public async Task TryBulkAddEntriesAsync_ExistingTrackerId_ReturnsTrue()
        {
            // arrange
            var service   = new TrackerLogService(_database, _logger);
            int trackerId = 1;
            var days      = new[]
            {
                new DateTime(2020, 1, 1),
                new DateTime(2020, 2, 2),
                DateTime.Now
            };

            // act
            bool successful = await service.TryBulkAddEntriesAsync(days, trackerId);

            // assert
            Assert.True(successful);
        }
        public async Task TryBulkAddEntriesAsync_ExistingTrackerId_AddsToDb()
        {
            // arrange
            var service   = new TrackerLogService(_database, _logger);
            int trackerId = 3; // tracker with no existing logged days
            var days      = new[]
            {
                new DateTime(2020, 1, 1),
                new DateTime(2020, 2, 2),
                DateTime.Now
            };

            // act
            await service.TryBulkAddEntriesAsync(days, trackerId);

            var loggedDays = (await service.TryGetAllLoggedDaysAsync(trackerId))
                             .Select(day => day.Date)
                             .OrderBy(day => day);

            // assert
            Assert.Equal(days, loggedDays);
        }