public CookingActivityViewModel(
CookingActivity activity)
{
_model = activity;
_model.WhenAnyValue(x => x.RemainingTime)
.Subscribe(onNext: t => UpdateRemainingTime(t));
_model.WhenAnyValue(x => x.RemainingTime)
.Subscribe(onNext: t => IsOverdue = t < TimeSpan.Zero);
var isActive = _model.WhenAnyValue(x => x.IsActive);
var isNotActive = isActive.Select(x => !x);
var isTicking = _model.WhenAnyValue(x => x.IsActive);
var isNotTicking = isTicking.Select(x => !x);
_startCommand = ReactiveCommand.Create(() => StartCooking(), isNotTicking);
_pauseCommand = ReactiveCommand.Create(() => PauseCooking(), isTicking);
_stopCommand = ReactiveCommand.Create(() => FinishCooking());
_resetCommand = ReactiveCommand.Create(() => FinishCooking());
isTicking.CombineLatest(isActive, (a, b) => a && b)
.Subscribe(onNext: value => IsCountingDown = value);
ResetTimer();
}
private void AddActivity()
{
int r = new Random().Next(1, 10);
var activity = new CookingActivity
{
Name = string.Format("Cook the baboon for {0}s. ", r),
TotalTime = TimeSpan.FromSeconds(r)
};
_model.Activities.Add(activity);
}
public void ActivityOverdue()
{
var scheduler = new TestScheduler();
var activity = new CookingActivity(scheduler)
{
TotalTime = TimeSpan.FromSeconds(5)
};
var vm = new CookingActivityViewModel(activity);
vm.StartCommand.Execute(null);
scheduler.AdvanceBy(TimeSpan.FromSeconds(2).Ticks);
Assert.IsFalse(vm.IsOverdue);
StringAssert.DoesNotContain("-", vm.RemainingTime);
scheduler.AdvanceBy(TimeSpan.FromSeconds(5).Ticks);
Assert.IsTrue(vm.IsOverdue);
StringAssert.Contains("-", vm.RemainingTime);
}