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BEGIN { do "./t/lib/ANFANG.pm" or die ( $@ || $! ) }
use DBIx::Class::Optional::Dependencies -skip_all_without => 'test_rdbms_pg';
use strict;
use warnings;
use Test::More;
use Test::Exception;
use Time::HiRes qw(time sleep);
use List::Util 'max';
use DBICTest;
my $main_pid = $$;
# README: If you set the env var to a number greater than 5,
# we will use that many children
my $num_children = $ENV{DBICTEST_FORK_STRESS} || 1;
if($num_children !~ /^[0-9]+$/ || $num_children < 5) {
$num_children = 5;
}
my ($dsn, $user, $pass) = @ENV{map { "DBICTEST_PG_${_}" } qw/DSN USER PASS/};
my $schema = DBICTest::Schema->connect($dsn, $user, $pass, { AutoCommit => 1 });
my $parent_rs;
eval {
my $dbh = $schema->storage->dbh;
{
local $SIG{__WARN__} = sub {};
eval { $dbh->do("DROP TABLE cd") };
$dbh->do("CREATE TABLE cd (cdid serial PRIMARY KEY, artist INTEGER NOT NULL UNIQUE, title VARCHAR(100) NOT NULL UNIQUE, year VARCHAR(100) NOT NULL, genreid INTEGER, single_track INTEGER);");
}
$schema->resultset('CD')->create({ title => 'vacation in antarctica', artist => 123, year => 1901 });
$schema->resultset('CD')->create({ title => 'vacation in antarctica part 2', artist => 456, year => 1901 });
$parent_rs = $schema->resultset('CD')->search({ year => 1901 });
is ($parent_rs->count, 2);
};
ok(!$@) or diag "Creation eval failed: $@";
# basic tests
{
ok ($schema->storage->connected(), 'Parent is connected');
is ($parent_rs->next->id, 1, 'Cursor advanced');
my ($parent_in, $child_out);
pipe( $parent_in, $child_out ) or die "Pipe open failed: $!";
my $pid = fork;
if(!defined $pid) {
die "fork failed: $!";
}
if (!$pid) {
close $parent_in;
#simulate a subtest to not confuse the parent TAP emission
my $tb = Test::More->builder;
$tb->reset;
for (qw/output failure_output todo_output/) {
close $tb->$_;
open ($tb->$_, '>&', $child_out);
}
ok(!$schema->storage->connected, "storage->connected() false in child");
for (1,2) {
throws_ok { $parent_rs->next } qr/\QMulti-process access attempted while cursor in progress (position 1)/;
}
$parent_rs->reset;
is($parent_rs->next->id, 1, 'Resetting cursor reprepares it within child environment');
done_testing;
exit 0;
}
close $child_out;
while (my $ln = <$parent_in>) {
print " $ln";
}
waitpid( $pid, 0 );
ok(!$?, 'Child subtests passed');
is ($parent_rs->next->id, 2, 'Cursor still intact in parent');
is ($parent_rs->next, undef, 'Cursor exhausted');
}
$parent_rs->reset;
# sleep until this spot so everything starts simultaneously
# add "until turn of second" for prettier display
my $t = int( time() ) + 4;
my @pids;
while(@pids < $num_children) {
my $pid = fork;
if(!defined $pid) {
die "fork failed: $!";
}
elsif($pid) {
push(@pids, $pid);
next;
}
$pid = $$;
sleep( max( 0.1, $t - time ) );
note ("Child process $pid starting work at " . time() );
my $work = sub {
my $child_rs = $schema->resultset('CD')->search({ year => 1901 });
my $row = $parent_rs->next;
$schema->resultset('CD')->create({ title => "test success $pid", artist => $pid, year => scalar(@pids) })
if($row && $row->get_column('artist') =~ /^(?:123|456)$/);
};
# try with and without transactions
if ((@pids % 3) == 1) {
my $guard = $schema->txn_scope_guard;
$work->();
$guard->commit;
}
elsif ((@pids % 3) == 2) {
$schema->txn_do ($work);
}
else {
$work->();
}
sleep(2);
exit 0;
}
ok(1, "past forking");
for (@pids) {
waitpid($_,0);
ok (! $?, "Child $_ exitted cleanly");
};
ok(1, "past waiting");
while(@pids) {
my $pid = pop(@pids);
my $rs = $schema->resultset('CD')->search({ title => "test success $pid", artist => $pid, year => scalar(@pids) });
is($rs->next->get_column('artist'), $pid, "Child $pid successful");
}
ok(1, "Made it to the end");
done_testing;
END {
$schema->storage->dbh->do("DROP TABLE cd") if ($schema and $main_pid == $$);
undef $schema;
}