public async Task InvokeAsync_With_SyncCompletingHandler()
{
var service = new FooService();
var called = 0;
String arg = null;
var subscription = service.Changed.SubscribeWeak(
async x => {
arg = x;
called++;
}
);
Check.That(subscription)
.IsInstanceOf <FuncSubscription <String> >();
Check.That(((FuncSubscription <String>)subscription).TestingGetPreviousSubscription())
.IsInstanceOf <WeakSubscription <String> >();
var flag1 = await service.DoAsync("abc");
Check.That(flag1)
.IsTrue();
Check.That(called)
.IsEqualTo(1);
Check.That(arg)
.IsEqualTo("abc");
called = 0;
var flag2 = await service.DoAsync("def");
Check.That(flag2)
.IsTrue();
Check.That(called)
.IsEqualTo(1);
Check.That(arg)
.IsEqualTo("def");
Check.That(service.ChangedSource.NumberOfSubscriptions)
.IsEqualTo(1);
Check.That(service.ChangedSource.IsDisposed)
.IsFalse();
}
public async Task Invoke_With_HandlerThrowingException_BeforeAwait()
{
var service = new FooService();
var called = 0;
String arg = null;
var subscription = service.Changed.SubscribeWeak(
async x => {
arg = x;
called++;
if (called == 1)
{
throw new ApplicationException();
}
await Task.Yield();
}
);
Check.That(subscription)
.IsInstanceOf <FuncSubscription <String> >();
Check.That(((FuncSubscription <String>)subscription).TestingGetPreviousSubscription())
.IsInstanceOf <WeakSubscription <String> >();
Exception exception = null;
using (EventSystem.UnobservedException.SubscribeWeak(
x => Volatile.Write(ref exception, x)
))
{
var flag1 = await service.DoAsync("abc");
Check.That(flag1)
.IsTrue();
Check.That(called)
.IsEqualTo(1);
Check.That(arg)
.IsEqualTo("abc");
Check.That(Volatile.Read(ref exception))
.IsInstanceOf <ApplicationException>();
Check.That(service.ChangedSource.NumberOfSubscriptions)
.IsEqualTo(1);
Check.That(service.ChangedSource.IsDisposed)
.IsFalse();
}
}
public async Task Invoke_With_AlreadyCanceledHandler()
{
var service = new FooService();
var called = 0;
String arg = null;
var subscription = service.Changed.SubscribeWeak(
x => {
arg = x;
called++;
var cts = new CancellationTokenSource();
cts.Cancel();
return(Task.FromCanceled(cts.Token));
}
);
Check.That(subscription)
.IsInstanceOf <FuncSubscription <String> >();
Check.That(((FuncSubscription <String>)subscription).TestingGetPreviousSubscription())
.IsInstanceOf <WeakSubscription <String> >();
Exception exception = null;
using (EventSystem.UnobservedException.SubscribeWeak(
x => Volatile.Write(ref exception, x)
))
{
var flag1 = await service.DoAsync("abc");
Check.That(flag1)
.IsTrue();
Check.That(called)
.IsEqualTo(1);
Check.That(arg)
.IsEqualTo("abc");
Check.That(Volatile.Read(ref exception))
.IsNull();
Check.That(service.ChangedSource.NumberOfSubscriptions)
.IsEqualTo(1);
Check.That(service.ChangedSource.IsDisposed)
.IsFalse();
}
}
public async Task Invoke_With_AlreadyCompletedHandler()
{
var service = new FooService();
var called = 0;
String arg = null;
var subscription = service.Changed.Subscribe(
x => {
arg = x;
called++;
return(Task.CompletedTask);
}
);
Check.That(subscription)
.IsInstanceOf <FuncSubscription <String> >();
Check.That(((FuncSubscription <String>)subscription).TestingGetPreviousSubscription())
.IsNull();
var flag1 = await service.DoAsync("abc");
Check.That(flag1)
.IsTrue();
Check.That(called)
.IsEqualTo(1);
Check.That(arg)
.IsEqualTo("abc");
Check.That(service.ChangedSource.NumberOfSubscriptions)
.IsEqualTo(1);
Check.That(service.ChangedSource.IsDisposed)
.IsFalse();
}
public async Task InvokeAsync_After_SubscriptionGCed()
{
var service = new FooService();
var called = 0;
String arg = null;
var subscription = service.Changed.SubscribeWeak(
async x => {
arg = x;
called++;
await Task.Yield();
}
);
Check.That(subscription)
.IsNotNull();
Check.That(subscription)
.IsInstanceOf <FuncSubscription <String> >();
Check.That(((FuncSubscription <String>)subscription).TestingGetPreviousSubscription())
.IsInstanceOf <WeakSubscription <String> >();
var strongSub = (FuncSubscription <String>)subscription;
var weakSub = (WeakSubscription <String>)strongSub.TestingGetPreviousSubscription();
strongSub.TestingClearNextSubscription();
weakSub.TestingClearNextSubscription();
var flag1 = await service.DoAsync("abc");
Check.That(flag1)
.IsTrue();
Check.That(called)
.IsEqualTo(0);
Check.That(service.ChangedSource.NumberOfSubscriptions)
.IsEqualTo(0);
Check.That(service.ChangedSource.IsDisposed)
.IsFalse();
var flag2 = await service.DoAsync("abc");
Check.That(flag2)
.IsFalse();
Check.That(called)
.IsEqualTo(0);
Check.That(service.ChangedSource.NumberOfSubscriptions)
.IsEqualTo(0);
Check.That(subscription)
.IsNotNull();
Check.That(subscription)
.IsInstanceOf <FuncSubscription <String> >();
Check.That(((FuncSubscription <String>)subscription).TestingGetPreviousSubscription())
.IsNull();
}
