public void ShouldRaiseLowFuel_WithoutNSub()
{
var fuelManagement = new FuelManagement();
var eventWasRaised = false;
fuelManagement.LowFuelDetected += (o, e) => eventWasRaised = true;
fuelManagement.DoSomething();
Assert.That(eventWasRaised);
}
public void ShouldRaiseLowFuel()
{
var fuelManagement = new FuelManagement();
var handler = Substitute.For <EventHandler <LowFuelWarningEventArgs> >();
fuelManagement.LowFuelDetected += handler;
fuelManagement.DoSomething();
handler
.Received()
.Invoke(fuelManagement, Arg.Is <LowFuelWarningEventArgs>(x => x.PercentLeft < 20));
}