public async Task Event_Throttler_TResult()
{
var et = new EventThrottler <int>();
Func <Task <int> > f1 = async() => { Debug.WriteLine("Starting 1"); await Task.Delay(50); Debug.WriteLine("Ending 1"); return(1); };
Func <Task <int> > f2 = async() => { Debug.WriteLine("Starting 2"); await Task.Delay(50); Debug.WriteLine("Ending 2"); return(2); };
Func <Task <int> > f3 = async() => { Debug.WriteLine("Starting 3"); await Task.Delay(50); Debug.WriteLine("Ending 3"); return(3); };
var t1 = et.RunAsync(f1, -1);
var t2 = et.RunAsync(f2, -2);
var t3 = et.RunAsync(f3, -3);
Assert.AreEqual(await t1, 1);
Assert.AreEqual(await t2, -2);
Assert.AreEqual(await t3, 3);
}
private async Task <bool> ThrottledGoBackAsync()
{
if (_isNavigating)
{
//Debug.Assert(false, "Navigation already in progress.");
return(false);
//throw new InvalidOperationException("Navigation already in progress.");
}
if (!this.CanGoBack)
{
//Debug.Assert(false, "GoBack() call failed. CanGoBack is false.");
return(false);
//throw new InvalidOperationException("GoBack() call failed. CanGoBack is false.");
}
if (!this.CanNavigate)
{
//Debug.Assert(false, "GoBack() call failed. CanNavigate is false.");
return(false);
//throw new InvalidOperationException("GoBack() call failed. CanNavigate is false.");
}
var backJournalEntry = this.BackStack.Peek();
return(await _navigationCallThrottler.RunAsync(() => this.NavigateCoreAsync(
backJournalEntry.SourcePageType,
backJournalEntry.Parameter,
NavigationMode.Back), false));
}