public async Task TrySubscribeToData_works_when_using_matching_types()
{
var factory = new DataLoaderBuilderFactory(b => b
.TrySubscribeToData <ITestData>((data, setter) => data.Subscribe(s => setter.SetData(data)))
);
var builder = factory
.CreateTyped <MyData>()
.WithName("Loader")
.WithLoadMethod(Load);
var dataLoader = builder.Build();
// The recipe is applicable when a SubscribeToDataTrigger has been added to the DataLoader.
Assert.Contains(dataLoader.Triggers, t => t is SubscribeToDataTrigger);
var data = await dataLoader.Load(CancellationToken.None);
Assert.True(data.IsSubscribed);
async Task <MyData> Load(CancellationToken ct, IDataLoaderRequest request)
{
return(new MyData());
}
}
public void TrySubscribeToData_doesnt_work_on_untyped_builders()
{
var factory = new DataLoaderBuilderFactory(b => b
.TrySubscribeToData <ITestData>((data, setter) => data.Subscribe(s => setter.SetData(data)))
);
// Using Create() instead of CreateTyped() must log an error and not apply the recipe.
var builder = factory
.Create()
.WithName("Loader")
.WithLoadMethod(Load);
Assert.DoesNotContain(builder.DelegatingStrategies, s => s is SubscribeToDataStrategy);
async Task <object> Load(CancellationToken ct, IDataLoaderRequest request)
{
return(new MyData());
}
}
public async Task TrySubscribeToData_doesnt_work_when_using_non_matching_types()
{
var factory = new DataLoaderBuilderFactory(b => b
.TrySubscribeToData <ITestData>((data, setter) => data.Subscribe(s => setter.SetData(data)))
);
var builder = factory
.CreateTyped <string>()
.WithName("Loader")
.WithLoadMethod(Load);
var dataLoader = builder.Build();
// The triggers must not contain the SubscribeToDataTrigger because the recipe doesn't apply for a DataLoader of string.
Assert.DoesNotContain(dataLoader.Triggers, t => t is SubscribeToDataTrigger);
async Task <string> Load(CancellationToken ct, IDataLoaderRequest request)
{
return(string.Empty);
}
}
private static IDataLoader <MyData> GetHappyPathDataLoader()
{
var factory = new DataLoaderBuilderFactory(b => b
.TrySubscribeToData <ITestData>((data, setter) => data.Subscribe(s => setter.SetData(data)))
);
var builder = factory
.CreateTyped <MyData>()
.WithEmptySelector(state => state.Data?.Message == null)
.WithName("Loader")
.WithLoadMethod(Load);
var dataLoader = builder.Build();
return(dataLoader);
async Task <MyData> Load(CancellationToken ct, IDataLoaderRequest request)
{
return(new MyData());
}
}
