How to unit test DataContractSerializer?

I created my own serializer, here is the code:

public class BackgroundJobInfoSerializer : IBackgroundJobInfoSerializer
{
    private static readonly DataContractSerializer Serializer =
        new DataContractSerializer(typeof(BackgroundJobInfo),
                                   null,
                                   int.MaxValue,
                                   false,
                                   false,
                                   new MongoDbSurrogate());

    public string Serialize(BackgroundJobInfo info)
    {
        if (info == null)
        {
            throw new ArgumentNullException("info", BackgroundJobsLocalization.BackgroundJobInfoIsNull);
        }

        var stringBuilder = new StringBuilder();
        using (var stringWriter = new StringWriter(stringBuilder, CultureInfo.InvariantCulture))
        {
            var writer = XmlWriter.Create(stringWriter);
            Serializer.WriteObject(writer, info);
            writer.Flush();
        }

        return stringBuilder.ToString();
    }

    public BackgroundJobInfo Deserialize(string info){...}

Now I would like to create a unit test. But I'm wondering how to test it?

What are common test cases should I check to be ensure that everything works fine?