public void MinusOperation_Test()
{
MinusOperation op = new MinusOperation(new Integer(2), new Integer(4));
Assert.AreEqual(-2, op.Value);
Assert.AreEqual("2 - 4", op.ToString());
}
public void Equation_Test1()
{
//Try to represent the equation ((5+1) x 3) - 4
IEquation node1 = new AddOperation(new Integer(5), new Integer(1));
Assert.AreEqual(6, node1.Value);
MultiplyOperation node2 = new MultiplyOperation(node1, new Integer(3));
Assert.AreEqual(18, node2.Value);
MinusOperation equation = new MinusOperation(node2, new Integer(4));
Assert.AreEqual(14, equation.Value);
Assert.AreEqual("((5 + 1) x 3) - 4", equation.ToString());
}