X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=t%2Fstorage%2Ftxn.t;h=c4ecefd7fc32de9b777a5c171741888dff161486;hb=02050e77ae9d754e33ca2d5391f5a6bbbe3e43b1;hp=f4c56999b0e403e20cefc724c24b9d253d54dbb6;hpb=cf31592c25cdaca50da692aac978ee869e5f5339;p=dbsrgits%2FDBIx-Class.git

diff --git a/t/storage/txn.t b/t/storage/txn.t
index f4c5699..c4ecefd 100644
--- a/t/storage/txn.t
+++ b/t/storage/txn.t
@@ -7,8 +7,6 @@ use Test::Exception;
 use lib qw(t/lib);
 use DBICTest;
 
-my $schema = DBICTest->init_schema();
-
 my $code = sub {
   my ($artist, @cd_titles) = @_;
 
@@ -22,6 +20,8 @@ my $code = sub {
 
 # Test checking of parameters
 {
+  my $schema = DBICTest->init_schema;
+
   throws_ok (sub {
     (ref $schema)->txn_do(sub{});
   }, qr/storage/, "can't call txn_do without storage");
@@ -31,40 +31,37 @@ my $code = sub {
   }, qr/must be a CODE reference/, '$coderef parameter check ok');
 }
 
-# Test successful txn_do() - scalar context
-{
+# Test successful txn_do() - scalar/list context
+for my $want (0,1) {
+  my $schema = DBICTest->init_schema;
+
   is( $schema->storage->{transaction_depth}, 0, 'txn depth starts at 0');
 
   my @titles = map {'txn_do test CD ' . $_} (1..5);
   my $artist = $schema->resultset('Artist')->find(1);
   my $count_before = $artist->cds->count;
-  my $count_after = $schema->txn_do($code, $artist, @titles);
-  is($count_after, $count_before+5, 'successful txn added 5 cds');
-  is($artist->cds({
-    title => "txn_do test CD $_",
-  })->first->year, 2006, "new CD $_ year correct") for (1..5);
 
-  is( $schema->storage->{transaction_depth}, 0, 'txn depth has been reset');
-}
-
-# Test successful txn_do() - list context
-{
-  is( $schema->storage->{transaction_depth}, 0, 'txn depth starts at 0');
+  my @res;
+  if ($want) {
+    @res = $schema->txn_do($code, $artist, @titles);
+    is(scalar @res, $count_before+5, 'successful txn added 5 cds');
+  }
+  else {
+    $res[0] = $schema->txn_do($code, $artist, @titles);
+    is($res[0], $count_before+5, 'successful txn added 5 cds');
+  }
 
-  my @titles = map {'txn_do test CD ' . $_} (6..10);
-  my $artist = $schema->resultset('Artist')->find(1);
-  my $count_before = $artist->cds->count;
-  my @cds = $schema->txn_do($code, $artist, @titles);
-  is(scalar @cds, $count_before+5, 'added 5 CDs and returned in list context');
   is($artist->cds({
     title => "txn_do test CD $_",
-  })->first->year, 2006, "new CD $_ year correct") for (6..10);
+  })->first->year, 2006, "new CD $_ year correct") for (1..5);
 
   is( $schema->storage->{transaction_depth}, 0, 'txn depth has been reset');
 }
 
 # Test txn_do() @_ aliasing support
 {
+  my $schema = DBICTest->init_schema;
+
   my $res = 'original';
   $schema->storage->txn_do (sub { $_[0] = 'changed' }, $res);
   is ($res, 'changed', "Arguments properly aliased for txn_do");
@@ -72,6 +69,8 @@ my $code = sub {
 
 # Test nested successful txn_do()
 {
+  my $schema = DBICTest->init_schema;
+
   is( $schema->storage->{transaction_depth}, 0, 'txn depth starts at 0');
 
   my $nested_code = sub {
@@ -99,98 +98,228 @@ my $code = sub {
   is( $schema->storage->{transaction_depth}, 0, 'txn depth has been reset');
 }
 
-my $fail_code = sub {
-  my ($artist) = @_;
-  $artist->create_related('cds', {
-    title => 'this should not exist',
-    year => 2005,
-  });
-  die "the sky is falling";
-};
-
-# Test failed txn_do()
+# test nested txn_begin on fresh connection
 {
+  my $schema = DBICTest->init_schema(sqlite_use_file => 1, no_deploy => 1);
+  $schema->storage->ensure_connected;
 
-  is( $schema->storage->{transaction_depth}, 0, 'txn depth starts at 0');
+  is ($schema->storage->transaction_depth, 0, 'Start outside txn');
 
