public async Task ExecuteAsync_ElementIsMissingFromFetchDictionary_ShouldResolveLoadAsyncWithDefaultValue()
{
var loader = new KeyedDataLoader <Guid, Book>(_contextMock.Object,
(keys, token) => Task.FromResult <IReadOnlyDictionary <Guid, Book> >(new Dictionary <Guid, Book>()));
var task = loader.LoadAsync(Guid.NewGuid());
await await((IExecutableDataLoader)loader).ExecuteAsync(CancellationToken.None);
Assert.That(task.IsCompleted, Is.True);
Assert.That(task.Result, Is.EqualTo(null));
}
public void SetUp()
{
_contextMock = new Mock <IDataLoaderContext>();
_fetchCalls = new List <Tuple <Guid[], CancellationToken> >();
_loader = new KeyedDataLoader <Guid, Book>(
_contextMock.Object,
(keys, token) =>
{
_fetchCalls.Add(new Tuple <Guid[], CancellationToken>(keys.ToArray(), token));
return(Task.FromResult <IReadOnlyDictionary <Guid, Book> >(keys.Select(id => new Book
{
Id = id,
Title = $"SomeTitle",
Author = $"SomeAuthor"
}).ToDictionary(x => x.Id)));
});
}
