unit test a repository service layer

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LINQ

MVC4

unit-testing

i have a service lyk below:

public class SubjectService : ISubjectService
    {        
        private readonly ISubjectRepository subjectRepository;
        public SubjectService(ISubjectRepository subjectRepository)
        {
            this.broadSubjectAreaRepository = broadSubjectAreaRepository;
        }
        public IQueryable<Subject> GetSubjectByFilter(Expression<Func<Subject, bool>> where)
        {
            var subject = this.subjectRepository.GetMany(where);
            return subject;
        }
    }

the GetMany is defined in the repository implementation like this-

public virtual IQueryable<T> GetMany(Expression<Func<T, bool>> where)
    {       
        return dbset.Where(where);
    }

i had written a unit test for the service like this-

[TestMethod()]
        public void GetByFilter_ShouldReturn_ListofSubject_AfterApplyingFilters()
        {
            var subject = new Subject()
            {
                Id = 3,
                Name = "Physics",
                SubjectCode = "PHY",
                StatusId = 1
            };

            var list = CreateList();
            var mockrepository = new Mock<ISubjectRepository>();
            mockrepository.Setup(p => p.GetMany( l => l.Name.Trim().ToUpper() == subject.Name.Trim().ToUpper() && l.Id != subject.Id)).Returns(list.AsQueryable());
      
            var service = new SubjectService(mockrepository.Object); 

            var filter = service.GetSubjectByFilter( l => l.Name.Trim().ToUpper() == subject.Name.Trim().ToUpper() && l.Id != subject.Id).ToList();

            Assert.AreEqual(1,filter.Count());
        }   

        private static List<Subject> CreateList()
        {
            var list = new List<Subject>()
            {
           new Subject{Id = 1,Name ="Physics", SubjectCode ="PHY", StatusId=1},
           new Subject{Id = 2, Name ="Chemistry", SubjectCode ="CHEM", StatusId =1},
           new Subject{Id = 3, Name ="English", SubjectCode ="ENG", StatusId=0}                
            };
            return list;
        }

can anyone verify the test let me know if whether i am going wrong anywhere???