public string Sum_Returns_StringsSum(string num1, string num2) { return(_stringSum.Sum(num1, num2)); }
public void Sum_OneNotNaturalNumber_ShouldReturnSecondNumber() { Assert.AreEqual("1", StringSum.Sum("-1", "1")); }
public void Sum_TwoEmptyStrings_ShouldReturnZero() { Assert.AreEqual("0", StringSum.Sum("", "")); }
public void Sum_TwoNaturalNumbers_ShouldReturnTheirSum() { Assert.AreEqual("2", StringSum.Sum("1", "1")); }