JMSSerializerBug.php

<?php

class Thing
{
    /**
     * @JMS\Type("integer")
     */
    private $fooBar;

    public function getFooBar()
    {
        return $this->fooBar;
    }
}

$json = '{"fooBar": 123}';
$deserializedThing = $serializer->deserialize($json, 'Thing', 'json');

assert(123, $deserializedThing->getFooBar()); 
// FAILS, we get null instead
// Adding @JMS\SerializedName("fooBar") resolves the issue
// Internally, the serializer converts fooBar to foo_bar unless instructed otherwise

Moved to schmittjoh/serializer#33