public async Task TestOrderMaintained()
{
foreach (bool sync in DataflowTestHelpers.BooleanValues)
{
foreach (bool singleProducerConstrained in DataflowTestHelpers.BooleanValues)
{
var options = new ExecutionDataflowBlockOptions {
SingleProducerConstrained = singleProducerConstrained
};
int prev = -1;
Action <int> body = i =>
{
Assert.Equal(expected: prev + 1, actual: i);
prev = i;
};
ActionBlock <int> ab = sync ?
new ActionBlock <int>(body, options) :
new ActionBlock <int>(i => TaskShim.Run(() => body(i)), options);
ab.PostRange(0, 100);
ab.Complete();
await ab.Completion;
}
}
}
public async Task TestOperationCanceledExceptionsIgnored()
{
foreach (bool sync in DataflowTestHelpers.BooleanValues)
{
foreach (bool singleProducerConstrained in DataflowTestHelpers.BooleanValues)
{
var options = new ExecutionDataflowBlockOptions {
SingleProducerConstrained = singleProducerConstrained
};
int sumOfOdds = 0;
Action <int> body = i =>
{
if ((i % 2) == 0)
{
throw new OperationCanceledException();
}
sumOfOdds += i;
};
ActionBlock <int> ab = sync ?
new ActionBlock <int>(body, options) :
new ActionBlock <int>(async i => { await TaskShim.Yield(); body(i); }, options);
const int MaxValue = 10;
ab.PostRange(0, MaxValue);
ab.Complete();
await ab.Completion;
Assert.Equal(
expected: Enumerable.Range(0, MaxValue).Where(i => i % 2 != 0).Sum(),
actual: sumOfOdds);
}
}
}
public async Task TestSchedulerUsage()
{
foreach (bool singleProducerConstrained in DataflowTestHelpers.BooleanValues)
{
var scheduler = new ConcurrentExclusiveSchedulerPair().ExclusiveScheduler;
var sync = new ActionBlock <int>(_ => Assert.Equal(scheduler.Id, TaskScheduler.Current.Id),
new ExecutionDataflowBlockOptions
{
TaskScheduler = scheduler,
SingleProducerConstrained = singleProducerConstrained
});
sync.PostRange(0, 10);
sync.Complete();
await sync.Completion;
var async = new ActionBlock <int>(_ =>
{
Assert.Equal(scheduler.Id, TaskScheduler.Current.Id);
return(TaskShim.FromResult(0));
}, new ExecutionDataflowBlockOptions
{
TaskScheduler = scheduler,
SingleProducerConstrained = singleProducerConstrained
});
async.PostRange(0, 10);
async.Complete();
await async.Completion;
}
}
public async Task TestFaulting()
{
for (int trial = 0; trial < 3; trial++)
{
foreach (bool singleProducerConstrained in DataflowTestHelpers.BooleanValues)
{
var options = new ExecutionDataflowBlockOptions {
SingleProducerConstrained = singleProducerConstrained
};
Action thrower = () => { throw new InvalidOperationException(); };
ActionBlock <int> ab = null;
switch (trial)
{
case 0: ab = new ActionBlock <int>(i => thrower(), options); break;
case 1: ab = new ActionBlock <int>(i => { thrower(); return(Task.FromResult(0)); }, options); break;
case 2: ab = new ActionBlock <int>(i => Task.Run(thrower), options); break;
}
ab.PostRange(0, 4);
try
{
await ab.Completion;
Assert.True(false, "Should always throw IOE");
}
catch (InvalidOperationException) { }
Assert.Equal(expected: 0, actual: ab.InputCount);
Assert.False(ab.Post(5));
}
}
}
public async Task TestNullReturnedTasks()
{
int sumOfOdds = 0;
var ab = new ActionBlock <int>(i => {
if ((i % 2) == 0)
{
return(null);
}
return(Task.Run(() => { sumOfOdds += i; }));
});
const int MaxValue = 10;
ab.PostRange(0, MaxValue);
ab.Complete();
await ab.Completion;
Assert.Equal(
expected: Enumerable.Range(0, MaxValue).Where(i => i % 2 != 0).Sum(),
actual: sumOfOdds);
}
public async Task TestParallelExecution()
{
int dop = 2;
foreach (bool sync in DataflowTestHelpers.BooleanValues)
{
foreach (bool singleProducerConstrained in DataflowTestHelpers.BooleanValues)
{
Barrier barrier = new Barrier(dop);
var options = new ExecutionDataflowBlockOptions {
MaxDegreeOfParallelism = dop, SingleProducerConstrained = singleProducerConstrained
};
ActionBlock <int> ab = sync ?
new ActionBlock <int>(_ => barrier.SignalAndWait(), options) :
new ActionBlock <int>(_ => TaskShim.Run(() => barrier.SignalAndWait()), options);
int iters = dop * 4;
ab.PostRange(0, iters);
ab.Complete();
await ab.Completion;
}
}
}
public async Task TestNullReturnedTasks()
{
int sumOfOdds = 0;
var ab = new ActionBlock<int>(i => {
if ((i % 2) == 0) return null;
return Task.Run(() => { sumOfOdds += i; });
});
const int MaxValue = 10;
ab.PostRange(0, MaxValue);
ab.Complete();
await ab.Completion;
Assert.Equal(
expected: Enumerable.Range(0, MaxValue).Where(i => i % 2 != 0).Sum(),
actual: sumOfOdds);
}
public async Task TestSchedulerUsage()
{
foreach (bool singleProducerConstrained in DataflowTestHelpers.BooleanValues)
{
var scheduler = new ConcurrentExclusiveSchedulerPair().ExclusiveScheduler;
var sync = new ActionBlock<int>(_ => Assert.Equal(scheduler.Id, TaskScheduler.Current.Id),
new ExecutionDataflowBlockOptions
{
TaskScheduler = scheduler,
SingleProducerConstrained = singleProducerConstrained
});
sync.PostRange(0, 10);
sync.Complete();
await sync.Completion;
var async = new ActionBlock<int>(_ => {
Assert.Equal(scheduler.Id, TaskScheduler.Current.Id);
return Task.FromResult(0);
}, new ExecutionDataflowBlockOptions
{
TaskScheduler = scheduler,
SingleProducerConstrained = singleProducerConstrained
});
async.PostRange(0, 10);
async.Complete();
await async.Completion;
}
}