public void ExpressionlessEmptySource()
{
var numbers = new ObservableDictionary <int, int>();
using var query = numbers.ActiveLast();
Assert.IsNotNull(query.OperationFault);
Assert.AreEqual(0, query.Value.Value);
}
public void SourceManipulation()
{
var numbers = new ObservableDictionary <int, int>(Enumerable.Range(0, 10).ToDictionary(i => i));
using var query = numbers.ActiveLast((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.IsNotNull(query.OperationFault);
Assert.AreEqual(0, query.Value.Value);
numbers.Add(30, 30);
Assert.IsNull(query.OperationFault);
Assert.AreEqual(30, query.Value.Value);
}
public void ExpressionlessSourceManipulation()
{
var numbers = new ObservableDictionary <int, int>(Enumerable.Range(0, 10).ToDictionary(i => i));
using var query = numbers.ActiveLast();
Assert.IsNull(query.OperationFault);
Assert.AreEqual(9, query.Value.Value);
numbers.Remove(9);
Assert.AreEqual(8, query.Value.Value);
numbers.Clear();
Assert.IsNotNull(query.OperationFault);
Assert.AreEqual(0, query.Value.Value);
numbers.Add(30, 30);
Assert.IsNull(query.OperationFault);
Assert.AreEqual(30, query.Value.Value);
}
