public void BackgroundWorker_CancelAsync_ReportsCancelledWhenWorkerSupportsCancellationIsTrue()
{
UnitTestContext context = GetContext();
//int numTimesProgressCalled = 0;
BackgroundWorker target = new BackgroundWorker();
target.DoWork += (o, e) =>
{
// report progress changed 10 times
for (int i = 1; i < 11; i++)
{
Thread.Sleep(100);
if (target.CancellationPending)
{
e.Cancel = true;
return;
}
}
};
target.WorkerSupportsCancellation = true;
target.RunWorkerCompleted += (o, e) =>
{
// target does not support ReportProgress we shold get a System.InvalidOperationException from DoWork
context.Assert.IsNull(e.Error);
context.Assert.IsTrue(e.Cancelled);
context.Assert.Success();
};
target.RunWorkerAsync(null);
target.CancelAsync();
context.Complete();
}
public void BackgroundWorker_CancelAsync_ThrowsInvalidOperationExceptionWhenWorkerSupportsCancellationIsFalse()
{
using (UnitTestContext context = GetContext())
{
BackgroundWorker target = new BackgroundWorker();
target.DoWork += (o, e) =>
{
for (int i = 1; i < 11; i++)
{
Thread.Sleep(10);
}
};
target.WorkerSupportsCancellation = false;
target.RunWorkerAsync(null);
try
{
target.CancelAsync(); // this call throws exception
}
catch (InvalidOperationException ex)
{
context.Assert.Fail(ex);
}
}
}
