// ReSharper disable once UnusedMember.Local
private static IClrCollectionAccessor CreateGeneric <TEntity, TCollection, TElement>(PropertyInfo property)
where TEntity : class
where TCollection : class, ICollection <TElement>
{
var getterDelegate = (Func <TEntity, TCollection>)property.GetMethod.CreateDelegate(typeof(Func <TEntity, TCollection>));
Action <TEntity, TCollection> setterDelegate = null;
Func <TEntity, Action <TEntity, TCollection>, TCollection> createAndSetDelegate = null;
Func <TCollection> createDelegate = null;
var setter = property.SetMethod;
if (setter != null)
{
setterDelegate = (Action <TEntity, TCollection>)setter.CreateDelegate(typeof(Action <TEntity, TCollection>));
var concreteType = new CollectionTypeFactory().TryFindTypeToInstantiate(typeof(TCollection));
if (concreteType != null)
{
createAndSetDelegate = (Func <TEntity, Action <TEntity, TCollection>, TCollection>)_createAndSet
.MakeGenericMethod(typeof(TEntity), typeof(TCollection), concreteType)
.CreateDelegate(typeof(Func <TEntity, Action <TEntity, TCollection>, TCollection>));
createDelegate = (Func <TCollection>)_create
.MakeGenericMethod(typeof(TCollection), concreteType)
.CreateDelegate(typeof(Func <TCollection>));
}
}
return(new ClrICollectionAccessor <TEntity, TCollection, TElement>(
property.Name, getterDelegate, setterDelegate, createAndSetDelegate, createDelegate));
}
public void Returns_HashSet_if_assignable()
{
var factory = new CollectionTypeFactory();
Assert.Same(typeof(HashSet <Random>), factory.TryFindTypeToInstantiate(typeof(ICollection <Random>)));
Assert.Same(typeof(HashSet <Random>), factory.TryFindTypeToInstantiate(typeof(ISet <Random>)));
}
public void Returns_given_type_if_public_parameterless_constructor_available()
{
var factory = new CollectionTypeFactory();
Assert.Same(typeof(CustomHashSet), factory.TryFindTypeToInstantiate(typeof(CustomHashSet)));
Assert.Same(typeof(CustomList), factory.TryFindTypeToInstantiate(typeof(CustomList)));
Assert.Same(typeof(HashSet <Random>), factory.TryFindTypeToInstantiate(typeof(HashSet <Random>)));
Assert.Same(typeof(List <Random>), factory.TryFindTypeToInstantiate(typeof(List <Random>)));
Assert.Same(typeof(ObservableCollection <Random>), factory.TryFindTypeToInstantiate(typeof(ObservableCollection <Random>)));
}
public void Returns_null_when_no_usable_concrete_type_found()
{
var factory = new CollectionTypeFactory();
Assert.Null(factory.TryFindTypeToInstantiate(typeof(PrivateConstructor)));
Assert.Null(factory.TryFindTypeToInstantiate(typeof(InternalConstructor)));
Assert.Null(factory.TryFindTypeToInstantiate(typeof(ProtectedConstructor)));
Assert.Null(factory.TryFindTypeToInstantiate(typeof(NoParameterlessConstructor)));
Assert.Null(factory.TryFindTypeToInstantiate(typeof(Abstract)));
Assert.Null(factory.TryFindTypeToInstantiate(typeof(object)));
Assert.Null(factory.TryFindTypeToInstantiate(typeof(Random)));
Assert.Null(factory.TryFindTypeToInstantiate(typeof(IEnumerable <Random>)));
}
