public void NoChangesAllowedDuringPreview()
{
// On preview, try adding an arbitrary item
var d = _source.Preview().Subscribe(_ =>
{
Assert.Throws <InvalidOperationException>(() => _source.Add(1));
});
// Trigger a change
_source.Add(1);
// Cleanup
d.Dispose();
}
public void ChangesAreNotYetAppliedDuringPreview()
{
_source.Clear();
// On preview, make sure the list is empty
var d = _source.Preview().Subscribe(
_ =>
{
Assert.True(_source.Count == 0);
Assert.True(_source.Items.Count() == 0);
});
// Trigger a change
_source.Add(1);
// Cleanup
d.Dispose();
}
public IObservable <IChangeSet <T> > Preview(Func <T, bool> predicate = null) => _sourceList.Preview(predicate);
