public function testMergeWithManagedDocument()
{
$user = new CmsUser();
$user->username = "beberlei";
$user->name = "Benjamin";
$this->dm->persist($user);
$this->dm->flush();
$mergableUser = new CmsUser();
$mergableUser->id = $user->id;
$mergableUser->username = "jgalt";
$mergableUser->name = "John Galt";
$mergedUser = $this->dm->merge($mergableUser);
$this->assertSame($mergedUser, $user);
$this->assertEquals("jgalt", $mergedUser->username);
}