public void WhereSelectOrderByTransaction_RemoveCausingChange_Update() // Works without Transaction
{
ExecutionEngine.Current = new SequentialExecutionEngine();
var update = false;
var dummy1 = new ObservableDummy <int>(1);
var dummy2 = new Dummy <int>(3);
var dummy3 = new Dummy <int>(5);
var coll = new NotifyCollection <Dummy <int> >()
{
dummy1, dummy2, dummy3
};
var test = coll.Where(d => d.Item > 0).Select(d => new Dummy <int>(d.Item * 2)).OrderBy(d => d.Item);
test.CollectionChanged += (o, e) => update = true;
((IEnumerable <Dummy <int> >)test).Select(d => d.Item).AssertSequence(dummy1.Item * 2, dummy2.Item * 2, dummy3.Item * 2);
Assert.AreEqual(3, test.Sequences.Count());
Assert.IsFalse(update);
ExecutionEngine.Current.BeginTransaction();
dummy1.Item = 0;
Assert.IsFalse(update);
ExecutionEngine.Current.CommitTransaction();
// Calling Select directly on test leads to quadrupling of the entries in test
((IEnumerable <Dummy <int> >)test).Select(d => d.Item).AssertSequence(dummy2.Item * 2, dummy3.Item * 2);
Assert.AreEqual(2, test.Sequences.Count());
Assert.IsTrue(update);
}
public void WhereOrderByTransaction_ChangeRemove_Update() // Works without Transaction
{
ExecutionEngine.Current = new SequentialExecutionEngine();
var update = false;
var dummy1 = new ObservableDummy <int>(1);
var dummy2 = new Dummy <int>(3);
var dummy3 = new Dummy <int>(5);
var coll = new NotifyCollection <Dummy <int> >()
{
dummy1, dummy2, dummy3
};
var test = coll.Where(d => d.Item > 0).OrderBy(d => d.Item);
test.CollectionChanged += (o, e) => update = true;
test.AssertSequence(dummy1, dummy2, dummy3);
Assert.AreEqual(3, test.Sequences.Count());
Assert.IsFalse(update);
ExecutionEngine.Current.BeginTransaction();
dummy1.Item = 0;
Assert.IsFalse(update);
ExecutionEngine.Current.CommitTransaction();
test.AssertSequence(dummy2, dummy3);
Assert.AreEqual(2, test.Sequences.Count());
Assert.IsTrue(update);
}
public void WhereTransaction_ObservableItem_Updates()
{
var oldEngine = ExecutionEngine.Current;
try
{
ExecutionEngine.Current = new SequentialExecutionEngine();
var update = false;
var dummy1 = new ObservableDummy <bool>(true);
INotifyCollection <Dummy <bool> > coll = new NotifyCollection <Dummy <bool> >()
{
dummy1
};
var test = coll.Where(d => d.Item);
test.CollectionChanged += (o, e) =>
{
update = true;
Assert.AreEqual(dummy1, e.OldItems[0]);
};
Assert.IsTrue(Sys.Contains(test, dummy1));
Assert.IsFalse(update);
ExecutionEngine.Current.BeginTransaction();
dummy1.Item = false;
Assert.IsFalse(update);
ExecutionEngine.Current.CommitTransaction();
Assert.IsFalse(test.Any());
Assert.IsTrue(update);
}
finally
{
ExecutionEngine.Current = oldEngine;
}
}
public void Transformations_Relational_Where_Exception1()
{
var result = source.Where(null);
}
