Bug #42419: test suite fix

Moved the test case for the bug into a separate file (and restored the 
original innodb_mysql test setup).
Used the new wait_show_condition test macro to avoid the usage of sleep

mysql-test/include/wait_show_condition.inc:
  Bug #42419: new test macro to wait for a row in SHOW to have a certain value.
mysql-test/r/innodb_bug42419.result:
  Bug #42419: test case
mysql-test/r/innodb_mysql.result:
  Bug #42419: revert to the original innodb_mysql test
mysql-test/t/innodb_bug42419.test:
  Bug #42419: test case
mysql-test/t/innodb_mysql-master.opt:
  Bug #42419: revert to the original innodb_mysql test
mysql-test/t/innodb_mysql.test:
  Bug #42419: revert to the original innodb_mysql test

1 files changed, 78 insertions, 0 deletions

diff --git a/mysql-test/include/wait_show_condition.inc b/mysql-test/include/wait_show_condition.inc
new file mode 100644
index 00000000000..253101d1e07
--- /dev/null
+++ b/mysql-test/include/wait_show_condition.inc
@@ -0,0 +1,78 @@
+# include/wait_show_condition.inc
+#
+# SUMMARY
+#
+#    Waits until the show statement ($show_statement) has at least within one of
+#    the rows of the result set for the field ($field) a value which fulfils
+#    a condition ($condition), or the operation times out.
+#    
+#
+# USAGE
+#
+#    let $show_statement= SHOW PROCESSLIST;
+#    let $field= State;
+#    let $condition= = 'Updating';
+#    --source include/wait_show_condition.inc
+#
+#   OR
+#
+#    let $wait_timeout= 60; # Override default of 30 seconds with 60.
+#    let $show_statement= SHOW PROCESSLIST;
+#    let $field= State;
+#    let $condition= = 'Updating';
+#    --source include/wait_show_condition.inc
+#
+# Please do not use this use routine if you can replace the SHOW statement
+# with a select. In such a case include/wait_condition.inc is recommended.
+#
+# Created: 2009-02-18 mleich
+#
+
+let $max_run_time= 30;
+if ($wait_timeout)
+{
+  let $max_run_time= $wait_timeout;
+}
+# Reset $wait_timeout so that its value won't be used on subsequent
+# calls, and default will be used instead.
+let $wait_timeout= 0;
+
+# The smallest timespan till UNIX_TIMESTAMP() gets incremented is ~0 seconds.
+# We add one second to avoid the case that somebody measures timespans on a
+# real clock with fractions of seconds, detects that n seconds are sufficient,
+# assigns n to this routine and suffers because he sometimes gets n - 1
+# seconds in reality.
+inc $max_run_time;
+
+let $found= 0;
+let $max_end_time= `SELECT UNIX_TIMESTAMP() + $max_run_time`;
+while (`SELECT UNIX_TIMESTAMP() <= $max_end_time AND $found = 0`)
+{
+   # Sleep a bit to avoid too heavy load.
+   real_sleep 0.2;
+   let $rowno= 1;
+   let $process_result= 1;
+   while (`SELECT $process_result = 1 AND $found = 0`)
+   {
+      let $field_value= query_get_value($show_statement, $field, $rowno);
+      if (`SELECT '$field_value' $condition`)
+      {
+         let $found= 1;
+      }
+      if (`SELECT '$field_value' = 'No such row'`)
+      {
+         # We are behind the last row of the result set.
+         let $process_result= 0;
+      }
+      inc $rowno;
+   }
+}
+if (!$found)
+{
+  echo # Timeout in include/wait_show_condition.inc for $wait_condition;
+  echo #         show_statement : $show_statement;
+  echo #         field          : $field;
+  echo #         condition      : $condition;
+  echo #         max_run_time   : $max_run_time;
+}
+