public void TestRemoveItems()
{
var values = Enumerable.Range(0, 20).ToList();
var source = new ObservableCollection <int>(values);
var rrool = new ReversedReadOnlyObservableList <int>(source.ListAsObservable());
var copy = rrool.ListSelect(x => x);
// Remove pair values
for (int i = source.Count - 1; i >= 0; i--)
{
if (source[i] % 2 == 0)
{
source.RemoveAt(i);
}
}
Assert.AreEqual(10, rrool.Count);
Assert.IsTrue(rrool.SequenceEqual(source.AsEnumerable().Reverse()));
Assert.IsTrue(copy.SequenceEqual(source.AsEnumerable().Reverse()));
// Remove multiple of 3
for (int i = source.Count - 1; i >= 0; i--)
{
if (source[i] % 3 == 0)
{
source.RemoveAt(i);
}
}
Assert.AreEqual(7, rrool.Count);
Assert.IsTrue(rrool.SequenceEqual(source.AsEnumerable().Reverse()));
Assert.IsTrue(copy.SequenceEqual(source.AsEnumerable().Reverse()));
}
public void TestClearItems()
{
var values = Enumerable.Range(0, 20).ToList();
var source = new ObservableCollection <int>(values);
var rrool = new ReversedReadOnlyObservableList <int>(source.ListAsObservable());
var copy = rrool.ListSelect(x => x);
source.Clear();
Assert.AreEqual(0, rrool.Count);
Assert.AreEqual(0, copy.Count);
}
public void TestSetItems()
{
var values = Enumerable.Range(0, 20).ToList();
var source = new ObservableCollection <int>(values);
var rrool = new ReversedReadOnlyObservableList <int>(source.ListAsObservable());
var copy = rrool.ListSelect(x => x);
for (int i = 0; i < source.Count; i++)
{
source[i] *= 2;
}
Assert.IsTrue(rrool.SequenceEqual(values.Select(i => 2 * i).Reverse()));
Assert.IsTrue(copy.SequenceEqual(values.Select(i => 2 * i).Reverse()));
}
public void TestMoveItems()
{
var values = Enumerable.Range(0, 20).ToList();
var source = new ObservableCollection <int>(values);
var rrool = new ReversedReadOnlyObservableList <int>(source.ListAsObservable());
var copy = rrool.ListSelect(x => x);
var m = source.Count / 2;
for (int i = m + 1; i < source.Count; i++)
{
source.Move(i, m);
}
for (int i = m - 1; i >= 0; i--)
{
source.Move(i, source.Count - 1);
}
Assert.AreEqual(20, rrool.Count);
values.Reverse();
Assert.IsTrue(rrool.SequenceEqual(values.AsReadOnly().Reverse()));
Assert.IsTrue(copy.SequenceEqual(values.AsEnumerable().Reverse()));
}
public void TestInsertItems()
{
var values = Enumerable.Range(0, 20).ToList();
var source = new ObservableCollection <int>(values.Skip(5).Take(5));
var rrool = new ReversedReadOnlyObservableList <int>(source.ListAsObservable());
var copy = rrool.ListSelect(x => x);
foreach (var i in values.Skip(15))
{
source.Add(i);
}
for (int i = 0; i < 5; i++)
{
source.Insert(5 + i, values[10 + i]);
}
for (int i = 0; i < 5; i++)
{
source.Insert(i, values[i]);
}
Assert.AreEqual(20, rrool.Count);
Assert.IsTrue(rrool.SequenceEqual(values.AsEnumerable().Reverse()));
Assert.IsTrue(copy.SequenceEqual(values.AsEnumerable().Reverse()));
}