public void SourceManipulation()
{
var numbers = new ObservableDictionary <int, int>(System.Linq.Enumerable.Range(1, 3).ToDictionary(i => i));
using (var expr = numbers.ActiveSingleOrDefault((key, value) => value % 3 == 0))
{
Assert.IsNull(expr.OperationFault);
Assert.AreEqual(3, expr.Value.Value);
numbers.Remove(3);
Assert.IsNull(expr.OperationFault);
Assert.AreEqual(0, expr.Value.Value);
numbers.Add(3, 3);
Assert.IsNull(expr.OperationFault);
Assert.AreEqual(3, expr.Value.Value);
numbers.Add(5, 5);
Assert.IsNull(expr.OperationFault);
Assert.AreEqual(3, expr.Value.Value);
numbers.Add(6, 6);
Assert.IsNotNull(expr.OperationFault);
Assert.AreEqual(0, expr.Value.Value);
numbers.Clear();
Assert.IsNull(expr.OperationFault);
Assert.AreEqual(0, expr.Value.Value);
}
}
public void Multiple()
{
var numbers = new ObservableDictionary <int, int>(Enumerable.Range(1, 3).ToDictionary(i => i, i => i * 3));
using var expr = numbers.ActiveSingleOrDefault((key, value) => value % 3 == 0);
Assert.IsNotNull(expr.OperationFault);
Assert.AreEqual(0, expr.Value.Value);
}
public void ExpressionlessMultiple()
{
var numbers = new ObservableDictionary <int, int>(Enumerable.Range(1, 2).ToDictionary(i => i));
using var expr = numbers.ActiveSingleOrDefault();
Assert.IsNotNull(expr.OperationFault);
Assert.AreEqual(0, expr.Value.Value);
}
public void ExpressionlessEmptySource()
{
var numbers = new ObservableDictionary <int, int>();
using var expr = numbers.ActiveSingleOrDefault();
Assert.IsNull(expr.OperationFault);
Assert.AreEqual(0, expr.Value.Value);
}
public void EmptySource()
{
var numbers = new ObservableDictionary <int, int>();
using (var expr = numbers.ActiveSingleOrDefault((key, value) => value % 3 == 0))
{
Assert.IsNull(expr.OperationFault);
Assert.AreEqual(0, expr.Value.Value);
}
}
public void ExpressionlessSourceManipulation()
{
var numbers = new ObservableDictionary <int, int>(Enumerable.Range(1, 1).ToDictionary(i => i));
using var expr = numbers.ActiveSingleOrDefault();
Assert.IsNull(expr.OperationFault);
Assert.AreEqual(1, expr.Value.Value);
numbers.Add(2, 2);
Assert.IsNotNull(expr.OperationFault);
Assert.AreEqual(0, expr.Value.Value);
numbers.Remove(1);
Assert.IsNull(expr.OperationFault);
Assert.AreEqual(2, expr.Value.Value);
numbers.Clear();
Assert.IsNull(expr.OperationFault);
Assert.AreEqual(0, expr.Value.Value);
}
