public InputOperationFactory()
{
_operationMap["add"] = new OperationSum();
_operationMap["sub"] = new OperationDifference();
_operationMap["mul"] = new OperationMultiply();
_operationMap["div"] = new OperationDivide();
_operationMap["pow"] = new OperationPower();
}
public void OperationMultiplyReturnCorrectResult()
{
OperationMultiply mult = new OperationMultiply();
Assert.AreEqual(18, mult.GetResult(2, 9));
}