-  my $artist = $schema->resultset('Artist')->find(3);
+  my @pids;
+  for my $action (
+    sub {
+      my $s = shift;
+      die "$$ starts in txn!" if $s->storage->transaction_depth != 0;
+      $s->txn_do ( sub {
+        die "$$ not in txn!" if $s->storage->transaction_depth == 0;
+        $s->storage->dbh->do('SELECT 1') } 
+      );
+      die "$$ did not finish txn!" if $s->storage->transaction_depth != 0;
+    },
+    sub {
+      $_[0]->txn_begin;
+      $_[0]->storage->dbh->do('SELECT 1');
+      $_[0]->txn_commit
+    },
+    sub {
+      my $guard = $_[0]->txn_scope_guard;
+      $_[0]->storage->dbh->do('SELECT 1');
+      $guard->commit
+    },
+  ) {
+    my $pid = fork();
+    die "Unable to fork: $!\n"
+      if ! defined $pid;
+
+    if ($pid) {
+      push @pids, $pid;
+      next;
+    }
 
-  throws_ok (sub {
-    $schema->txn_do($fail_code, $artist);
-  }, qr/the sky is falling/, 'failed txn_do threw an exception');
+    $action->($schema);
+    exit 0;
+  }
 
-  my $cd = $artist->cds({
-    title => 'this should not exist',
-    year => 2005,
-  })->first;
-  ok(!defined($cd), q{failed txn_do didn't change the cds table});
+  is ($schema->storage->transaction_depth, 0, 'Parent still outside txn');
 
-  is( $schema->storage->{transaction_depth}, 0, 'txn depth has been reset');
+  for my $pid (@pids) {
+    waitpid ($pid, 0);
+    ok (! $?, "Child $pid exit ok");
+  }
 }
 
-# do the same transaction again
+# Test txn_do/scope_guard with forking: outer txn_do
 {
-  is( $schema->storage->{transaction_depth}, 0, 'txn depth starts at 0');
+  my $schema = DBICTest->init_schema( sqlite_use_file => 1 );
+
+  for my $pass (1..2) {
+
+    # do something trying to destabilize the depth count
+    for (1..2) {
+      eval {
+        my $guard = $schema->txn_scope_guard;
+        $schema->txn_do( sub { die } );
+      };
+      $schema->txn_do( sub {
+        ok ($schema->storage->_dbh->do ('SELECT 1'), "Query after exceptions ok ($_)");
+      });
+    }
 
-  my $artist = $schema->resultset('Artist')->find(3);
+    $schema->txn_do ( sub { _test_forking_action ($schema, $pass) } );
 
-  throws_ok (sub {
-    $schema->txn_do($fail_code, $artist);
-  }, qr/the sky is falling/, 'failed txn_do threw an exception');
+  }
+}
 
-  my $cd = $artist->cds({
-    title => 'this should not exist',
-    year => 2005,
-  })->first;
-  ok(!defined($cd), q{failed txn_do didn't change the cds table});
+# same test with outer guard
+{
+  my $schema = DBICTest->init_schema( sqlite_use_file => 1 );
+
+  for my $pass (1..2) {
+
+    # do something trying to destabilize the depth count
+    for (1..2) {
+      eval {
+        my $guard = $schema->txn_scope_guard;
+        $schema->txn_do( sub { die } );
+      };
+      $schema->txn_do( sub {
+        ok ($schema->storage->_dbh->do ('SELECT 1'), "Query after exceptions ok ($_)");
+      });
+    }
 
-  is( $schema->storage->{transaction_depth}, 0, 'txn depth has been reset');
+    my $guard = $schema->txn_scope_guard;
+    my @pids = _test_forking_action ($schema, $pass);
+    $guard->commit;
+  }
 }
 
-# Test failed txn_do() with failed rollback
-{
-  is( $schema->storage->{transaction_depth}, 0, 'txn depth starts at 0');
+sub _test_forking_action {
+  my ($schema, $pass) = @_;
 
-  my $artist = $schema->resultset('Artist')->find(3);
+  my @pids;
 
-  # Force txn_rollback() to throw an exception
-  no warnings 'redefine';
-  no strict 'refs';
+  SKIP: for my $count (1 .. 5) {
 
-  # die in rollback
-  local *{"DBIx::Class::Storage::DBI::SQLite::txn_rollback"} = sub{
-    my $storage = shift;
-    die 'FAILED';
-  };
+    skip 'Weird DBI General Protection Faults, skip forking tests (RT#63104)', 5
+      if $^O eq 'MSWin32';
 
-  throws_ok (
-    sub {
-      $schema->txn_do($fail_code, $artist);
-    },
-    qr/the sky is falling.+Rollback failed/s,
-    'txn_rollback threw a rollback exception (and included the original exception'
-  );
+    my $pid = fork();
+    die "Unable to fork: $!\n"
+      if ! defined $pid;
 
