public void ShieldPowerupCanBeInstnatiatedWithoutDuration()
{
var shield = Substitute.For <IShield>();
ShieldPowerup powerup = new ShieldPowerup(shield, null);
Assert.AreEqual(null, powerup.Duration());
}
public void ShieldPowerupCanBeInstantiated()
{
var shield = Substitute.For <IShield>();
ShieldPowerup powerup = new ShieldPowerup(shield);
Assert.AreEqual(10f, powerup.Duration());
}