public async Task Using1()
{
var result = "";
await AsyncObservable.Using(() => Disposable.Create(() => result += "3"),
_ => AsyncObservable.Using(() => Disposable.Create(() => result += "2"),
__ => AsyncObservable.Using(() => Disposable.Create(() => result += "1"),
___ => AsyncObservable.Return(Unit.Default))))
.Finally(() => result += "4")
.SubscribeAsync(i => result += "N", ex => result += "E", () => result += "C");
result
.Should().Be("NC1234");
}
public async Task Using2()
{
var cts = new CancellationTokenSource();
var result = "";
var t = AsyncObservable.Using(() => Disposable.Create(() => result += "3"),
_ => AsyncObservable.Using(() => Disposable.Create(() => result += "2"),
__ => AsyncObservable.Using(() => Disposable.Create(() => result += "1"),
___ => AsyncObservable.Never <Unit>())))
.Finally(() => result += "4")
.SubscribeAsync(i => result += "N", ex => result += "E", () => result += "C", ca: cts.Token);
cts.Cancel();
await t;
result
.Should().Be("1234");
}
public void ArgumentExceptions()
{
Func <IDisposable> funcR = null;
Func <IDisposable, IAsyncObservable <int> > funcO = null;
Action action;
action = () => AsyncObservable.Using(funcR, _ => AsyncObservable.Empty <int>());
action
.Should().Throw <ArgumentNullException>();
action = () => AsyncObservable.Using(() => new BooleanDisposable(), funcO);
action
.Should().Throw <ArgumentNullException>();
action = () => AsyncObservable.Using(funcR, funcO);
action
.Should().Throw <ArgumentNullException>();
}