Test.cs

Public Class FishTank
{

  // properties of the FishTank

  // Create a list object to hold the wildlife in the tank
  public List<Fish> TankLife = new List<Fish>();
  
  // Total widlife Capacity for a healthy tank
  public int Gallons;
  
  // default constructor
  public FishTank() {}

  public FishTank(int waterCapacity)
  {
    Gallons = waterCapacity;
  }

  // Factory method used in unit tests
  public FishTank tankFactory(int waterCapacity)
  {
      FishTank thisTank = new FishTank(waterCapacity, tankCapacity);
      return thisTank;
  }

  // Method to add fish
  public void addFish(Fish thisFish)
  {
    // iterate over each fish going in the tank
      tankLife.add(fish);
  }

  // predicate function to test if the tank is overpopulated
  // general rule of thumb that i've been taught is 2 fish per gallon. NO MORE
  // it promotes less stress on filtration systems -- fish poop is yuck
  public bool isOverPopulated()
  {
    if (tankLife.count() > (Gallons / 2) )
    {
      return true;
    } 
    else
    {
      return false;
    }
  }

}

// Fish object
// TODO: write setters for later object manipulation -- but this simple demo wont receive that.
Public Class Fish
{
  // Name the Phylum, class, genum, or just "pete", any is ok
  public string FishName; // people forget who fish are - they are fish after all
                          // so make this property public so we can change it on the fly without a setter method.

  private bool isAlgeaEater;
  private bool isCannibal;)
  private bool Alive = true;

  // Default Constructor
  public Fish() {}

  // public constructor
  public Fish(string thisFishName, bool fishEatsAlgea, bool fishEatsOtherFish)
  {
    FishName = thisFishName;
    isAlgeaEater = fishEatsAlgea;
    isCannibal = fishEatsOtherFish;
  }

  // factory method used in unit testing
  public Fish FishFactory(string thisFishName, bool fishEatsAlgea, bool fishEatsOtherFish)
  {
    Fish thisFish = new Fish(thisFishName, fishEatsAlgea, fishEatsOtherFish);
    return thisFish;
  }

  public bool isFishDead()
  {
    return alive;
  }

  public bool canEatAlgea()
  {
    return isAlgeaEater;
  }

  public bool willEatOtherFish()
  {
    return isCannibal;
  }

  public void Swim()
  {
    // TODO: add swim logic to detect boundaries of tank and swim in circles.
  }

  public void Float()
  {
    //TODO: add float logic to bob at the top of the tank
  }

  public void KillFish()
  {
    Alive = false;
  }

}


public void main() 
{
  FishTank thisTank = new FishTank(30);
  thisTank.addFish(new Fish("bob", true, false));
  thisTank.addFish(new Fish("Angel Fish", false, false));
  thisTank.addFish(new Fish("Pete", false, false));
  
  foreach (fish in thisTank.TankLife)
  {
    if (!fish.isFishDead())
    {
      fish.Swim();
    } 
    else
    {
      fish.Float();
    }

    if (fish.isCannibal())
    {
      // randomly select another fish to eat
      int randomFish = math.rand(0, thisTank.TankLife.Count());
      thisTank.TankLife[randomFish].KillFish();
      thisTank.TankLife[randomFish].Float();
    }

  }

  

}