public void SetUp()
{
_xVariable = new Variable("x");
_yVariable = new Variable("y");
// 2*x + 7*(-y + x)
_formulaRoot =
new TreeNode<Operator>(OperatorsLibrary.Sum,
new TreeNode<Operator>(OperatorsLibrary.Mul,
new TreeNode<Operator>(new Constant(2)),
new TreeNode<Operator>(_xVariable)),
new TreeNode<Operator>(OperatorsLibrary.Mul,
new TreeNode<Operator>(new Constant(7)),
new TreeNode<Operator>(OperatorsLibrary.Sum,
new TreeNode<Operator>(OperatorsLibrary.Minus,
new TreeNode<Operator>(_yVariable)),
new TreeNode<Operator>(_xVariable))));
}
private static Operator OperatorFromString(string str, ICollection<Variable> availableVariables)
{
Operator knownOperator = GetKnownOperator(str);
if (knownOperator != null)
return knownOperator;
double constant;
if (double.TryParse(str, NumberStyles.Number, CultureInfo.InvariantCulture, out constant))
{
return new Constant(constant);
}
Variable availableVariable = availableVariables.FirstOrDefault(op => op.Name == str);
if (availableVariable == null)
{
availableVariable = new Variable(str);
availableVariables.Add(availableVariable);
}
return availableVariable;
}
public void TestVariable(double a, double expected)
{
Variable variable = new Variable("x") { Value = a };
double result = variable.Value;
Assert.AreEqual(expected, result);
}
public void TestName(string name)
{
Variable v = new Variable(name);
Assert.AreEqual(name, v.Name);
}