public async Task SearchByDateTest1()
        {
            SetMockContext("jablonskim");
            DateSearchingModel model = new DateSearchingModel()
            {
                MinimalDate = new DateTime(2015, 12, 20),
                SortBy      = SortBy.Price,
                SortType    = SortType.Ascending,
                Username    = "******",
                ShowPartiallyMatchingResults = true
            };

            var result = await _controller.Date(model);

            Assert.IsNotNull(result);
            Assert.AreEqual(2, model.Offers.Count());
        }