-  my $cd = $artist->cds({
-    title => 'this should not exist',
-    year => 2005,
-  })->first;
-  isa_ok($cd, 'DBICTest::CD', q{failed txn_do with a failed txn_rollback }.
-         q{changed the cds table});
-  $cd->delete; # Rollback failed
-  $cd = $artist->cds({
+    if ($pid) {
+      push @pids, $pid;
+      next;
+    }
+
+    if ($count % 2) {
+      $schema->txn_do (sub {
+        my $depth = $schema->storage->transaction_depth;
+        die "$$(txn_do)unexpected txn depth $depth!" if $depth != 1;
+        $schema->resultset ('Artist')->create ({ name => "forking action $$"});
+      });
+    }
+    else {
+      my $guard = $schema->txn_scope_guard;
+      my $depth = $schema->storage->transaction_depth;
+      die "$$(scope_guard) unexpected txn depth $depth!" if $depth != 1;
+      $schema->resultset ('Artist')->create ({ name => "forking action $$"});
+      $guard->commit;
+    }
+
+    exit 0;
+  }
+
+  for my $pid (@pids) {
+    waitpid ($pid, 0);
+    ok (! $?, "Child $pid exit ok (pass $pass)");
+  }
+
+  # it is important to reap all children before checking the final db-state
+  # otherwise a deadlock may occur between the transactions running in the
+  # children and the query of the parent
+  for my $pid (@pids) {
+    isa_ok ($schema->resultset ('Artist')->find ({ name => "forking action $pid" }), 'DBIx::Class::Row');
+  }
+}
+
+my $fail_code = sub {
+  my ($artist) = @_;
+  $artist->create_related('cds', {
     title => 'this should not exist',
     year => 2005,
-  })->first;
-  ok(!defined($cd), q{deleted the failed txn's cd});
-  $schema->storage->_dbh->rollback;
-}
+  });
+  die "the sky is falling";
+};
+
+{
+  my $schema = DBICTest->init_schema;
+
+  # Test failed txn_do()
+  for my $pass (1,2) {
+
+    is( $schema->storage->{transaction_depth}, 0, "txn depth starts at 0 (pass $pass)");
+
+    my $artist = $schema->resultset('Artist')->find(3);
+
+    throws_ok (sub {
+      $schema->txn_do($fail_code, $artist);
+    }, qr/the sky is falling/, "failed txn_do threw an exception (pass $pass)");
+
+    my $cd = $artist->cds({
+      title => 'this should not exist',
+      year => 2005,
+    })->first;
+    ok(!defined($cd), qq{failed txn_do didn't change the cds table (pass $pass)});
+
+    is( $schema->storage->{transaction_depth}, 0, "txn depth has been reset (pass $pass)");
+  }
+
+
+  # Test failed txn_do() with failed rollback
+  {
+    is( $schema->storage->{transaction_depth}, 0, 'txn depth starts at 0');
+
+    my $artist = $schema->resultset('Artist')->find(3);
 
-# reset schema object (the txn_rollback meddling screws it up)
-$schema = DBICTest->init_schema();
+    # Force txn_rollback() to throw an exception
+    no warnings 'redefine';
+    no strict 'refs';
+
+    # die in rollback
+    local *{"DBIx::Class::Storage::DBI::SQLite::txn_rollback"} = sub{
+      my $storage = shift;
+      die 'FAILED';
+    };
+
+    throws_ok (
+      sub {
+        $schema->txn_do($fail_code, $artist);
+      },
+      qr/the sky is falling.+Rollback failed/s,
+      'txn_rollback threw a rollback exception (and included the original exception'
+    );
+
+    my $cd = $artist->cds({
+      title => 'this should not exist',
+      year => 2005,
+    })->first;
+    isa_ok($cd, 'DBICTest::CD', q{failed txn_do with a failed txn_rollback }.
+           q{changed the cds table});
+    $cd->delete; # Rollback failed
+    $cd = $artist->cds({
+      title => 'this should not exist',
+      year => 2005,
+    })->first;
+    ok(!defined($cd), q{deleted the failed txn's cd});
+    $schema->storage->_dbh->rollback;
+  }
+}
 
 # Test nested failed txn_do()
 {
+  my $schema = DBICTest->init_schema();
+
   is( $schema->storage->{transaction_depth}, 0, 'txn depth starts at 0');
 
   my $nested_fail_code = sub {
@@ -221,148 +350,15 @@ $schema = DBICTest->init_schema();
 
