Introduce GOVERNANCE document and empty RESOLUTIONS file.

[dbsrgits/DBIx-Class.git] / t / 50fork.t

diff --git a/t/50fork.t b/t/50fork.t
index d42c0f4..229a4f2 100644 (file)
--- a/t/50fork.t
+++ b/t/50fork.t
@@ -1,30 +1,26 @@
+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';
 
-# README: If you set the env var to a number greater than 10,
-#   we will use that many children
-
-my ($dsn, $user, $pass) = @ENV{map { "DBICTEST_PG_${_}" } qw/DSN USER PASS/};
-my $num_children = $ENV{DBICTEST_FORK_STRESS};
-
-plan skip_all => 'Set $ENV{DBICTEST_FORK_STRESS} to run this test'
-    unless $num_children;
+use DBICTest;
 
-plan skip_all => 'Set $ENV{DBICTEST_PG_DSN}, _USER and _PASS to run this test'
-      . ' (note: creates and drops a table named artist!)' unless ($dsn && $user);
+my $main_pid = $$;
 
-if($num_children !~ /^[0-9]+$/ || $num_children < 10) {
-   $num_children = 10;
+# 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;
 }
 
-plan tests => $num_children + 5;
-
-use lib qw(t/lib);
-
-use_ok('DBICTest::Schema');
-
-my $schema = DBICTest::Schema->connection($dsn, $user, $pass, { AutoCommit => 1 });
+my ($dsn, $user, $pass) = @ENV{map { "DBICTEST_PG_${_}" } qw/DSN USER PASS/};
+my $schema = DBICTest::Schema->connect($dsn, $user, $pass, { AutoCommit => 1 });
 
 my $parent_rs;
 
@@ -34,17 +30,70 @@ eval {
     {
         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(255) NOT NULL UNIQUE, year VARCHAR(255));");
+        $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 });
-    $parent_rs->next;
+    is ($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) {
 
@@ -59,18 +108,39 @@ while(@pids < $num_children) {
 
     $pid = $$;
 
-    my $child_rs = $schema->resultset('CD')->search({ year => 1901 });
-    my $row = $parent_rs->next;
-    if($row && $row->get_column('artist') =~ /^(?:123|456)$/) {
-        $schema->resultset('CD')->create({ title => "test success $pid", artist => $pid, year => scalar(@pids) });
+    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);
     }
-    sleep(3);
-    exit;
+    else {
+      $work->();
+    }
+
+    sleep(2);
+    exit 0;
 }
 
 ok(1, "past forking");
 
-waitpid($_,0) for(@pids);
+for (@pids) {
+  waitpid($_,0);
+  ok (! $?, "Child $_ exitted cleanly");
+};
 
 ok(1, "past waiting");
 
@@ -82,4 +152,9 @@ while(@pids) {
 
 ok(1, "Made it to the end");
 
-$schema->storage->dbh->do("DROP TABLE cd");
+done_testing;
+
+END {
+  $schema->storage->dbh->do("DROP TABLE cd") if ($schema and $main_pid == $$);
+  undef $schema;
+}