private static string PrintNodes(EquationStruct node, string indentation, bool isRightOperand)
{
string eq = indentation + "+- {" + node.GetOperator() + "}";
if (node.GetLeftOperand() == null && node.GetRightOperand() == null)
{
eq += " " + node.GetVariableName();
}
if (isRightOperand && node.GetLeftOperand() == null && node.GetRightOperand() == null)
{
indentation += " ";
}
else
{
indentation += "| ";
}
eq += System.Environment.NewLine;
if (node.GetLeftOperand() != null)
{
eq += PrintNodes(node.GetLeftOperand(), indentation, false);
}
if (node.GetRightOperand() != null)
{
eq += PrintNodes(node.GetRightOperand(), indentation, true);
}
return(eq);
}
public void TestEqSetLeftOperand()
{
// unittest-equationdatastructuresetleftop
EquationStruct eq = new EquationStruct("+", "x", null, null);
eq.SetLeftOperand(new EquationStruct("VAR", "y", null, null));
Assert.AreEqual("y", eq.GetLeftOperand().GetVariableName());
}
/* HELPER FUNCTIONS */
private static string PrintEquation(EquationStruct node)
{
string equation = "";
if (node.GetLeftOperand() == null)
{
equation = node.GetOperator() + ": " + node.GetVariableName();
}
else if (node.GetRightOperand() == null)
{
equation = node.GetOperator() + "(" + PrintEquation(node.GetLeftOperand()) + ")";
}
else
{
equation = node.GetOperator() + "(" + PrintEquation(node.GetLeftOperand()) + ", " + PrintEquation(node.GetRightOperand()) + ")";
}
return(equation);
}
public void TestEquationStructConstructor()
{
// unittest-equationdatastructureconstruct
EquationStruct eq = new EquationStruct("+", "x", new EquationStruct("VAR", "y", null, null), new EquationStruct("VAR", "z", null, null));
Assert.AreEqual("+", eq.GetOperator());
Assert.AreEqual("x", eq.GetVariableName());
Assert.AreEqual("y", eq.GetLeftOperand().GetVariableName());
Assert.AreEqual("z", eq.GetRightOperand().GetVariableName());
}
public void TestEquationStructConstructorWithNulls()
{
// unittest-equationdatastructureconstructnulls
EquationStruct eq = new EquationStruct("+", "x", null, null);
Assert.AreEqual("+", eq.GetOperator());
Assert.AreEqual("x", eq.GetVariableName());
Assert.AreEqual(null, eq.GetLeftOperand());
Assert.AreEqual(null, eq.GetRightOperand());
}