public void smoke_detector_IdleAtSafeLevels()
{
SmokeDetector.Reset();
int signal_on, signal_off;
// 60 seconds at level of 0.1 should be peaceful
for (int i = 0; i < 60; i++)
{
signal_off = 0; signal_on = 0;
SmokeDetector.smoke_detector(0.1, ref signal_on, ref signal_off);
Assert.AreEqual(0, signal_off, "Iteration #" + i);
Assert.AreEqual(0, signal_on, "Iteration #" + i);
}
}
public void smoke_detector_OnAfterFiveThenOffAfterFivePlusTwenty()
{
SmokeDetector.Reset();
int signal_on = 0, signal_off = 0;
// 4 seconds at level of 0.6 accumulates detection
for (int i = 0; i < 4; i++)
{
signal_off = 0; signal_on = 0;
SmokeDetector.smoke_detector(0.6, ref signal_on, ref signal_off);
Assert.AreEqual(0, signal_off, "Iteration #" + i);
Assert.AreEqual(0, signal_on, "Iteration #" + i);
}
// the 5th second at level 0.6 triggers alarm
signal_off = 0; signal_on = 0;
SmokeDetector.smoke_detector(0.6, ref signal_on, ref signal_off);
Assert.AreEqual(0, signal_off);
Assert.AreEqual(1, signal_on);
// alarm sounds while detection decays through 5 seconds at level 0.1
for (int i = 0; i < 5; i++)
{
signal_off = 0; signal_on = 0;
SmokeDetector.smoke_detector(0.1, ref signal_on, ref signal_off);
Assert.AreEqual(0, signal_off, "Iteration #" + i);
Assert.AreEqual(0, signal_on, "Iteration #" + i);
}
// alarm sounds for another 20 seconds
for (int i = 0; i < 20; i++)
{
signal_off = 0; signal_on = 0;
SmokeDetector.smoke_detector(0.1, ref signal_on, ref signal_off);
Assert.AreEqual(0, signal_off, "Iteration #" + i);
Assert.AreEqual(0, signal_on, "Iteration #" + i);
}
// 20 seconds without breaching level means it is safe to turn off alarm
signal_off = 0; signal_on = 0;
SmokeDetector.smoke_detector(0.1, ref signal_on, ref signal_off);
Assert.AreEqual(1, signal_off);
Assert.AreEqual(0, signal_on);
}