public void AddOperation_Test()
{
AddOperation op = new AddOperation(new Integer(2), new Integer(4));
Assert.AreEqual(6, op.Value);
Assert.AreEqual("2 + 4", op.ToString());
}
public void Equation_Test2()
{
//Try to represent the equation 1 + 2 -3
IEquation node1 = new AddOperation(new Integer(1), new Integer(2));
Assert.AreEqual(3, node1.Value);
AddOperation equation = new AddOperation(node1, new Integer(3));
Assert.AreEqual(6, equation.Value);
Assert.AreEqual("1 + 2 + 3", equation.ToString());
}