public void Should_Start_At_Most_Limit_Operations_In_Parallel()
{
var tcsArray = GetTaskCompletionSources <bool>(100);
var counter = 0;
Func <long, Task> method = index =>
{
Interlocked.Increment(ref counter);
return(tcsArray[index % tcsArray.Length].Task);
};
var timesTask = ConcurrentUtils.Times(1000, 10, method);
Assert.AreEqual(TaskStatus.WaitingForActivation, timesTask.Status);
Assert.AreEqual(Volatile.Read(ref counter), 10);
for (var i = 0; i < 10; i++)
{
tcsArray[i].SetResult(true);
Assert.AreEqual(Volatile.Read(ref counter), 11 + i);
}
Assert.AreEqual(TaskStatus.WaitingForActivation, timesTask.Status);
for (var i = 10; i < tcsArray.Length; i++)
{
tcsArray[i].SetResult(true);
}
Assert.AreEqual(TaskStatus.RanToCompletion, timesTask.Status);
Assert.AreEqual(Volatile.Read(ref counter), 1000);
}
public async Task Should_Complete_Task_When_All_Tasks_Are_Completed()
{
var tcs1 = new TaskCompletionSource <bool>();
var tcs2 = new TaskCompletionSource <bool>();
var indexes = new long?[1000];
Func <long, Task> method = index =>
{
indexes[index] = index;
if (index == 5)
{
return(tcs2.Task);
}
return(tcs1.Task);
};
var timesTask = ConcurrentUtils.Times(1000, 10, method);
Assert.AreEqual(TaskStatus.WaitingForActivation, timesTask.Status);
tcs1.SetResult(true);
Assert.AreEqual(TaskStatus.WaitingForActivation, timesTask.Status);
await Task.Delay(40);
Assert.AreEqual(TaskStatus.WaitingForActivation, timesTask.Status);
// Assert that all the indexes where passed starting from 0
for (long i = 0; i < indexes.Length; i++)
{
Assert.AreEqual(i, indexes[i]);
}
tcs2.SetResult(true);
Assert.AreEqual(TaskStatus.RanToCompletion, timesTask.Status);
}
public void Should_Fault_Task_When_Any_Of_The_Tasks_Are_Faulted()
{
var tcs1 = new TaskCompletionSource <bool>();
var tcs2 = new TaskCompletionSource <bool>();
Func <long, Task> method = index =>
{
if (index == 15)
{
return(tcs2.Task);
}
return(tcs1.Task);
};
var timesTask = ConcurrentUtils.Times(1000, 10, method);
Assert.AreEqual(TaskStatus.WaitingForActivation, timesTask.Status);
tcs1.SetResult(true);
Assert.AreEqual(TaskStatus.WaitingForActivation, timesTask.Status);
var ex = new Exception("Test exception");
tcs2.SetException(ex);
Assert.AreEqual(TaskStatus.Faulted, timesTask.Status);
Assert.AreEqual(ex, timesTask.Exception.InnerException);
}