public async Task GetItemsFromCart_WhenCalled_WithNoItems_ShouldEventually_ReturnServiceError()
{
var expected = Some(PagedResult <CartItem> .CreateEmptyResult());
var repositoryMock = new Mock <IRepository <CartItem> >();
repositoryMock.Setup(mock => mock.GetAll(It.IsAny <int>(), It.IsAny <int>()))
.Returns(expected);
var sut = _fixture.Initialize(repositoryMock.Object);
var currPage = 0;
var pageSize = 40;
await match(sut.GetItemsFromCart(currPage, pageSize),
Right : r => Assert.Equal(expected, r),
Left : _ => Assert.False(true, "Should't get here!")
);
repositoryMock.Verify(
mock => mock.GetAll(
It.Is <int>(num => num == currPage),
It.Is <int>(num => num == pageSize)),
Times.Once()
);
}
public EitherAsync <Exception, Option <PagedResult <CartItem> > > GetAll(
int pageNumber = 0, int pageSize = 200
) =>
match(_dbClient.GetDocumentsAsync(pageNumber, pageSize),
Some: items => {
var totalCount = items.Count();
var totalPages = (long)Math.Ceiling((double)(totalCount / pageSize));
var collection = new PagedResult <CartItem>(items, totalCount, totalPages, pageNumber + 1);
return(Right <Exception, Option <PagedResult <CartItem> > >(Some(collection)));
},
None: () => Right <Exception, Option <PagedResult <CartItem> > >(Some(PagedResult <CartItem> .CreateEmptyResult())),
Fail: ex => Left <Exception, Option <PagedResult <CartItem> > >(ex)
).ToAsync();
public EitherAsync <ServiceError, PagedResult <CartItem> > GetItemsFromCart(
int currentPage = 0, int pageSize = 40
) =>
match(Repository.GetAll(currentPage, pageSize),
Right: option => match(option,
Some: items => Right <ServiceError, PagedResult <CartItem> >(items),
None: () => Right <ServiceError, PagedResult <CartItem> >(PagedResult <CartItem> .CreateEmptyResult())),
Left: ex => Left <ServiceError, PagedResult <CartItem> >(new ServiceError(ex.Message, ServiceErrorCode.UnknownException))
).ToAsync();
