From: Rafael Kitover <rkitover@cpan.org>
Date: Sat, 9 May 2009 10:50:25 +0000 (+0000)
Subject: ::DBI::Replicated - fix fallback to master, test for the warning, other cleanups
X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=commitdiff_plain;h=f404f53c20c515693dcee08cd6fa7cb69696d67c;p=dbsrgits%2FDBIx-Class-Historic.git

::DBI::Replicated - fix fallback to master, test for the warning, other cleanups
---

diff --git a/lib/DBIx/Class/Storage/DBI/Replicated/Balancer/Random.pm b/lib/DBIx/Class/Storage/DBI/Replicated/Balancer/Random.pm
index 2b0aef9..d3959d0 100644
--- a/lib/DBIx/Class/Storage/DBI/Replicated/Balancer/Random.pm
+++ b/lib/DBIx/Class/Storage/DBI/Replicated/Balancer/Random.pm
@@ -55,21 +55,20 @@ sub next_storage {
   my $self = shift @_;
 
   my @replicants = $self->pool->active_replicants;
+
+  if (not @replicants) {
+    # will fall back to master anyway
+    return;
+  }
+
   my $master     = $self->master;
 
-  my $rnd = $self->random_number(@replicants + $self->master_read_weight);
+  my $rnd = $self->_random_number(@replicants + $self->master_read_weight);
 
   return $rnd >= @replicants ? $master : $replicants[int $rnd];
 }
 
-=head2 random_number
-
-Returns a random number from 0 to x, not including x. Uses perl's
-L<perlfunc/rand> by default.
-
-=cut
-
-sub random_number {
+sub _random_number {
   rand($_[1])
 }
 
diff --git a/t/93storage_replication.t b/t/93storage_replication.t
index 40c24a5..b85da4a 100644
--- a/t/93storage_replication.t
+++ b/t/93storage_replication.t
@@ -6,12 +6,13 @@ use Test::Exception;
 use DBICTest;
 use List::Util 'first';
 use Scalar::Util 'reftype';
+use IO::Handle;
 
 BEGIN {
     eval "use DBIx::Class::Storage::DBI::Replicated; use Test::Moose";
     plan $@
         ? ( skip_all => "Deps not installed: $@" )
-        : ( tests => 89 );
+        : ( tests => 90 );
 }
 
 use_ok 'DBIx::Class::Storage::DBI::Replicated::Pool';
@@ -366,7 +367,7 @@ is $artist1->name, 'Ozric Tentacles'
     local $SIG{__WARN__} = sub {};
 
     local
-    *DBIx::Class::Storage::DBI::Replicated::Balancer::Random::random_number =
+    *DBIx::Class::Storage::DBI::Replicated::Balancer::Random::_random_number =
 	sub { 999 };
 
     $replicated->schema->storage->balancer->increment_storage;
@@ -469,13 +470,20 @@ ok $replicated->schema->resultset('Artist')->find(2)
 $replicated->schema->storage->replicants->{$replicant_names[0]}->active(0);
 $replicated->schema->storage->replicants->{$replicant_names[1]}->active(0);
 
-## Silence warning about falling back to master.
-$replicated->schema->storage->debugobj->silence(1);
- 
-ok $replicated->schema->resultset('Artist')->find(2)
-    => 'Fallback to master';
+{
+    ## catch the fallback to master warning
+    open my $debugfh, '>', \my $fallback_warning;
+    my $oldfh = $replicated->schema->storage->debugfh;
+    $replicated->schema->storage->debugfh($debugfh);
 
-$replicated->schema->storage->debugobj->silence(0);
+    ok $replicated->schema->resultset('Artist')->find(2)
+	=> 'Fallback to master';
+
+    like $fallback_warning, qr/falling back to master/
+	=> 'emits falling back to master warning';
+
+    $replicated->schema->storage->debugfh($oldfh);
+}
 
 $replicated->schema->storage->replicants->{$replicant_names[0]}->active(1);
 $replicated->schema->storage->replicants->{$replicant_names[1]}->active(1);