public void ExpressionlessEmptySource()
{
var numbers = new ObservableDictionary <int, int>();
using (var query = numbers.ActiveLastOrDefault())
{
Assert.IsNull(query.OperationFault);
Assert.AreEqual(0, query.Value.Value);
}
}
public void SourceManipulation()
{
var numbers = new ObservableDictionary <int, int>(System.Linq.Enumerable.Range(0, 10).ToDictionary(i => i));
using (var query = numbers.ActiveLastOrDefault((key, value) => value % 3 == 0))
{
Assert.IsNull(query.OperationFault);
Assert.AreEqual(9, query.Value.Value);
numbers.Remove(9);
Assert.AreEqual(6, query.Value.Value);
numbers.RemoveAll((key, value) => value % 3 == 0);
Assert.IsNull(query.OperationFault);
Assert.AreEqual(0, query.Value.Value);
numbers.Add(30, 30);
Assert.IsNull(query.OperationFault);
Assert.AreEqual(30, query.Value.Value);
}
}
