public async Task VerifyEvents()
{
var listener = new TestListener();
var observer = new TestObserver(listener);
using (DiagnosticListener.AllListeners.Subscribe(observer))
{
// arrange
var batchScheduler = new ManualBatchScheduler();
var loader = new DataLoader <string, string>(batchScheduler, FetchDataAsync);
var errorLoader = new DataLoader <string, string>(
batchScheduler,
(keys, cancellationToken) =>
throw new Exception("BatchError: Foo"));
// act
var tasks = new Task[]
{
Catch(() => loader.LoadAsync("Foo")),
Catch(() => loader.LoadAsync("Foo", "Bar")),
Catch(() => loader.LoadAsync("Bar", "Baz")),
Catch(() => loader.LoadAsync("Qux")),
Catch(() => errorLoader.LoadAsync("Foo"))
};
batchScheduler.Dispatch();
await Task.WhenAll(tasks).ConfigureAwait(false);
// assert
listener.MatchSnapshot();
}
}
public async Task VerifyEvents()
{
var listener = new TestListener();
var observer = new TestObserver(listener);
using (DiagnosticListener.AllListeners.Subscribe(observer))
{
// arrange
var batchOptions = new DataLoaderOptions <string>
{
AutoDispatching = true,
Batching = true,
BatchRequestDelay = TimeSpan.FromMilliseconds(150),
Caching = true
};
var batchLoader = new DataLoader <string, string>(
batchOptions,
FetchDataAsync);
var batchErrorLoader = new DataLoader <string, string>(
batchOptions,
(keys, cancellationToken) =>
throw new Exception("BatchError: Foo"));
var singleOptions = new DataLoaderOptions <string>
{
AutoDispatching = true,
Batching = false,
Caching = true
};
var singleLoader = new DataLoader <string, string>(
singleOptions,
FetchDataAsync);
// act
await Catch(() => batchLoader.LoadAsync("Foo"))
.ConfigureAwait(false);
await Task.Delay(400).ConfigureAwait(false);
await Catch(() => batchLoader.LoadAsync("Foo", "Bar"))
.ConfigureAwait(false);
await Task.Delay(400).ConfigureAwait(false);
await Catch(() => batchLoader.LoadAsync("Bar", "Baz"))
.ConfigureAwait(false);
await Task.Delay(400).ConfigureAwait(false);
await Catch(() => batchLoader.LoadAsync("Qux"))
.ConfigureAwait(false);
await Task.Delay(400).ConfigureAwait(false);
await Catch(() => batchErrorLoader.LoadAsync("Foo"))
.ConfigureAwait(false);
await Task.Delay(400).ConfigureAwait(false);
await Catch(() => singleLoader.LoadAsync("Foo"))
.ConfigureAwait(false);
await Task.Delay(400).ConfigureAwait(false);
await Catch(() => singleLoader.LoadAsync("Foo", "Bar"))
.ConfigureAwait(false);
await Task.Delay(400).ConfigureAwait(false);
await Catch(() => singleLoader.LoadAsync("Bar", "Baz"))
.ConfigureAwait(false);
await Task.Delay(400).ConfigureAwait(false);
await Catch(() => singleLoader.LoadAsync("Qux"))
.ConfigureAwait(false);
// assert
listener.MatchSnapshot();
}
}