Add _merge_joinpref_attr test w/ {}/undef (empty) vals

Added a test for the case of join attrs specified with empty ({} or
undef) vals (i.e. join => { rel => { rel2 => {} } }). These tests pass,
however, the empty {} vals currently produce uninitialized warnings.

For further reference, these warnings were bypassed for RapidApp in this
commit:

 https://github.com/vanstyn/RapidApp/commit/6f41f6e48

This test was added per the request of @ribasushi

diff --git a/t/91merge_joinpref_attr.t b/t/91merge_joinpref_attr.t
index 0e9f601..a7f9b97 100644 (file)
--- a/t/91merge_joinpref_attr.t
+++ b/t/91merge_joinpref_attr.t
@@ -6,7 +6,7 @@ use lib qw(t/lib);
 use DBICTest;
 use Test::More;
 
-plan tests => 15;
+plan tests => 17;
 
 my $schema = DBICTest->init_schema();
 my $rs = $schema->resultset( 'CD' );
@@ -131,5 +131,20 @@ my $rs = $schema->resultset( 'CD' );
   is_deeply( $result, $expected );
 }
 
+{
+  my $a = [ { 'artist' => { 'manager' => {} } }, 'cd' ];
+  my $b = [ 'artist', { 'artist' => { 'manager' => {} } } ];
+  my $expected = [ { 'artist' => { 'manager' => {} } }, 'cd', { 'artist' => { 'manager' => {} } } ];
+  my $result = $rs->_merge_joinpref_attr($a, $b);
+  is_deeply( $result, $expected );
+}
+
+{
+  my $a = [ { 'artist' => { 'manager' => undef } }, 'cd' ];
+  my $b = [ 'artist', { 'artist' => { 'manager' => undef } } ];
+  my $expected = [ { 'artist' => { 'manager' => undef } }, 'cd', { 'artist' => { 'manager' => undef } } ];
+  my $result = $rs->_merge_joinpref_attr($a, $b);
+  is_deeply( $result, $expected );
+}
 
 1;