Throw exception when unable to normalize embedded object

Added a check to ensure that injected serializer of the
GetSetMethodNormalizer is a normalizer before normalizing object value.

src/Symfony/Component/Serializer/Normalizer/GetSetMethodNormalizer.php

@@ -99,6 +99,9 @@ class GetSetMethodNormalizer extends SerializerAwareNormalizer implements Normal
                     $attributeValue = call_user_func($this->callbacks[$attributeName], $attributeValue);
                 }
                 if (null !== $attributeValue && !is_scalar($attributeValue)) {
+                    if (!$this->serializer instanceof NormalizerInterface) {
+                        throw new \LogicException(sprintf('Cannot normalize attribute "%s" because injected serializer is not a normalizer', $attributeName));
+                    }
                     $attributeValue = $this->serializer->normalize($attributeValue, $format);
                 }
 

src/Symfony/Component/Serializer/Tests/Normalizer/GetSetMethodNormalizerTest.php

@@ -12,23 +12,42 @@
 namespace Symfony\Component\Serializer\Tests\Normalizer;
 
 use Symfony\Component\Serializer\Normalizer\GetSetMethodNormalizer;
+use Symfony\Component\Serializer\SerializerInterface;
+use Symfony\Component\Serializer\Normalizer\NormalizerInterface;
 
 class GetSetMethodNormalizerTest extends \PHPUnit_Framework_TestCase
 {
     protected function setUp()
     {
+        $this->serializer = $this->getMock(__NAMESPACE__.'\SerializerNormalizer');
         $this->normalizer = new GetSetMethodNormalizer();
-        $this->normalizer->setSerializer($this->getMock('Symfony\Component\Serializer\Serializer'));
+        $this->normalizer->setSerializer($this->serializer);
     }
 
     public function testNormalize()
     {
         $obj = new GetSetDummy();
+        $object = new \stdClass();
         $obj->setFoo('foo');
         $obj->setBar('bar');
         $obj->setCamelCase('camelcase');
+        $obj->setObject($object);
+
+        $this->serializer
+            ->expects($this->once())
+            ->method('normalize')
+            ->with($object, 'any')
+            ->will($this->returnValue('string_object'))
+        ;
+
         $this->assertEquals(
-            array('foo' => 'foo', 'bar' => 'bar', 'fooBar' => 'foobar', 'camelCase' => 'camelcase'),
+            array(
+                'foo' => 'foo',
+                'bar' => 'bar',
+                'fooBar' => 'foobar',
+                'camelCase' => 'camelcase',
+                'object' => 'string_object',
+            ),
             $this->normalizer->normalize($obj, 'any')
         );
     }
@@ -116,7 +135,7 @@ class GetSetMethodNormalizerTest extends \PHPUnit_Framework_TestCase
 
     public function testIgnoredAttributes()
     {
-        $this->normalizer->setIgnoredAttributes(array('foo', 'bar', 'camelCase'));
+        $this->normalizer->setIgnoredAttributes(array('foo', 'bar', 'camelCase', 'object'));
 
         $obj = new GetSetDummy();
         $obj->setFoo('foo');
@@ -188,6 +207,22 @@ class GetSetMethodNormalizerTest extends \PHPUnit_Framework_TestCase
             ),
         );
     }
+
+    /**
+     * @expectedException \LogicException
+     * @expectedExceptionMessage Cannot normalize attribute "object" because injected serializer is not a normalizer
+     */
+    public function testUnableToNormalizeObjectAttribute()
+    {
+        $serializer = $this->getMock('Symfony\Component\Serializer\SerializerInterface');
+        $this->normalizer->setSerializer($serializer);
+
+        $obj    = new GetSetDummy();
+        $object = new \stdClass();
+        $obj->setObject($object);
+
+        $this->normalizer->normalize($obj, 'any');
+    }
 }
 
 class GetSetDummy
@@ -195,6 +230,7 @@ class GetSetDummy
     protected $foo;
     private $bar;
     protected $camelCase;
+    protected $object;
 
     public function getFoo()
     {
@@ -235,6 +271,16 @@ class GetSetDummy
     {
         throw new \RuntimeException("Dummy::otherMethod() should not be called");
     }
+
+    public function setObject($object)
+    {
+        $this->object = $object;
+    }
+
+    public function getObject()
+    {
+        return $this->object;
+    }
 }
 
 class GetConstructorDummy
@@ -263,3 +309,7 @@ class GetConstructorDummy
         throw new \RuntimeException("Dummy::otherMethod() should not be called");
     }
 }
+
+abstract class SerializerNormalizer implements SerializerInterface, NormalizerInterface
+{
+}