public void WeeklySummaryIsCorrect()
        {
            DateTime dt1 = new DateTime(2020, 2, 12); //week7
            DateTime dt2 = new DateTime(2020, 3, 18); //week12
            DateTime dt3 = new DateTime(2020, 3, 19); //week12

            Entry u1e1, u2e1, u2e2, u2e3;             //u2e2 means user2:entry2

            _userService.SetUser(_adminUser);
            _context.Add(u1e1 = new Entry()
            {
                Id = 1, DistanceInMeters = 999, TimeInSeconds = 600, Date = dt1, UserId = _regularUser1.Id, User = _regularUser1
            });
            _context.Add(u2e1 = new Entry()
            {
                Id = 2, DistanceInMeters = 1999, TimeInSeconds = 1000, Date = dt1, UserId = _regularUser2.Id, User = _regularUser2
            });
            _context.Add(u2e2 = new Entry()
            {
                Id = 3, DistanceInMeters = 2999, TimeInSeconds = 1500, Date = dt2, UserId = _regularUser2.Id, User = _regularUser2
            });
            _context.Add(u2e3 = new Entry()
            {
                Id = 4, DistanceInMeters = 3999, TimeInSeconds = 1900, Date = dt3, UserId = _regularUser2.Id, User = _regularUser2
            });
            _context.SaveChanges();

            //user 1 summary (only week2)
            _userService.SetUser(_regularUser1);
            var res = ((_controller.WeeklySummaries(dt1, dt3) as OkObjectResult).Value as IEnumerable <WeeklySummaryDTO>).ToArray();

            Assert.AreEqual(2020, res.Single().Year);
            Assert.AreEqual(7, res.Single().Week);
            Assert.AreEqual(u1e1.DistanceInMeters, res.Single().TotalDistanceInMeters);
            Assert.AreEqual(u1e1.TimeInSeconds, res.Single().TotalTimeInSeconds);
            Assert.AreEqual(u1e1.DistanceInMeters / (float)u1e1.TimeInSeconds, res.Single().AverageSpeed);

            //user 2
            _userService.SetUser(_regularUser2);
            res = ((_controller.WeeklySummaries(dt1, dt3) as OkObjectResult).Value as IEnumerable <WeeklySummaryDTO>).ToArray();
            Assert.AreEqual(2, res.Count());
            //--> summary for week 3
            var u2w3 = res.ElementAt(0);

            Assert.AreEqual(2020, u2w3.Year);
            Assert.AreEqual(12, u2w3.Week);
            Assert.AreEqual(u2e2.DistanceInMeters + u2e3.DistanceInMeters, u2w3.TotalDistanceInMeters);
            Assert.AreEqual(u2e2.TimeInSeconds + u2e3.TimeInSeconds, u2w3.TotalTimeInSeconds);
            Assert.AreEqual((u2e2.DistanceInMeters + u2e3.DistanceInMeters) / (float)(u2e2.TimeInSeconds + u2e3.TimeInSeconds), u2w3.AverageSpeed);
            //--> summary for week 2
            var u2w2 = res.ElementAt(1);

            Assert.AreEqual(2020, u2w2.Year);
            Assert.AreEqual(7, u2w2.Week);
            Assert.AreEqual(u2e1.DistanceInMeters, u2w2.TotalDistanceInMeters);
            Assert.AreEqual(u2e1.TimeInSeconds, u2w2.TotalTimeInSeconds);
            Assert.AreEqual(u2e1.DistanceInMeters / (float)u2e1.TimeInSeconds, u2w2.AverageSpeed);
        }