minor #94 Test show FieldEntry serialization Bug (alipek)

This PR was merged into the 3.2 branch.

Discussion
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Test show FieldEntry serialization Bug

Extracted from #8

Commits
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41f631b Test show FieldEntry serialization Bug

Author: wouterj

Tests/Domain/FieldEntryTest.php

@@ -12,6 +12,7 @@
 namespace Symfony\Component\Security\Acl\Tests\Domain;
 
 use Symfony\Component\Security\Acl\Domain\FieldEntry;
+use Symfony\Component\Security\Acl\Model\SecurityIdentityInterface;
 
 class FieldEntryTest extends \PHPUnit\Framework\TestCase
 {
@@ -40,6 +41,27 @@ public function testSerializeUnserialize()
         $this->assertEquals($ace->isAuditFailure(), $uAce->isAuditFailure());
     }
 
+    public function testSerializeUnserializeMoreAceWithSameSecurityIdentity()
+    {
+        $sid = $this->getSid();
+
+        $aceFirst = $this->getAce(null, $sid);
+        $aceSecond = $this->getAce(null, $sid);
+
+        // as used in DoctrineAclCache::putInCache (line 142)
+        $serialized = serialize([[
+            'fieldOne' => [$aceFirst],
+            'fieldTwo' => [$aceSecond],
+        ]]);
+
+        $unserialized = unserialize($serialized);
+        $uAceFirst = $unserialized[0]['fieldOne'][0];
+        $uAceSecond = $unserialized[0]['fieldTwo'][0];
+
+        $this->assertInstanceOf(SecurityIdentityInterface::class, $uAceFirst->getSecurityIdentity());
+        $this->assertInstanceOf(SecurityIdentityInterface::class, $uAceSecond->getSecurityIdentity());
+    }
+
     protected function getAce($acl = null, $sid = null)
     {
         if (null === $acl) {