public void Now_ShouldReturnADateTimeWithLocalKind()
{
var service = new DefaultTimeService();
var now = service.Now;
Assert.That(now.Kind, Is.EqualTo(DateTimeKind.Local));
}
public void UtcNow_ShouldReturnADateTimeWithUtcKind()
{
var service = new DefaultTimeService();
var now = service.UtcNow;
Assert.That(now.Kind, Is.EqualTo(DateTimeKind.Utc));
}
public void Now_ShouldReflectTheCurrentTime()
{
var service = new DefaultTimeService();
var before = DateTime.Now;
var now = service.Now;
var after = DateTime.Now;
Assert.That(now, Is.GreaterThanOrEqualTo(before));
Assert.That(now, Is.LessThanOrEqualTo(after));
}
public void Delay_ShouldReturnATaskThatEffectsTheRequestedDelay(Func <ITimeService, Task> createTask)
{
var service = new DefaultTimeService();
var start = DateTime.UtcNow;
var task = createTask(service);
var end = DateTime.UtcNow;
task.Wait();
var now = DateTime.UtcNow;
Assert.That(now, Is.GreaterThanOrEqualTo(start + DelayTimeSpan - Leeway));
Assert.That(now, Is.LessThanOrEqualTo(end + DelayTimeSpan + Leeway));
}
public void Delay_WhenCreatedWithACancellationToken_ShouldBeCancellable(
Func <ITimeService, CancellationToken, Task> createTask)
{
var service = new DefaultTimeService();
var tokenSource = new CancellationTokenSource();
Task.Delay(CancelTimeSpan).ContinueWith(_ => tokenSource.Cancel());
var start = DateTime.UtcNow;
var task = createTask(service, tokenSource.Token);
var end = DateTime.UtcNow;
var aggregateException = Assert.Throws <AggregateException>(task.Wait);
var now = DateTime.UtcNow;
Assert.That(aggregateException.InnerExceptions.First(), Is.InstanceOf <TaskCanceledException>());
Assert.That(now, Is.GreaterThanOrEqualTo(start + CancelTimeSpan - Leeway));
Assert.That(now, Is.LessThanOrEqualTo(end + CancelTimeSpan + Leeway));
}