public void CollectionIsVirtualized(int pageSize)
{
var items = new List <TestEntity>
{
new TestEntity(1),
new TestEntity(2)
};
DbContext.Set <TestEntity>().AddRange(items);
// ReSharper disable once CollectionNeverUpdated.Local
var collection = new TestPagedList(new TestRepoProvider(DbContext), pageSize);
collection.Pages.Should().BeEmpty();
var fecthedItems = new List <TestEntity>();
foreach (var item in items)
{
// fetch element
var element = collection[items.IndexOf(item)];
element.Should().Be(item);
fecthedItems.Add(element);
// number of pages depends on no of items fetched and the pageSize
var expectedPagesCount = Math.Max(fecthedItems.Count / pageSize, 1);
collection.Pages.Count.Should().Be(expectedPagesCount);
collection.Pages[expectedPagesCount - 1].Should().Contain(element);
collection.PageTouchTimes.Count.Should().Be(expectedPagesCount);
}
}
public void ResetsOnProviderCollectionChanged()
{
var provider = new TestRepoProvider(DbContext);
// ReSharper disable once CollectionNeverUpdated.Local
var collection = new TestPagedList(provider, 1);
bool wasChanged = false;
collection.CollectionChangedObservable().Subscribe(_ => wasChanged = true);
collection.WasResetPagesCalled.Should().BeFalse();
collection.WasLoadCountCalled.Should().BeFalse();
provider.SignalReset();
collection.WasResetPagesCalled.Should().BeTrue();
collection.WasLoadCountCalled.Should().BeTrue();
wasChanged.Should().BeTrue();
}
