public void NoAlertWhenNoReachedThreshold()
{
var handler = new HandlerMock();
var alerter = new ThresholdAlerter();
alerter.Add(100, handler.AlertHandler);
alerter.Check(0);
alerter.Check(50);
alerter.Check(99);
Assert.Equal(0, handler.CallCount);
}
public void AlertOnceOnReachedThreshold()
{
var handler = new HandlerMock();
var alerter = new ThresholdAlerter();
alerter.Add(10, handler.AlertHandler);
// Alert
alerter.Check(10);
Assert.Equal(1, handler.CallCount);
// No alert
alerter.Check(11);
Assert.Equal(1, handler.CallCount);
}
public void NoThresholds()
{
var alerter = new ThresholdAlerter();
// No exceptions
alerter.Check(0);
}
public void BoundValues(int value, int threshold, int callCount)
{
var handler = new HandlerMock();
var alerter = new ThresholdAlerter();
alerter.Add(threshold, handler.AlertHandler);
alerter.Check(value);
Assert.Equal(callCount, handler.CallCount);
}
public void AlertWhenValueGoesDownAndUpThreshold()
{
var handler = new HandlerMock();
var alerter = new ThresholdAlerter();
alerter.Add(10, handler.AlertHandler);
alerter.Add(20, handler.AlertHandler);
// Alert
alerter.Check(20);
Assert.Equal(1, handler.CallCount);
Assert.Equal(20, handler.ReachedThreshold);
// No alert
alerter.Check(0);
Assert.Equal(1, handler.CallCount);
// Alert again
alerter.Check(17);
Assert.Equal(2, handler.CallCount);
Assert.Equal(10, handler.ReachedThreshold);
}
public void AlertOnceWhenPassedSeveralThresholds()
{
var handler = new HandlerMock();
var alerter = new ThresholdAlerter();
alerter.Add(10, handler.AlertHandler);
alerter.Add(20, handler.AlertHandler);
alerter.Check(30);
Assert.Equal(1, handler.CallCount);
Assert.Equal(20, handler.ReachedThreshold);
}
public void Smoke()
{
bool alerted = false;
var alerter = new ThresholdAlerter();
alerter.Add(10, x =>
{
alerted = true;
Assert.Equal(10, x);
});
alerter.Check(10);
Assert.True(alerted);
}
public void ManyChecks()
{
var alerter = new ThresholdAlerter();
var handler = new HandlerMock();
for (int i = 0; i < 1000; i += 10)
{
alerter.Add(i, handler.AlertHandler);
}
for (int i = 0; i < 10000; i++)
{
alerter.Check(i);
}
Assert.Equal(100, handler.CallCount);
Assert.Equal(990, handler.ReachedThreshold);
}
