public void IntAverage_ObservableSource_NoUpdatesWhenDetached()
{
var update = false;
var coll = new NotifyCollection <int>()
{
1, 2, 3
};
var test = Observable.Expression(() => coll.Average());
test.ValueChanged += (o, e) => update = true;
Assert.AreEqual(2, test.Value);
Assert.IsFalse(update);
test.Detach();
coll.Add(4);
Assert.IsFalse(update);
test.Attach();
Assert.IsTrue(update);
Assert.AreEqual(2.5, test.Value);
update = false;
coll.Add(5);
Assert.IsTrue(update);
}
public void IntAverage_ObservableSource_NoUpdatesWhenDetached()
{
var update = false;
var coll = new NotifyCollection<int>() { 1, 2, 3 };
var test = Observable.Expression(() => coll.Average());
test.ValueChanged += (o, e) => update = true;
Assert.AreEqual(2, test.Value);
Assert.IsFalse(update);
test.Detach();
coll.Add(4);
Assert.IsFalse(update);
test.Attach();
Assert.IsTrue(update);
Assert.AreEqual(2.5, test.Value);
update = false;
coll.Add(5);
Assert.IsTrue(update);
}
public void LambdaNullableIntAverage_ObservableSourceReset_Update()
{
var update = false;
var coll = new NotifyCollection <Dummy <int?> >()
{
1, 2, new Dummy <int?>(), 3
};
var test = Observable.Expression(() => coll.Average(d => d.Item));
test.ValueChanged += (o, e) => update = true;
coll.Clear();
Assert.IsTrue(update);
}
public void IntAverage_ObservableSourceReset_Update()
{
var update = false;
var coll = new NotifyCollection <int>()
{
1, 2, 3
};
var test = Observable.Expression(() => coll.Average());
test.ValueChanged += (o, e) => update = true;
coll.Clear();
Assert.IsTrue(update);
}
public void SelectWithAverage2()
{
var updates = 0;
var coll = new NotifyCollection <TestItem>();
var query = from item in coll
where item.Items < coll.Average(t => t.Items)
select item;
var testItem1 = new TestItem()
{
Items = 1, Team = "A"
};
var testItem2 = new TestItem()
{
Items = 2, Team = "A"
};
query.CollectionChanged += (o, e) =>
{
updates++;
Assert.AreEqual(NotifyCollectionChangedAction.Add, e.Action);
Assert.AreEqual(1, e.NewItems.Count);
Assert.AreSame(testItem1, e.NewItems[0]);
};
coll.Add(testItem2);
Assert.AreEqual(0, updates);
coll.Add(testItem1);
Assert.AreEqual(1, updates);
Assert.AreEqual(1, query.Count());
Assert.IsTrue(query.Contains(testItem1));
}
public void SelectWithAverage2()
{
var updates = 0;
var coll = new NotifyCollection<TestItem>();
var query = from item in coll
where item.Items < coll.Average(t => t.Items)
select item;
var testItem1 = new TestItem() { Items = 1, Team = "A" };
var testItem2 = new TestItem() { Items = 2, Team = "A" };
query.CollectionChanged += (o, e) =>
{
updates++;
Assert.AreEqual(NotifyCollectionChangedAction.Add, e.Action);
Assert.AreEqual(1, e.NewItems.Count);
Assert.AreSame(testItem1, e.NewItems[0]);
};
coll.Add(testItem2);
Assert.AreEqual(0, updates);
coll.Add(testItem1);
Assert.AreEqual(1, updates);
Assert.AreEqual(1, query.Count());
Assert.IsTrue(query.Contains(testItem1));
}
public void LambdaNullableIntAverage_ObservableSourceReset_Update()
{
var update = false;
var coll = new NotifyCollection<Dummy<int?>>() { 1, 2, new Dummy<int?>(), 3 };
var test = Observable.Expression(() => coll.Average(d => d.Item));
test.ValueChanged += (o, e) => update = true;
coll.Clear();
Assert.IsTrue(update);
}
public void IntAverage_ObservableSourceReset_Update()
{
var update = false;
var coll = new NotifyCollection<int>() { 1, 2, 3 };
var test = Observable.Expression(() => coll.Average());
test.ValueChanged += (o, e) => update = true;
coll.Clear();
Assert.IsTrue(update);
}