From 5e0161795920b9880e8ceb8b9804f46da65c185d Mon Sep 17 00:00:00 2001
From: Asmir Mustafic <goetas@gmail.com>
Date: Fri, 9 Nov 2018 15:33:17 +0100
Subject: [PATCH] setSerializeNull option is available only on the
 serialization context

---
 ContextFactory/ConfiguredContextFactory.php           | 3 ++-
 Tests/ContextFactory/ConfiguredContextFactoryTest.php | 5 ++++-
 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/ContextFactory/ConfiguredContextFactory.php b/ContextFactory/ConfiguredContextFactory.php
index 2d0e1c3e..cf1d3b88 100644
--- a/ContextFactory/ConfiguredContextFactory.php
+++ b/ContextFactory/ConfiguredContextFactory.php
@@ -116,7 +116,8 @@ private function configureContext(Context $context)
         if (!empty($this->groups)) {
             $context->setGroups($this->groups);
         }
-        if ($this->serializeNulls !== null) {
+
+        if (($context instanceof SerializationContext) && $this->serializeNulls !== null) {
             $context->setSerializeNull($this->serializeNulls);
         }
 
diff --git a/Tests/ContextFactory/ConfiguredContextFactoryTest.php b/Tests/ContextFactory/ConfiguredContextFactoryTest.php
index cf9e7781..4faf0a55 100644
--- a/Tests/ContextFactory/ConfiguredContextFactoryTest.php
+++ b/Tests/ContextFactory/ConfiguredContextFactoryTest.php
@@ -3,6 +3,7 @@
 namespace JMS\SerializerBundle\Tests\ContextFactory;
 
 use JMS\Serializer\Context;
+use JMS\Serializer\SerializationContext;
 use JMS\SerializerBundle\ContextFactory\ConfiguredContextFactory;
 use PHPUnit\Framework\TestCase;
 
@@ -47,7 +48,9 @@ public function testCreateSerializationContext(
         $context = $object->$factoryMethod();
         /** @var Context $context */
         $this->assertInstanceOf($expectedContextClass, $context);
-        $this->assertSame($serializeNulls, $context->shouldSerializeNull());
+        if ($context instanceof SerializationContext) {
+            $this->assertSame($serializeNulls, $context->shouldSerializeNull());
+        }
 
         $this->assertSame($version, $context->getAttribute('version'));
         $this->assertSame($groups, $context->getAttribute('groups'));