One is bound
# to specify it inside of the macro
--disable_query_log
let $wait_counter= 300; # max wait in 0.1 seconds
while ($wait_counter)
{
eval select count(*)-$count from $table into @rez;
let $rez=`select @rez`;
let $success=`SELECT @rez = 0`;
let $no_success=1;
if ($success)
{
let $wait_counter= 1; # droppping counter to leave loop
let $no_success=0;
}
if ($no_success)
{
--sleep 0.1
}
dec $wait_counter;
}
--enable_query_log
if ($no_success)
{
--die Timeout in wait_until_rows_count.inc, required table never had a prescribed number of rows.
}
let $wait_condition=
select count(*) = $count from $table;
--source include/wait_condition.inc