public void Concat_ObservableSources_NoUpdateWhenDetached()
{
var update = false;
var coll1 = new NotifyCollection<int>() { 1, 2, 3 };
var coll2 = new NotifyCollection<int>() { 4, 5, 6 };
var test = coll1.Concat(coll2);
test.CollectionChanged += (o, e) => update = true;
test.AssertSequence(1, 2, 3, 4, 5, 6);
Assert.IsFalse(update);
test.Detach();
update = false;
coll1.Add(4);
Assert.IsFalse(update);
coll2.Add(7);
Assert.IsFalse(update);
test.Attach();
Assert.IsTrue(update);
test.AssertSequence(1, 2, 3, 4, 4, 5, 6, 7);
update = false;
coll1.Add(5);
Assert.IsTrue(update);
}
public void Concat_ObservableSources_NoUpdateWhenDetached()
{
var update = false;
var coll1 = new NotifyCollection <int>()
{
1, 2, 3
};
var coll2 = new NotifyCollection <int>()
{
4, 5, 6
};
var test = coll1.Concat(coll2);
test.CollectionChanged += (o, e) => update = true;
test.AssertSequence(1, 2, 3, 4, 5, 6);
Assert.IsFalse(update);
test.Detach();
update = false;
coll1.Add(4);
Assert.IsFalse(update);
coll2.Add(7);
Assert.IsFalse(update);
test.Attach();
Assert.IsTrue(update);
test.AssertSequence(1, 2, 3, 4, 4, 5, 6, 7);
update = false;
coll1.Add(5);
Assert.IsTrue(update);
}