public void TestRemoveItems()
{
var values = Enumerable.Range(0, 20).ToList();
var source = new ObservableCollection <int>(values);
var range = new RangedReadOnlyObservableList <int>(source.ListAsObservable(), 3, 5);
// Remove pair values
for (int i = source.Count - 1; i >= 0; i--)
{
if (source[i] % 2 == 0)
{
source.RemoveAt(i);
}
}
Assert.AreEqual(5, range.Count);
Assert.IsTrue(range.SequenceEqual(source.Skip(3).Take(5)));
// Remove multiple of 3
for (int i = source.Count - 1; i >= 0; i--)
{
if (source[i] % 3 == 0)
{
source.RemoveAt(i);
}
}
Assert.AreEqual(4, range.Count);
Assert.IsTrue(range.SequenceEqual(source.Skip(3).Take(5)));
}
public void TestCountAndOffset()
{
var values = Enumerable.Range(0, 30).ToList();
var range = new RangedReadOnlyObservableList <int>(values.ListAsObservable(), 5, 7);
Assert.AreEqual(7, range.Count);
Assert.IsTrue(range.SequenceEqual(values.Skip(5).Take(7)));
range.MaxCount = 13;
Assert.AreEqual(13, range.Count);
Assert.IsTrue(range.SequenceEqual(values.Skip(5).Take(13)));
range.Offset = 22;
Assert.AreEqual(8, range.Count);
Assert.IsTrue(range.SequenceEqual(values.Skip(22).Take(13)));
range.MaxCount = 6;
Assert.AreEqual(6, range.Count);
Assert.IsTrue(range.SequenceEqual(values.Skip(22).Take(6)));
range.Offset = 17;
Assert.AreEqual(6, range.Count);
Assert.IsTrue(range.SequenceEqual(values.Skip(17).Take(6)));
range.MaxCount = 15;
Assert.AreEqual(13, range.Count);
Assert.IsTrue(range.SequenceEqual(values.Skip(17).Take(15)));
}
public void TestClearItems()
{
var values = Enumerable.Range(0, 20).ToList();
var source = new ObservableCollection <int>(values);
var range = new RangedReadOnlyObservableList <int>(source.ListAsObservable(), 11);
source.Clear();
Assert.AreEqual(0, range.Count);
}
public void TestSetItems()
{
var values = Enumerable.Range(0, 20).ToList();
var source = new ObservableCollection <int>(values);
var range = new RangedReadOnlyObservableList <int>(source.ListAsObservable(), 9);
for (int i = 0; i < source.Count; i++)
{
source[i] *= 2;
}
Assert.IsTrue(range.SequenceEqual(values.Skip(9).Select(i => 2 * i)));
}
public void TestMoveItems()
{
var values = Enumerable.Range(0, 20).ToList();
var source = new ObservableCollection <int>(values);
var range = new RangedReadOnlyObservableList <int>(source.ListAsObservable(), 7, 5);
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(5, range.Count);
values.Reverse();
Assert.IsTrue(range.SequenceEqual(values.Skip(7).Take(5)));
}
public void TestInsertItems()
{
var values = Enumerable.Range(0, 20).ToList();
var source = new ObservableCollection <int>(values.Skip(5).Take(5));
var range = new RangedReadOnlyObservableList <int>(source.ListAsObservable(), 5, 10);
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(10, range.Count);
Assert.IsTrue(range.SequenceEqual(values.Skip(5).Take(10)));
}
