public void AddReallyLargeNumbers()
{
//Arrange
string number1 = "123456789101112131415161718192021222324252627282930";
string number2 = "302928272625242322212019181716151413121110987654321";
string knownAnswer = "426385061726354453627180899908172635445363614937251";
//Act
OperatorService add = new OperatorService(number1, number2);
string answer = add.Calculate();
//Assert
Assert.AreEqual(knownAnswer, answer);
}
public void AddNegativeNumbers()
{
//Arrange
int number1 = -154;
int number2 = -89;
string knownAnswer = (number1 + number2).ToString();
//Act
OperatorService add = new OperatorService(number1.ToString(), number2.ToString());
string answer = add.Calculate();
//Assert
Assert.AreEqual(knownAnswer, answer);
}