public void ParseEnsureGetSecondWorksWithSpaces()
 {
     //Act
     string input = "7 + 7";
     //Arrange
     Parse parse = new Parse();
     //Assert
     Assert.AreEqual("7", parse.GetSecond(input));
 }
 public void ParseEnsureGetSecondWorksWithNegativeIntegersNoSpaces()
 {
     //Act
     string input = "7+ -3";
     //Arrange
     Parse parse = new Parse();
     //Assert
     Assert.AreEqual("-3", parse.GetSecond(input));
 }