Add tests for GraphNavigator changes

Tests/Serializer/GraphNavigatorTest.php

@@ -5,7 +5,7 @@ namespace JMS\SerializerBundle\Tests\Serializer;
 use Doctrine\Common\Annotations\AnnotationReader;
 use JMS\SerializerBundle\Metadata\Driver\AnnotationDriver;
 use JMS\SerializerBundle\Serializer\GraphNavigator;
-use Metadata\MetadataFactory;
+use Metadata\MetadataFactory;
 
 class GraphNavigatorTest extends \PHPUnit_Framework_TestCase
 {
@@ -22,6 +22,41 @@ class GraphNavigatorTest extends \PHPUnit_Framework_TestCase
         $this->navigator->accept(STDIN, null, $this->visitor);
     }
 
+    public function testNavigatorPassesInstanceOnSerialization()
+    {
+        $object = new SerializableClass;
+        $metadata = $this->metadataFactory->getMetadataForClass(get_class($object));
+
+        $exclusionStrategy = $this->getMock('JMS\SerializerBundle\Serializer\Exclusion\ExclusionStrategyInterface');
+        $exclusionStrategy->expects($this->once())
+            ->method('shouldSkipClass')
+            ->with($metadata, $object);
+        $exclusionStrategy->expects($this->once())
+            ->method('shouldSkipProperty')
+            ->with($metadata->propertyMetadata['foo'], $object);
+
+        $this->navigator = new GraphNavigator(GraphNavigator::DIRECTION_SERIALIZATION, $this->metadataFactory, $exclusionStrategy);
+        $this->navigator->accept($object, null, $this->visitor);
+    }
+
+    public function testNavigatorPassesNullOnDeserialization()
+    {
+        $class = __NAMESPACE__.'\SerializableClass';
+        $metadata = $this->metadataFactory->getMetadataForClass($class);
+
+        $exclusionStrategy = $this->getMock('JMS\SerializerBundle\Serializer\Exclusion\ExclusionStrategyInterface');
+        $exclusionStrategy->expects($this->once())
+            ->method('shouldSkipClass')
+            ->with($metadata, null);
+
+        $exclusionStrategy->expects($this->once())
+            ->method('shouldSkipProperty')
+            ->with($metadata->propertyMetadata['foo'], null);
+
+        $this->navigator = new GraphNavigator(GraphNavigator::DIRECTION_DESERIALIZATION, $this->metadataFactory, $exclusionStrategy);
+        $this->navigator->accept('random', $class, $this->visitor);
+    }
+
     protected function setUp()
     {
         $this->visitor = $this->getMock('JMS\SerializerBundle\Serializer\VisitorInterface');
@@ -30,3 +65,8 @@ class GraphNavigatorTest extends \PHPUnit_Framework_TestCase
         $this->navigator = new GraphNavigator(GraphNavigator::DIRECTION_SERIALIZATION, $this->metadataFactory);
     }
 }
+
+class SerializableClass
+{
+    public $foo = 'bar';
+}