public void EnrollmentErrorTest()
        {
            //// Arranage
            var errors            = new List <string>();
            var mockRepository    = new Mock <IEnrollmentRepository>();
            var enrollmentService = new EnrollmentService(mockRepository.Object);

            //// Act
            enrollmentService.GetEnrollmentInfo(null, -1, ref errors);

            //// Assert
            Assert.AreEqual(1, errors.Count);
        }