public void ObtainCertification()
{
var certification = new Certification(5, "MCTS", "Microsoft Certified Technical Specialist in SQL Server 2008, Database Development");
_student.ObtainCertification(certification);
var firstObtainCertification = _student.CertificationsObtained.Single();
Assert.Equal(_certificationDescription, firstObtainCertification.Certification.CertificationDescription);
}