public void Test_AdvancedCollectionView_Filter_Preserves_Order_When_Inserting_After_Items_In_View()
{
var l = new ObservableCollection <string>
{
"lorem",
"ipsum",
"dolor",
"sitter",
"amet"
};
var a = new AdvancedCollectionView(l)
{
Filter = (x) => x.ToString().Length < 5
};
Assert.AreEqual(1, a.Count);
Assert.AreEqual(a[0], "amet");
a.Insert(0, "how");
Assert.AreEqual(2, a.Count);
Assert.AreEqual(a[0], "how");
Assert.AreEqual(a[1], "amet");
}
public void Test_AdvancedCollectionView_Filter_Preserves_Order()
{
var l = new ObservableCollection <string>
{
"lorem",
"ipsum",
"dolor",
"sit",
"amet"
};
var a = new AdvancedCollectionView(l)
{
Filter = (x) => x.ToString().Length < 5
};
Assert.AreEqual(2, a.Count);
Assert.AreEqual("sit", a[0]);
Assert.AreEqual("amet", a[1]);
a.Insert(4, "how");
Assert.AreEqual(3, a.Count);
Assert.AreEqual("sit", a[0]);
Assert.AreEqual("how", a[1]);
Assert.AreEqual("amet", a[2]);
}
public void Test_AdvancedCollectionView_Filter_Preserves_Order_When_Inserting_Duplicate()
{
var l = new ObservableCollection <string>
{
"lorem",
"ipsum",
"dolor",
"sit",
"amet"
};
var a = new AdvancedCollectionView(l)
{
Filter = (x) => x.ToString().Length >= 5
};
Assert.AreEqual(3, a.Count);
Assert.AreEqual("lorem", a[0]);
Assert.AreEqual("ipsum", a[1]);
Assert.AreEqual("dolor", a[2]);
a.Insert(3, "ipsum");
Assert.AreEqual(4, a.Count);
Assert.AreEqual("lorem", a[0]);
Assert.AreEqual("ipsum", a[1]);
Assert.AreEqual("dolor", a[2]);
Assert.AreEqual("ipsum", a[3]);
}