public void AssignTutorErrorTest2()
{
//// Arrange
var errors = new List <string>();
var mockRepository = new Mock <InterfaceInstructorRepository>();
var instructorService = new InstructorService(mockRepository.Object);
//// Act
instructorService.AssignTutor(-1, 1, ref errors);
//// Assert
Assert.AreEqual(1, errors.Count);
}
