Improve --check-testcase

mysql-test/include/check-testcase.test:
  Improved version of check-testcase that does not use mysqldump
mysql-test/mysql-test-run.pl:
  Make check-testcase restart servers if it detects something not cleaned up

mysql-test/include/check-testcase.test

+
 #
 # This test is executed twice for each test case if mysql-test-run is passed
-# the flag --check-testcase.
-# Before every testcase it's run with mysqltest in record mode and will
-# thus produce an output file
-# that can be compared to output from after the tescase.
-# In that way it's possible to check that a testcase does not have
+# the flag --check-testcase. Before every testcase it is run with mysqltest
+# in record mode and will thus produce an output file that can be compared
+# to output from after the tescase.
+# In that way its possible to check that a testcase does not have
 # any unwanted side affects.
 #
 
-#
-# Dump all global variables
-#
-show global variables;
+# Dump all global variables except those
+# that are supposed to change
+show global variables where Variable_name != 'timestamp';
 
-#
-# Dump all databases
-#
+# Dump all databases, there should be none
+# except mysql, test and information_schema
 show databases;
 
-#
-# Dump the "test" database, all it's tables and their data
-#
---exec $MYSQL_DUMP --skip-comments --skip-lock-tables test
+# The test database should not contain any tables
+show tables from test;
 
-#
-# Dump the "mysql" database and it's tables
-# Select data separately to add "order by"
-#
---exec $MYSQL_DUMP --skip-comments --skip-lock-tables --no-data mysql
+# Dump the "mysql" database and its tables
 use mysql;
+show tables;
+show create table columns_priv;
+show create table db;
+show create table func;
+show create table help_category;
+show create table help_keyword;
+show create table help_relation;
+show create table help_relation;
+show create table host;
+show create table proc;
+show create table procs_priv;
+show create table tables_priv;
+show create table time_zone;
+show create table time_zone_leap_second;
+show create table time_zone_name;
+show create table time_zone_transition;
+show create table time_zone_transition_type;
+show create table user;
+
+# Select data from system tables to make sure they have been properly
+# restored after test
 select * from columns_priv;
 select * from db order by host, db, user;
 select * from func;

mysql-test/mysql-test-run.pl

@@ -149,7 +149,7 @@ my $opt_mtr_build_thread= $ENV{'MTR_BUILD_THREAD'} || "auto";
 
 my $opt_record;
 my $opt_report_features;
-my $opt_check_testcases;
+our $opt_check_testcases;
 my $opt_mark_progress;
 
 my $opt_sleep;
@@ -2123,6 +2123,7 @@ sub do_before_run_mysqltest($)
 sub run_check_testcase_all($$)
 {
   my ($tinfo, $mode)= @_;
+  my $result;
 
   foreach my $mysqld ( mysqlds() )
   {
@@ -2132,9 +2133,11 @@ sub run_check_testcase_all($$)
       {
 	# Check failed, mark the test case with that info
 	$tinfo->{'check_testcase_failed'}= 1;
+	$result= 1;
       }
     }
   }
+  return $result;
 }
 
 
@@ -2323,7 +2326,12 @@ sub run_testcase ($) {
 
 	if ( $opt_check_testcases )
 	{
-	  run_check_testcase_all($tinfo, "after");
+	  if (run_check_testcase_all($tinfo, "after"))
+	  {
+	    # Stop all servers that are known to be running
+	    stop_all_servers();
+	    mtr_report("Resuming tests...\n");
+	  }
 	}
       }
       elsif ( $res == 62 )
@@ -2602,7 +2610,8 @@ sub mysqld_arguments ($$$) {
   }
 
   # Check if "extra_opt" contains skip-log-bin
-  my $skip_binlog= grep(/^(--|--loose-)skip-log-bin/, @$extra_opt, @opt_extra_mysqld_opt);
+  my $skip_binlog= grep(/^(--|--loose-)skip-log-bin/,
+			@$extra_opt, @opt_extra_mysqld_opt);
 
   if ( $opt_debug )
   {