public void DelegateKeyCollection_Sort()
{
var col = new DelegateKeyedCollection <int, string>((s) => s == null ? 0 : s.Length);
col.Add("string1");
col.Add("string333");
col.Add("string22");
Assert.AreEqual("string1", col.ElementAt(0));
Assert.AreEqual("string333", col.ElementAt(1));
Assert.AreEqual("string22", col.ElementAt(2));
col.Sort();
Assert.AreEqual("string1", col.ElementAt(0));
Assert.AreEqual("string22", col.ElementAt(1));
Assert.AreEqual("string333", col.ElementAt(2));
Assert.AreEqual("string22", col[8]);
}
public void DelegateKeyCollection_Sort_ItemComparer()
{
var col = new DelegateKeyedCollection <int, string>((s) => s == null ? 0 : s.Length);
col.Add("string1");
col.Add("string333");
col.Add("string22");
Assert.AreEqual("string1", col.ElementAt(0));
Assert.AreEqual("string333", col.ElementAt(1));
Assert.AreEqual("string22", col.ElementAt(2));
// reverse list by item value (not key)
col.Sort((x, y) => string.Compare(y, x, StringComparison.Ordinal));
Assert.AreEqual("string333", col.ElementAt(0));
Assert.AreEqual("string22", col.ElementAt(1));
Assert.AreEqual("string1", col.ElementAt(2));
Assert.AreEqual("string22", col[8]);
}