 # Grab a new schema to test txn before connect
 {
-    my $schema2 = DBICTest->init_schema(no_deploy => 1);
-    lives_ok (sub {
-        $schema2->txn_begin();
-        $schema2->txn_begin();
-    }, 'Pre-connection nested transactions.');
-
-    # although not connected DBI would still warn about rolling back at disconnect
-    $schema2->txn_rollback;
-    $schema2->txn_rollback;
-    $schema2->storage->disconnect;
-}
-$schema->storage->disconnect;
-
-# Test txn_scope_guard
-{
-  my $schema = DBICTest->init_schema();
-
-  is($schema->storage->transaction_depth, 0, "Correct transaction depth");
-  my $artist_rs = $schema->resultset('Artist');
-  my $fn = __FILE__;
-  throws_ok {
-   my $guard = $schema->txn_scope_guard;
-
-
-    $artist_rs->create({
-      name => 'Death Cab for Cutie',
-      made_up_column => 1,
-    });
-
-   $guard->commit;
-  } qr/No such column made_up_column .*? at .*?$fn line \d+/s, "Error propogated okay";
-
-  ok(!$artist_rs->find({name => 'Death Cab for Cutie'}), "Artist not created");
-
-  my $inner_exception = '';  # set in inner() below
-  throws_ok (sub {
-    outer($schema, 1);
-  }, qr/$inner_exception/, "Nested exceptions propogated");
-
-  ok(!$artist_rs->find({name => 'Death Cab for Cutie'}), "Artist not created");
-
+  my $schema = DBICTest->init_schema(no_deploy => 1);
   lives_ok (sub {
-    warnings_exist ( sub {
-      # The 0 arg says don't die, just let the scope guard go out of scope
-      # forcing a txn_rollback to happen
-      outer($schema, 0);
-    }, qr/A DBIx::Class::Storage::TxnScopeGuard went out of scope without explicit commit or error. Rolling back./, 'Out of scope warning detected');
-    ok(!$artist_rs->find({name => 'Death Cab for Cutie'}), "Artist not created");
-  }, 'rollback successful withot exception');
-
-  sub outer {
-    my ($schema) = @_;
-
-    my $guard = $schema->txn_scope_guard;
-    $schema->resultset('Artist')->create({
-      name => 'Death Cab for Cutie',
-    });
-    inner(@_);
-  }
-
-  sub inner {
-    my ($schema, $fatal) = @_;
-
-    my $inner_guard = $schema->txn_scope_guard;
-    is($schema->storage->transaction_depth, 2, "Correct transaction depth");
-
-    my $artist = $artist_rs->find({ name => 'Death Cab for Cutie' });
-
-    eval {
-      $artist->cds->create({
-        title => 'Plans',
-        year => 2005,
-        $fatal ? ( foo => 'bar' ) : ()
-      });
-    };
-    if ($@) {
-      # Record what got thrown so we can test it propgates out properly.
-      $inner_exception = $@;
-      die $@;
-    }
-
-    # inner guard should commit without consequences
-    $inner_guard->commit;
-  }
-}
-
-# make sure the guard does not eat exceptions
-{
-  my $schema = DBICTest->init_schema();
-  throws_ok (sub {
-    my $guard = $schema->txn_scope_guard;
-    $schema->resultset ('Artist')->create ({ name => 'bohhoo'});
-
-    $schema->storage->disconnect;  # this should freak out the guard rollback
-
-    die 'Deliberate exception';
-  }, qr/Deliberate exception.+Rollback failed/s);
-}
-
-# make sure it warns *big* on failed rollbacks
-{
-  my $schema = DBICTest->init_schema();
-
-  # something is really confusing Test::Warn here, no time to debug
-=begin
-  warnings_exist (
-    sub {
-      my $guard = $schema->txn_scope_guard;
-      $schema->resultset ('Artist')->create ({ name => 'bohhoo'});
-
-      $schema->storage->disconnect;  # this should freak out the guard rollback
-    },
-    [
-      qr/A DBIx::Class::Storage::TxnScopeGuard went out of scope without explicit commit or error. Rolling back./,
-      qr/\*+ ROLLBACK FAILED\!\!\! \*+/,
-    ],
-    'proper warnings generated on out-of-scope+rollback failure'
-  );
-=cut
-
-  my @want = (
-    qr/A DBIx::Class::Storage::TxnScopeGuard went out of scope without explicit commit or error. Rolling back./,
-    qr/\*+ ROLLBACK FAILED\!\!\! \*+/,
-  );
-
-  my @w;
-  local $SIG{__WARN__} = sub {
-    if (grep {$_[0] =~ $_} (@want)) {
-      push @w, $_[0];
-    }
-    else {
-      warn $_[0];
-    }
-  };
-  {
-      my $guard = $schema->txn_scope_guard;
-      $schema->resultset ('Artist')->create ({ name => 'bohhoo'});
-
-      $schema->storage->disconnect;  # this should freak out the guard rollback
-  }
+    $schema->txn_begin();
+    $schema->txn_begin();
+  }, 'Pre-connection nested transactions.');
 
-  is (@w, 2, 'Both expected warnings found');
+  # although not connected DBI would still warn about rolling back at disconnect
+  $schema->txn_rollback;
+  $schema->txn_rollback;
 }
 
 # make sure AutoCommit => 0 on external handles behaves correctly with scope_guard