public void TestCalculateAverageSpeed()
{
// arrange
int delayTime = 50;
int receivedBytesPerDelay = 250;
int testElapsedTime = 4000; // 4s
int repeatCount = testElapsedTime / delayTime;
Bandwidth calculator = new Bandwidth();
var speedHistory = new List <double>();
// act
for (int i = 0; i < repeatCount; i++)
{
Thread.Sleep(delayTime);
calculator.CalculateSpeed(receivedBytesPerDelay);
speedHistory.Add(calculator.Speed);
}
// assert
var expectedAverageSpeed = Math.Ceiling(speedHistory.Average());
var actualAverageSpeed = Math.Ceiling(calculator.AverageSpeed);
var theoryAverageSpeed = 1000 / delayTime * receivedBytesPerDelay;
Assert.IsTrue(expectedAverageSpeed < actualAverageSpeed, $"Actual Average Speed is: {actualAverageSpeed} , Expected Average Speed is: {expectedAverageSpeed}");
Assert.IsTrue(actualAverageSpeed < theoryAverageSpeed, $"Actual Average Speed is: {actualAverageSpeed} , Theory Average Speed is: {theoryAverageSpeed}");
}