public void Operator_ConstructorInputsMultiply_CreatesOperatorTreeBasedUponInputs()
{
var left = new Operand(OperandEnum.x);
var right = new Operand(OperandEnum.three);
var op = new Operator(OperatorEnum.multiply, left, right);
Assert.AreEqual(left.Type, op.Left.Type);
Assert.AreEqual(right.Type, op.Right.Type);
Assert.AreEqual("(x*3)", op.ToString());
Assert.AreEqual(15, op.Evalate(5));
Assert.AreEqual(false, op.DivideByZeroFlag);
Assert.AreEqual(2, op.Size());
Assert.AreEqual(true, op.GetRandomNode().Type == op.Type
|| op.GetRandomNode().Type == left.Type
|| op.GetRandomNode().Type == right.Type);
}
public void Operator_ConstructorInputsMinus_CreatesOperatorTreeBasedUponInputs()
{
var left = new Operand(OperandEnum.x);
var Right = new Operand(OperandEnum.three);
var op = new Operator(OperatorEnum.subtract, left, Right);
Assert.AreEqual(left.Type, op.Left.Type, "left type");
Assert.AreEqual(Right.Type, op.Right.Type, "rigth type");
Assert.AreEqual("(x-3)", op.ToString(), "to string");
Assert.AreEqual(2, op.Evalate(5), "evaluate");
Assert.AreEqual(false, op.DivideByZeroFlag, "divide by zero flage");
Assert.AreEqual(2, op.Size(), "height");
Assert.AreEqual(true, op.GetRandomNode().Type == op.Type
|| op.GetRandomNode().Type == left.Type
|| op.GetRandomNode().Type == Right.Type, "random node");
}
public void Operator_ConstructorInputsDivideWithZero_CreatesOperatorTreeBasedUponInputs()
{
var left = new Operand(OperandEnum.x);
var right = new Operand(OperandEnum.zero);
var op = new Operator(OperatorEnum.divide, left, right);
Assert.AreEqual(left.Type, op.Left.Type, "type of left");
Assert.AreEqual(right.Type, op.Right.Type, "type of right");
Assert.AreEqual("(x/0)", op.ToString(), "string");
Assert.AreEqual(double.MaxValue, op.Evalate(6), "evaluate");
Assert.AreEqual(true, op.DivideByZeroFlag, "divide by zero flage");
Assert.AreEqual(2, op.Size(), "height");
//Assert.AreEqual(4, op.GetRandomNode().Type);
Assert.AreEqual(true, (op.GetRandomNode().Type == op.Type
|| op.GetRandomNode().Type == left.Type
|| op.GetRandomNode().Type == right.Type), "random node");
}
/// <summary>
/// Gets a copy of the current node
/// </summary>
/// <returns></returns>
public override Node GetCopy()
{
var left = _left.GetCopy();
left.IsLeftChild = true;
var right = _right.GetCopy();
right.IsLeftChild = false;
var op = new Operator(this.OperatorType, left, right);
left.Parent = op;
right.Parent = op;
return op;
}
/// <summary>
/// Creates the right child based upon the given inputs
/// </summary>
/// <param name="currHeight"></param>
/// <param name="minReachedLeft"></param>
private void CreateRight(int currHeight, bool minReachedLeft = true)
{
if (currHeight + 1 < Settings.MaxTreeHeight)
{
if (currHeight < Settings.MinTreeHeight && !minReachedLeft)
{ _right = new Operator(currHeight + 1, minReachedLeft); }
else
{
if (_rGen.NextDouble() < Settings.OperandProb)
{ _right = new Operand(); }
else
{ _right = new Operator(currHeight + 1, minReachedLeft); }
}
}
else { _right = new Operand(); }
_right.Parent = this;
_right.IsLeftChild = false;
}
/// <summary>
/// Increases it to min height
/// </summary>
/// <param name="currHeight"></param>
/// <returns></returns>
public override bool Grow(int currHeight)
{
if (Left.Size() == Right.Size())
{
if (_rGen.NextDouble() < 0.5)
{
if (!Left.Grow(currHeight+1))
_left = new Operator(currHeight + 1, false);
}
else
{
if (!Right.Grow(currHeight + 1))
_right = new Operator(currHeight + 1, false);
}
}
else if (Left.Size() > Right.Size())
{
if (!Left.Grow(currHeight + 1))
_left = new Operator(currHeight + 1, false);
}
else
{
if (!Right.Grow(currHeight + 1))
_right = new Operator(currHeight + 1, false);
}
return true;
}
public void Operator_Constructor_CreatesRandomTree()
{
var op = new Operator();
Assert.AreEqual(true, op.HasChildren(), "children");
Assert.AreEqual(false, op.HasParent(), "parent");
Assert.AreEqual(true, op.Type <= 3, "type <");
Assert.AreEqual(true, op.Type >= 0, "type >");
Assert.AreEqual(true, op.Size() >= Settings.MinTreeHeight, "min height");
Assert.AreEqual(true, op.Size() <= Settings.MaxTreeHeight, "max height");
}