public void DefendAgainstAttack_SuperMode_ShouldDecrementHealthWithHalfAttackStrength()
{
//Arrange
int health = Random.Next(50, 100);
IHero hero = new HeroBuilder().WithSuperModeLikeliness(1).WithHealth(health).Build();
int attackStrength = Random.Next(1, hero.Health);
//Act
hero.DefendAgainstAttack(attackStrength);
//Assert
Assert.That(hero.Health, Is.EqualTo(health - attackStrength / 2));
}
private static void AssertSuperModeLikelinessForDefend(float superModeLikeliness)
{
int numberOfDefends = 200;
int numberOfNormalDefends = 0;
int numberOfSuperDefends = 0;
for (int i = 0; i < numberOfDefends; i++)
{
int startHealth = Random.Next(60, 101);
int attackStrength = Random.Next(2, 20);
if (attackStrength % 2 != 0)
{
attackStrength += 1;
}
IHero hero = new HeroBuilder().WithSuperModeLikeliness(superModeLikeliness).WithHealth(startHealth).Build();
hero.DefendAgainstAttack(attackStrength);
int expectedHealthNormal = startHealth - attackStrength;
int expectedHealthSuperMode = startHealth - attackStrength / 2;
Assert.That(hero.Health, Is.EqualTo(expectedHealthNormal).Or.EqualTo(expectedHealthSuperMode),
$"After defending an attack of strength {attackStrength} with an initial health of {startHealth}, " +
$"the health of the hero should be {expectedHealthNormal} or {expectedHealthSuperMode}.");
if (hero.Health == expectedHealthNormal)
{
numberOfNormalDefends++;
}
else
{
numberOfSuperDefends++;
}
}
string staticRandomTip =
"Tip: make sure all 'Hero' instances use the same 'Random' instance by declaring a static field like this: 'private static Random Random = new Random();'";
Assert.That(numberOfNormalDefends, Is.GreaterThan(0),
$"Out of {numberOfDefends} defends, no normal defend happened. That is not random enough. {staticRandomTip}");
Assert.That(numberOfSuperDefends, Is.GreaterThan(0),
$"Out of {numberOfDefends} defends, no supermode defend happened. That is not random enough. {staticRandomTip}");
double actualSuperMode = numberOfSuperDefends / (double)numberOfDefends;
Assert.That(actualSuperMode, Is.EqualTo(superModeLikeliness).Within(0.15),
$"After {numberOfDefends} defends the supermode likeliness seems to be around {Convert.ToInt32(actualSuperMode * 100)}%. " +
$"It should be around {Convert.ToInt32(superModeLikeliness * 100)}%. {staticRandomTip}");
}
