public void Dispose_ClearsPendingTasks()
{
var scheduler = new TaskDelayScheduler(TimeSpan.FromMilliseconds(50), new IProjectThreadingServiceMock(), CancellationToken.None);
bool taskRan = false;
var task1 = scheduler.ScheduleAsyncTask((ct) =>
{
taskRan = true;
int count = 50;
while (count != 0)
{
ct.ThrowIfCancellationRequested();
Thread.Sleep(20);
--count;
}
return(Task.CompletedTask);
});
scheduler.Dispose();
// There are two cases to consider in the verification. One, the cancellation is detected by the scheduler. In that case
// the task will complete successfully (it does not cancel itself), but the inner async task will not run. And 2, the cancellation
// occurs after the scheduling starts. In that case the inner task will execute, but is crafted to throw and OperationCancelledException.
try
{
task1.Task.Wait();
Assert.False(taskRan);
}
catch (OperationCanceledException)
{
}
}
public async Task Dispose_SkipsPendingTasks()
{
using var scheduler = new TaskDelayScheduler(TimeSpan.FromMilliseconds(250), IProjectThreadingServiceFactory.Create(), CancellationToken.None);
bool taskRan = false;
var task = scheduler.ScheduleAsyncTask(ct =>
{
taskRan = true;
return Task.CompletedTask;
});
scheduler.Dispose();
await task;
Assert.False(taskRan);
}