public void EntityPredicate_Can_Be_Used_With_DerivedEntityQueryable()
{
using (var fruitContext = new FruitContext())
{
var badFruitSpecification = new BadFruitSpecification();
var satisfiedApples = badFruitSpecification.SatisfiedBy(fruitContext.Apples);
Assert.IsTrue(satisfiedApples.Any());
}
}
public void False_Satisfies_None()
{
var falseSpecification = Specification <int> .False();
using (var fruitContext = new FruitContext())
{
var integers = GetIntegers(fruitContext);
var satisfiedIntegers = falseSpecification.SatisfiedBy(integers);
Assert.IsTrue(!satisfiedIntegers.Any());
}
}
public void True_Satisfies_All()
{
var trueSpecification = Specification <int> .True();
using (var fruitContext = new FruitContext())
{
var integers = GetIntegers(fruitContext);
var satisfiedIntegers = trueSpecification.SatisfiedBy(integers);
Assert.IsTrue(satisfiedIntegers.Any());
CollectionAssert.AreEquivalent(integers.ToList(), satisfiedIntegers.ToList());
}
}
public void AndAlso_Satisfies_Both()
{
var greaterThanSpecification = new GreaterThanSpecification(-2);
var lessThanSpecification = new LessThanSpecification(2);
var compositeSpecification = greaterThanSpecification.AndAlso(lessThanSpecification);
using (var fruitContext = new FruitContext())
{
var integers = GetIntegers(fruitContext);
var satisfiedIntegers = compositeSpecification.SatisfiedBy(integers);
Assert.IsTrue(satisfiedIntegers.Any());
Assert.IsTrue(satisfiedIntegers.All(i => i > -2 && i < 2));
}
}
public void OrElse_Satisfies_Either()
{
var greaterThanSpecification = new GreaterThanSpecification(2);
var lessThanSpecification = new LessThanSpecification(-2);
var compositeSpecification = greaterThanSpecification.OrElse(lessThanSpecification);
using (var fruitContext = new FruitContext())
{
var integers = GetIntegers(fruitContext);
var satisfiedIntegers = compositeSpecification.SatisfiedBy(integers);
Assert.IsTrue(satisfiedIntegers.Any());
Assert.IsTrue(satisfiedIntegers.All(i => i > 2 || i < -2));
}
}
public void EntitySpecification_Can_Be_Used_With_DerivedEntitySpecification()
{
using (var fruitContext = new FruitContext())
{
var badFruitSpecification = new BadFruitSpecification();
var appleNameSpecification = new AppleNameSpecification("R");
var satisfiedApples = badFruitSpecification
.AndAlso(appleNameSpecification)
.SatisfiedBy(fruitContext.Apples);
Assert.IsTrue(satisfiedApples.Any());
Assert.IsTrue(satisfiedApples.All(a => a.Bad && a.Name.Contains("R")));
}
}
public void EntityPredicate_Can_Be_Used_With_IEnumerable()
{
using (var fruitContext = new FruitContext())
{
var badFruitSpecification = new BadFruitSpecification();
var appleNameSpecification = new AppleNameSpecification("R");
var satisfiedApples = badFruitSpecification
.AndAlso(appleNameSpecification)
// ToList => Pass an IEnumerable that's not an IQueryable.
.SatisfiedBy(fruitContext.Apples.ToList());
var satisfiedApplesList = satisfiedApples.ToList();
Assert.IsTrue(satisfiedApplesList.Any());
Assert.IsTrue(satisfiedApplesList.All(a => a.Bad && a.Name.Contains("R")));
}
}
private static IQueryable <int> GetIntegers(FruitContext fruitContext)
{
return(fruitContext.Fruits.Select(f => f.FruitId - 13));
}