public void Defer_NoFunc_DoesNotAddToTaskList()
{
Deferment deferment = new Deferment();
deferment.Defer((Func <Task>)null, 5000, CancellationToken.None);
deferment.Tasks.Should().BeEmpty();
}
public void Defer_AddsToTaskList()
{
Deferment deferment = new Deferment();
deferment.Defer(() => { }, 5000, CancellationToken.None);
deferment.Tasks.Should().NotBeEmpty();
}
public async Task Defer_RunsFunc()
{
bool invokedFunc = false;
Deferment deferment = new Deferment();
deferment.Defer(async() => { await Task.Delay(0); invokedFunc = true; }, 0);
await Task.WhenAll(deferment.Tasks.ToArray());
invokedFunc.Should().BeTrue();
}
public async Task Defer_RunsAction()
{
bool invokedAction = false;
Deferment deferment = new Deferment();
deferment.Defer(() => { invokedAction = true; }, 0, CancellationToken.None);
await Task.WhenAll(deferment.Tasks.ToArray());
invokedAction.Should().BeTrue();
}
public async Task Defer_RemovesFromTasklistWhenComplete()
{
Deferment deferment = new Deferment();
deferment.Defer(() => { }, 10, CancellationToken.None);
deferment.Tasks.Should().NotBeEmpty();
await Task.WhenAll(deferment.Tasks.ToArray());
deferment.Tasks.Should().BeEmpty();
}
public async Task Defers_WaitsBeforeInvokingAction()
{
int delay = 10;
Stopwatch sw = Stopwatch.StartNew();
Deferment deferment = new Deferment();
deferment.Defer(() => { sw.Stop(); }, delay, CancellationToken.None);
await Task.WhenAll(deferment.Tasks.ToArray());
sw.ElapsedMilliseconds.Should().BeGreaterOrEqualTo(delay);
}
public async Task Defer_CancellationDuringDelay_DoesNotInvokeAction()
{
bool invokedAction = false;
Deferment deferment = new Deferment();
CancellationTokenSource cts = new CancellationTokenSource(5);
deferment.Defer(() => { invokedAction = true; }, 10, cts.Token);
await Task.WhenAll(deferment.Tasks.ToArray());
invokedAction.Should().BeFalse();
}
public void Defer_Cancellation_DoesNotThrow()
{
Deferment deferment = new Deferment();
CancellationTokenSource cts = new CancellationTokenSource(1);
try
{
deferment.Defer(() => { }, 10, cts.Token);
}
catch (Exception ex)
{
Assert.Fail($"{ex.GetType()} should not have been thrown");
}
}