public async Task CallFilterTournamentsAsync_WhenCalled()
        {
            // Arrange
            Mock <ITournamentService> tournamentServiceMock = new Mock <ITournamentService>();
            Mock <IPDFService>        pDFServiceMock        = new Mock <IPDFService>();
            Mock <IMemoryCache>       memoryCacheMock       = new Mock <IMemoryCache>();

            string validSortOrder  = string.Empty;
            string validFilter     = string.Empty;
            int    validPageNumber = 1;
            int    validPageSize   = 10;

            IPagedList <Tournament> tournaments = new PagedList <Tournament>(new List <Tournament>().AsQueryable(), validPageNumber, validPageSize);

            tournamentServiceMock.Setup(mock => mock.FilterTournamentsAsync(validSortOrder, validFilter, validPageNumber, validPageSize))
            .Returns(Task.FromResult(tournaments));

            TournamentController SUT = new TournamentController(
                tournamentServiceMock.Object,
                pDFServiceMock.Object,
                memoryCacheMock.Object);

            // Act
            await SUT.Filter(validSortOrder, validFilter, validPageNumber, validPageSize);

            // Assert
            tournamentServiceMock
            .Verify(mock => mock.FilterTournamentsAsync(validSortOrder, validFilter, validPageNumber, validPageSize),
                    Times.Once);
        }
        public async Task ReturnCorrectViewModel_WhenCalled()
        {
            // Arrange
            Mock <ITournamentService> tournamentServiceMock = new Mock <ITournamentService>();
            Mock <IPDFService>        pDFServiceMock        = new Mock <IPDFService>();
            Mock <IMemoryCache>       memoryCacheMock       = new Mock <IMemoryCache>();

            string validSortOrder  = string.Empty;
            string validFilter     = string.Empty;
            int    validPageNumber = 1;
            int    validPageSize   = 10;

            IPagedList <Tournament> tournaments = new PagedList <Tournament>(new List <Tournament>().AsQueryable(), validPageNumber, validPageSize);

            tournamentServiceMock.Setup(mock => mock.FilterTournamentsAsync(validSortOrder, validFilter, validPageNumber, validPageSize))
            .Returns(Task.FromResult(tournaments));

            TournamentController SUT = new TournamentController(
                tournamentServiceMock.Object,
                pDFServiceMock.Object,
                memoryCacheMock.Object);

            // Act
            var result = await SUT.Filter(validSortOrder, validFilter, validPageNumber, validPageSize) as PartialViewResult;

            // Assert
            Assert.IsInstanceOfType(result.Model, typeof(TableViewModel <TournamentViewModel>));
        }