Introduce M.A.D. within the schema/source instance linkage

[dbsrgits/DBIx-Class.git] / t / 52leaks.t

diff --git a/t/52leaks.t b/t/52leaks.t
index 792c3d3..f8cd1c3 100644 (file)
--- a/t/52leaks.t
+++ b/t/52leaks.t
@@ -1,6 +1,3 @@
-use strict;
-use warnings;
-
 # Do the override as early as possible so that CORE::bless doesn't get compiled away
 # We will replace $bless_override only if we are in author mode
 my $bless_override;
@@ -11,6 +8,8 @@ BEGIN {
   *CORE::GLOBAL::bless = sub { goto $bless_override };
 }
 
+use strict;
+use warnings;
 use Test::More;
 
 use lib qw(t/lib);
@@ -97,9 +96,10 @@ unless (DBICTest::RunMode->is_plain) {
 
   ok ($storage->connected, 'we are connected');
 
-  my $row_obj = $rs->next;
+  my $row_obj = $rs->search({}, { rows => 1})->next;  # so that commits/rollbacks work
   ok ($row_obj, 'row from db');
 
+  # txn_do to invoke more codepaths
   my ($mc_row_obj, $pager, $pager_explicit_count) = $schema->txn_do (sub {
 
     my $artist = $rs->create ({
@@ -122,12 +122,35 @@ unless (DBICTest::RunMode->is_plain) {
   # based on 66 per 10 pages
   is ($pager_explicit_count->last_page, 7, 'Correct last page');
 
+  # do some population (invokes some extra codepaths)
+  # also exercise the guard code and the manual txn control
+  {
+    my $guard = $schema->txn_scope_guard;
+    # populate with bindvars
+    $rs->populate([{ name => 'James Bound' }]);
+    $guard->commit;
+
+    $schema->txn_begin;
+    # populate mixed
+    $rs->populate([{ name => 'James Rebound', rank => \ '11'  }]);
+    $schema->txn_commit;
+
+    $schema->txn_begin;
+    # and without bindvars
+    $rs->populate([{ name => \ '"James Unbound"' }]);
+    $schema->txn_rollback;
+  }
+
   my $base_collection = {
     schema => $schema,
     storage => $storage,
 
     resultset => $rs,
 
+    # twice so that we make sure only one H::M object spawned
+    chained_resultset => $rs->search_rs ({}, { '+columns' => [ 'foo' ] } ),
+    chained_resultset2 => $rs->search_rs ({}, { '+columns' => [ 'bar' ] } ),
+
     row_object => $row_obj,
 
     result_source => $rs->result_source,
@@ -147,11 +170,47 @@ unless (DBICTest::RunMode->is_plain) {
     $weak_registry->{"basic $_"} = { weakref => $base_collection->{$_} };
     weaken $weak_registry->{"basic $_"}{weakref};
   }
-
 }
 
-memory_cycle_ok($weak_registry, 'No cycles in the weakened object collection')
-  if $have_test_cycle;
+# check that "phantom-chaining" works - we never lose track of the original $schema
+# and have access to the entire tree without leaking anything
+{
+  my $phantom;
+  for (
+    sub { DBICTest->init_schema },
+    sub { shift->source('Artist') },
+    sub { shift->resultset },
+    sub { shift->result_source },
+    sub { shift->schema },
+    sub { shift->resultset('Artist') },
+    sub { shift->find_or_create({ name => 'detachable' }) },
+    sub { shift->result_source },
+    sub { shift->schema },
+    sub { shift->clone },
+    sub { shift->resultset('Artist') },
+    sub { shift->next },
+    sub { shift->result_source },
+    sub { shift->resultset },
+    sub { shift->create({ name => 'detached' }) },
+    sub { shift->update({ name => 'reattached' }) },
+    sub { shift->discard_changes },
+    sub { shift->delete },
+    sub { shift->insert },
+  ) {
+    $phantom = $_->($phantom);
+
+    my $slot = (sprintf 'phantom %s=%s(0x%x)', # so we don't trigger stringification
+      ref $phantom,
+      reftype $phantom,
+      refaddr $phantom,
+    );
+    $weak_registry->{$slot} = $phantom;
+    weaken $weak_registry->{$slot};
+  }
+
+  ok( $phantom->in_storage, 'Properly deleted/reinserted' );
+  is( $phantom->name, 'reattached', 'Still correct name' );
+}
 
 # Naturally we have some exceptions
 my $cleared;
@@ -165,7 +224,7 @@ for my $slot (keys %$weak_registry) {
     delete $weak_registry->{$slot};
   }
   elsif ($slot =~ /^\QHash::Merge/) {
-    # only clear one object - more would indicate trouble
+    # only clear one object of a specific behavior - more would indicate trouble
     delete $weak_registry->{$slot}
       unless $cleared->{hash_merge_singleton}{$weak_registry->{$slot}{weakref}{behavior}}++;
   }