public async Task <ActionResult <ResourceCollection <FolderResource> > > GetAsync(
[FromQuery] int limit = 100, [FromQuery] string nextPageToken = "")
{
try
{
var query = new ReadFoldersQuery(limit, nextPageToken);
var response = await mediator.Send(query);
var folders = response.Items.Select(x => new FolderResource(x)).ToArray();
foreach (var folder in folders)
{
folder.EnrichWithLinks(this);
}
var foldersCollection = new ResourceCollection <FolderResource>(folders, response.NextPageToken);
foldersCollection.AddLinks(
new Link("self", this.Url.Link("GetFolders", new { Limit = limit, NextPageToken = nextPageToken })),
response.NextPageToken != null
? new Link("next", this.Url.Link("GetFolders", new { Limit = limit, NextPageToken = response.NextPageToken }))
: new Link("next", null),
new Link("post", this.Url.Link("CreateFolder", null))
);
return(foldersCollection);
}
catch (InvalidNextPageTokenRequestException)
{
return(BadRequest(new { Message = "The provided Next Page Token is invalid." }));
}
}
public void ReadFolders_NextPageTokenIsInvalid_ThrowsInvalidNextPageTokenRequestException()
{
var query = new ReadFoldersQuery(100, Guid.NewGuid().ToString());
var queryHandler = ReadFoldersQueryHandlerFactory.CreateForInvalidNextPageTokenRepositoryException();
Should.Throw <InvalidNextPageTokenRequestException>(
async() => await queryHandler.Handle(query, CancellationToken.None));
}
public async Task ReadFolders_NoFoldersExist_EmptyPageIsReturned()
{
var foldersPagedSeed = new PaginatedResult <FolderDto>(new List <FolderDto>(), null);
var query = new ReadFoldersQuery();
var queryHandler = ReadFoldersQueryHandlerFactory.Create(foldersPagedSeed);
var response = await queryHandler.Handle(query, CancellationToken.None);
response.Items.Count.ShouldBe(0);
response.NextPageToken.ShouldBeNull();
}
public async Task ReadFolders_ThreeFoldersExist_ThreeFoldersAreRetrieved()
{
var foldersPagedSeed = GetFoldersSeed();
var query = new ReadFoldersQuery();
var queryHandler = ReadFoldersQueryHandlerFactory.Create(foldersPagedSeed);
var response = await queryHandler.Handle(query, CancellationToken.None);
response.Items.Count.ShouldBe(foldersPagedSeed.Items.Count);
response.NextPageToken.ShouldBe(foldersPagedSeed.NextPageToken);
foreach (var item in response.Items)
{
foldersPagedSeed.Items.ShouldContain(
x => x.Id == item.Id &&
x.CreationDate == item.CreationDate &&
x.Name == item.Name &&
x.ParentId == item.ParentId);
}
}