public void WhiskeyAndCold()
{
// Arrange
Specification <Drink> whiskeySpec = new WhiskeySpec();
Specification <Drink> coldSpec = new ColdDrinkSpec();
// Act
var coldWhiskeySpec = whiskeySpec.And(coldSpec);
// Assert
coldWhiskeySpec.IsSatisfiedBy(Drink.ColdWhiskey()).Should().BeTrue();
coldWhiskeySpec.IsSatisfiedBy(Drink.AppleJuice()).Should().BeFalse();
}
public void WhiskeyAndCold_using_operator()
{
// Arrange
Drink coldWhiskey = Drink.ColdWhiskey();
Drink appleJuice = Drink.AppleJuice();
Specification <Drink> whiskeySpec = new WhiskeySpec();
Specification <Drink> coldSpec = new ColdDrinkSpec();
// Act
var coldWhiskeySpec = whiskeySpec & coldSpec;
// Assert
coldWhiskeySpec.IsSatisfiedBy(coldWhiskey).Should().BeTrue();
coldWhiskeySpec.IsSatisfiedBy(appleJuice).Should().BeFalse();
}
