public void Test_Cheese_Validate_Cheese_Returns_True()
{
_cheese.Price = 10;
_cheese.BestBeforeDate = DateTime.Parse("2016-03-19");
_cheese.DaysToSell = 5;
_cheese.Name = "Good Cheese";
_cheese.Type = CheeseTypes.Aged;
var cheeseValidator = Substitute.For <ICheeseValidator>();
cheeseValidator.Validate(_cheese)
.Returns(new Tuple <bool, ValidationErrorType>(true, ValidationErrorType.None));
var validationResult = _cheese.Validate(cheeseValidator);
Assert.IsTrue(validationResult.Item1);
Assert.AreEqual(ValidationErrorType.None, (ValidationErrorType)validationResult.Item2);
}
