public async Task WithTaskFactory_When_Tasks_Added_Then_Execution_Time_Of_The_Tasks_Does_Not_Intersect()
{
const int NUMBER_OF_TASKS = 100;
const int DEFAULT_THREAD_SLEEP = 20;
const int BEGIN_TASK_THREAD_SLEEP = 1;
var tasks = Enumerable.Range(0, NUMBER_OF_TASKS)
.Select(i => TestTaskFactory.StartNew(() =>
{
Thread.Sleep(BEGIN_TASK_THREAD_SLEEP);
var startTime = DateTime.Now;
var duration = StopWatchUtils.MeasureActionTime(() => Thread.Sleep(DEFAULT_THREAD_SLEEP));
return(new TimeRange(startTime, duration, isReadOnly: true));
}))
.ToArray();
await Task.WhenAll(tasks);
var timeRanges = tasks.Select(task => task.Result);
var timePeriodCollection = new TimePeriodCollection(timeRanges);
var timePeriodIntersector = new TimePeriodIntersector <TimeRange>();
var intersectPeriods = timePeriodIntersector.IntersectPeriods(timePeriodCollection);
Assert.IsTrue(!intersectPeriods.Any());
}
public async Task WithTaskFactory_When_Tasks_Added_And_Acquiring_DummyLock_Then_All_Tasks_Executed_Sequentially()
{
const int numberOfTasks = 100;
const int DEFAULT_THREAD_SLEEP = 2;
var lockRoot = new object();
var tasks = Enumerable.Range(0, numberOfTasks)
.Select(i => TestTaskFactory.StartNew(() =>
{
var lockTaken = false;
Monitor.TryEnter(lockRoot, ref lockTaken);
try
{
Thread.Sleep(DEFAULT_THREAD_SLEEP);
}
finally
{
if (lockTaken)
{
Monitor.Exit(lockRoot);
}
}
return(lockTaken);
}))
.ToArray();
await Task.WhenAll(tasks);
var executedSequentially = tasks.All(task => task.Result);
Assert.IsTrue(executedSequentially);
}
public async Task WithTaskFactory_When_Tasks_Finished_Then_All_Tasks_Executed_In_Same_Thread()
{
const int NUMBER_OF_TASKS = 1000;
var tasks = Enumerable.Range(0, NUMBER_OF_TASKS)
.Select(_ => TestTaskFactory.StartNew(() => Thread.CurrentThread.ManagedThreadId)).ToArray();
await Task.WhenAll(tasks);
var threadId = tasks.First().Result;
var allTasksInSameThread = tasks.All(task => task.Result == threadId);
Assert.IsTrue(allTasksInSameThread);
}
public async Task Dispatch_When_Called_Inside_Strand_Action_Is_Executed_Inline()
{
var originalTaskThreadId = INVALID_THREAD_ID;
var inDispatchTaskThreadId = INVALID_THREAD_ID;
var task = TestTaskFactory.StartNew(() =>
{
originalTaskThreadId = Thread.CurrentThread.ManagedThreadId;
m_strandScheduler.Dispatch(() => inDispatchTaskThreadId = Thread.CurrentThread.ManagedThreadId).Wait();
});
await task;
Assert.AreNotEqual(INVALID_THREAD_ID, originalTaskThreadId);
Assert.AreNotEqual(INVALID_THREAD_ID, inDispatchTaskThreadId);
Assert.AreEqual(originalTaskThreadId, inDispatchTaskThreadId);
}
public async Task Post_When_Called_Inside_Strand_Action_Is_Posted()
{
var originalTaskId = INVALID_TASK_ID;
var inDispatchTaskId = INVALID_TASK_ID;
Task innerTask = null;
var outerTask = TestTaskFactory.StartNew(() =>
{
originalTaskId = Task.CurrentId.Value;
innerTask = m_strandScheduler.Post(() => inDispatchTaskId = Task.CurrentId.Value);
});
await outerTask;
await innerTask;
Assert.AreNotEqual(INVALID_TASK_ID, originalTaskId);
Assert.AreNotEqual(INVALID_TASK_ID, inDispatchTaskId);
Assert.AreNotEqual(originalTaskId, inDispatchTaskId);
}
public async Task WithTaskFactory_When_Tasks_Added_Then_All_Tasks_Executed_Sequentially()
{
const int numberOfTasks = 10;
const int DEFAULT_THREAD_SLEEP = 200;
var tasks = Enumerable.Range(0, numberOfTasks)
.Select(i => TestTaskFactory.StartNew(() =>
{
Thread.Sleep(DEFAULT_THREAD_SLEEP);
return(DateTime.Now);
}))
.ToArray();
await Task.WhenAll(tasks);
var allTasksExecutedSequentially = tasks.Aggregate(
new
{
Result = true,
PreviousTask = (Task <DateTime>)null
},
(prevResult, currentTask) =>
{
if (!prevResult.Result)
{
return(prevResult);
}
return(new
{
Result = (prevResult.PreviousTask != null
? currentTask.Result > prevResult.PreviousTask.Result : prevResult.Result),
PreviousTask = currentTask
});
},
resultPair => resultPair.Result);
Assert.IsTrue(allTasksExecutedSequentially);
}
