// Data, no id match
        public void TestGetCityWrongId()
        {
            PointOfInterest poi1 = new PointOfInterest
            {
                Id          = 1,
                Name        = "Downtown",
                Description = "Lots of food"
            };

            PointOfInterest poi2 = new PointOfInterest
            {
                Id          = 2,
                Name        = "Stanley Park",
                Description = "Lots to do"
            };

            PointOfInterest poi3 = new PointOfInterest
            {
                Id          = 3,
                Name        = "Science World",
                Description = "Lots of science"
            };

            PointOfInterest poi4 = new PointOfInterest
            {
                Id          = 3,
                Name        = "UBC",
                Description = "School"
            };

            var cities = new List <City>
            {
                new City {
                    Id = 1, Name = "Richmond", Description = "Small", PointsOfInterest = { poi1, poi2 }
                },
                new City {
                    Id = 2, Name = "Vancouver", Description = "Big", PointsOfInterest = { poi3, poi4 }
                },
            }.AsQueryable();

            var mockSet = new Mock <DbSet <City> >();

            mockSet.As <IQueryable <City> >().Setup(m => m.Provider).Returns(cities.Provider);
            mockSet.As <IQueryable <City> >().Setup(m => m.Expression).Returns(cities.Expression);
            mockSet.As <IQueryable <City> >().Setup(m => m.ElementType).Returns(cities.ElementType);

            var mockContext = new Mock <CityInfoContext>();

            mockContext.Setup(m => m.Cities).Returns(mockSet.Object);

            var repo = new CityInfoRepository(mockContext.Object);

            Assert.Null(repo.GetCity(3, false));
        }
        // No data, thus no id match
        public void TestGetCityNoCities()
        {
            var cities = new List <City> {
            }.AsQueryable();

            var mockSet = new Mock <DbSet <City> >();

            mockSet.As <IQueryable <City> >().Setup(m => m.Provider).Returns(cities.Provider);
            mockSet.As <IQueryable <City> >().Setup(m => m.Expression).Returns(cities.Expression);
            mockSet.As <IQueryable <City> >().Setup(m => m.ElementType).Returns(cities.ElementType);

            var mockContext = new Mock <CityInfoContext>();

            mockContext.Setup(m => m.Cities).Returns(mockSet.Object);

            var repo = new CityInfoRepository(mockContext.Object);

            Assert.Null(repo.GetCity(3, false));
        }