X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=t%2F39_singletons.t;h=3676b48dd98eecf1f468bed87a69168f36fc9bf8;hb=345e7fd079ea47414f8d2601e47689a0dbd16c97;hp=f9ff2e1067e0816b3ae85b676def33270e1e7f68;hpb=3ad3bcb6eb2fe7fdec1e92bcaa872b96d03e707a;p=dbsrgits%2FDBM-Deep.git

diff --git a/t/39_singletons.t b/t/39_singletons.t
index f9ff2e1..3676b48 100644
--- a/t/39_singletons.t
+++ b/t/39_singletons.t
@@ -1,24 +1,64 @@
 use strict;
-use Test::More tests => 2;
+use Test::More tests => 11;
 use Test::Deep;
 use t::common qw( new_fh );
 
 use_ok( 'DBM::Deep' );
 
-my ($fh, $filename) = new_fh();
-my $db = DBM::Deep->new(
-    file => $filename,
-    locking => 1,
-    autoflush => 1,
-);
+{
+    my ($fh, $filename) = new_fh();
+    my $db = DBM::Deep->new(
+        file => $filename,
+        locking => 1,
+        autoflush => 1,
+    );
 
-$db->{foo} = { a => 'b' };
-my $x = $db->{foo};
-my $y = $db->{foo};
+    $db->{a} = 1;
+    $db->{foo} = { a => 'b' };
+    my $x = $db->{foo};
+    my $y = $db->{foo};
 
-print "$x -> $y\n";
+    is( $x, $y, "The references are the same" );
 
-TODO: {
-    local $TODO = "Singletons aren't working yet";
-is( $x, $y, "The references are the same" );
+    delete $db->{foo};
+    is( $x, undef, "After deleting the DB location, external references are also undef (\$x)" );
+    is( $y, undef, "After deleting the DB location, external references are also undef (\$y)" );
+    is( $x + 0, undef, "DBM::Deep::Null can be added to." );
+    is( $y + 0, undef, "DBM::Deep::Null can be added to." );
+    is( $db->{foo}, undef, "The {foo} location is also undef." );
+
+    # These shenanigans work to get another hashref
+    # into the same data location as $db->{foo} was.
+    $db->{foo} = {};
+    delete $db->{foo};
+    $db->{foo} = {};
+    $db->{bar} = {};
+
+    is( $x, undef, "After re-assigning to {foo}, external references to old values are still undef (\$x)" );
+    is( $y, undef, "After re-assigning to {foo}, external references to old values are still undef (\$y)" );
+}
+
+SKIP: {
+    skip "What do we do with external references and txns?", 2;
+    my ($fh, $filename) = new_fh();
+    my $db = DBM::Deep->new(
+        file => $filename,
+        locking => 1,
+        autoflush => 1,
+        num_txns => 2,
+    );
+
+    $db->{foo} = { a => 'b' };
+    my $x = $db->{foo};
+
+    $db->begin_work;
+    
+        $db->{foo} = { c => 'd' };
+        my $y = $db->{foo};
+
+        # XXX What should happen here with $x and $y?
+        is( $x, $y );
+        is( $x->{c}, 'd' );
+
+    $db->rollback;
 }