Check if innodb_lock_wait_timeout exists, don't crash.

t/pt-online-schema-change/skip_innodb.t

@@ -0,0 +1,60 @@
+#!/usr/bin/env perl
+
+BEGIN {
+   die "The PERCONA_TOOLKIT_BRANCH environment variable is not set.\n"
+      unless $ENV{PERCONA_TOOLKIT_BRANCH} && -d $ENV{PERCONA_TOOLKIT_BRANCH};
+   unshift @INC, "$ENV{PERCONA_TOOLKIT_BRANCH}/lib";
+};
+
+use strict;
+use warnings FATAL => 'all';
+use English qw(-no_match_vars);
+use Test::More;
+
+use PerconaTest;
+use Sandbox;
+require "$trunk/bin/pt-online-schema-change";
+
+diag(`$trunk/sandbox/stop-sandbox 12348 >/dev/null`);
+diag(`SKIP_INNODB=1 $trunk/sandbox/start-sandbox master 12348 >/dev/null`);
+
+my $dp = new DSNParser(opts=>$dsn_opts);
+my $sb = new Sandbox(basedir => '/tmp', DSNParser => $dp);
+my $master_dbh = $sb->get_dbh_for('master1');
+
+if ( !$master_dbh ) {
+   plan skip_all => 'Cannot connect to sandbox master 12348';
+}
+else {
+   plan tests => 2;
+}
+
+my $master_dsn = 'h=127.1,P=12348,u=msandbox,p=msandbox';
+my @args       = (qw(--lock-wait-timeout 3), '--max-load', ''); 
+my $output;
+my $retval;
+
+$output = output(
+   sub { $retval = pt_online_schema_change::main(@args,
+      "$master_dsn,D=mysql,t=user", "--alter", "add column (foo int)",
+      qw(--dry-run)) },
+   stderr => 1,
+);
+
+like(
+   $output,
+   qr/`mysql`.`user`/,
+   "Ran without InnoDB (bug 994010)"
+);
+
+is(
+   $retval,
+   0,
+   "0 exit status (bug 994010)"
+);
+
+# #############################################################################
+# Done.
+# #############################################################################
+diag(`$trunk/sandbox/stop-sandbox 12348 >/dev/null`);
+exit;