/// <summary>
/// Adds a new observer to be notified when a specific temperature drop or rise threshold has been reached
/// </summary>
/// <param name="name">The name of this notification and threshold</param>
/// <param name="thresholdTemperature">The temperature reading to be notified at</param>
/// <param name="sensitivity">The sensitivity of when to notify</param>
/// <param name="observer">The client to be notified that implements <see cref="IObserver{T}"/></param>
/// <returns>An <see cref="IDisposable" />to enable cancellation of notificaiton for that observer</returns>
public IDisposable NotifyOnTemperatureChange(
TemperatureChangeType changeType,
string name,
double thresholdTemperature,
double sensitivity,
Action <ThresholdInfo> callBack
)
{
if (changeType == TemperatureChangeType.Drop)
{
return(_temperatureDropped.Add(
new ThresholdObservation(
callBack,
new ThresholdInfo(name, thresholdTemperature, _scale, sensitivity, _reading))));
}
if (changeType == TemperatureChangeType.Rise)
{
return(_temperatureRose.Add(
new ThresholdObservation(
callBack,
new ThresholdInfo(name, thresholdTemperature, _scale, sensitivity, _reading))));
}
throw new ArgumentOutOfRangeException("Temperature change type was not recognized.");
}
public void NotifyOnTemperatureChange_ShouldNotify(double triggerReading, double threshold, double sensitivityVariance, TemperatureChangeType changeType, double result)
{
// Act
var actualReading = default(ThresholdInfo);
_thermometer.NotifyOnTemperatureChange(changeType, "Boiling", threshold, sensitivityVariance, (t) => { actualReading = t; });
_thermometer.SetReading(triggerReading);
// Assert
// Should be null and should not have been called
Assert.AreEqual(triggerReading, actualReading.CurrentReading);
}
public void NotifyOnTemperatureChange_ShouldNotNotify(double triggerReading, double threshold, double sensitivityVariance, TemperatureChangeType changeType, ThresholdInfo result)
{
// Arrange
// Set the reading before we request a notfication so it's not the first time
_thermometer.SetReading(triggerReading);
// Act
var actualReading = default(ThresholdInfo);
_thermometer.NotifyOnTemperatureChange(changeType, "Boiling", threshold, sensitivityVariance, (t) => { actualReading = t; });
_thermometer.SetReading(triggerReading);
// Assert
// Should be null and should not have been called
Assert.AreEqual(result, actualReading);
}
