public void TestAttach()
{
LessOrEqualFilter <int> filter = GetLessOrEqualFilter <int>();
var source = enumSource.ToList();
var filterPresenter = FilterPresenter.Get(source);
Assert.IsNotNull(filterPresenter);
Assert.IsFalse(filter.IsActive);
filter.Attach(filterPresenter);
var view = filterPresenter.CollectionView;
var filtered = GetCollection(view);
Assert.AreEqual(source.Count, filtered.Count);
filter.CompareTo = (int)StateEnum.State3;
Assert.IsTrue(filter.IsActive);
filtered = GetCollection(view);
Assert.AreEqual(4, filtered.Count);
Assert.AreEqual((int)StateEnum.State0, filtered[0]);
Assert.AreEqual((int)StateEnum.State1, filtered[1]);
Assert.AreEqual((int)StateEnum.State2, filtered[2]);
Assert.AreEqual((int)StateEnum.State3, filtered[3]);
}
