public void CalculateOperation_OperatorTextIsNotCorrect_ReturnsEmptyString()
{
var addition = new AdditionOperator();
var result = addition.CalculateOperation(1, 2, "GUM");
Assert.AreEqual(string.Empty, result);
}
public void CalculateOperation_OperatorTextIsCorrect_ReturnStringShowingOperation()
{
var addition = new AdditionOperator();
var result = addition.CalculateOperation(1, 2, "SUM");
Assert.AreEqual(string.Format("{0} + {1} = {2}", 1, 2, 1 + 2), result);
}