public void SimpleCollection()
{
var source = new[] { 2, 1, 5 };
var mapped = new MappedCollectionView <int, int>(source, r => r * 2);
Assert.Equal(3, mapped.Count);
Assert.Equal(new[] { 4, 2, 10 }, mapped);
}
public void ObservableCollection_Clear()
{
var source = new ObservableCollection <int>()
{
5, 2, 8, 9
};
var mapped = new MappedCollectionView <int, int>(source, r => r * 2);
Assert.Equal(4, mapped.Count);
Assert.Equal(new[] { 10, 4, 16, 18 }, mapped);
source.Clear();
Assert.Empty(mapped);
}
public void ObservableCollection_Replace()
{
var source = new ObservableCollection <int>()
{
5, 2, 8, 9
};
var mapped = new MappedCollectionView <int, int>(source, r => r * 2);
Assert.Equal(4, mapped.Count);
Assert.Equal(new[] { 10, 4, 16, 18 }, mapped);
source[1] = 7;
Assert.Equal(4, mapped.Count);
Assert.Equal(new[] { 10, 14, 16, 18 }, mapped);
}
public void ObservableCollection_Add()
{
var source = new ObservableCollection <int>()
{
5
};
var mapped = new MappedCollectionView <int, int>(source, r => r * 2);
Assert.Single(mapped);
Assert.Equal(new[] { 10 }, mapped);
source.Add(1);
Assert.Equal(2, mapped.Count);
Assert.Equal(new[] { 10, 2 }, mapped);
source.Insert(0, 9);
Assert.Equal(3, mapped.Count);
Assert.Equal(new[] { 18, 10, 2 }, mapped);
}