public void SourceManipulation()
{
var numbers = new SynchronizedRangeObservableCollection <int>(Enumerable.Range(1, 3));
using var expr = numbers.ActiveSingle(i => i % 3 == 0);
Assert.IsNull(expr.OperationFault);
Assert.AreEqual(3, expr.Value);
numbers.RemoveAt(2);
Assert.IsNotNull(expr.OperationFault);
Assert.AreEqual(0, expr.Value);
numbers.Add(3);
Assert.IsNull(expr.OperationFault);
Assert.AreEqual(3, expr.Value);
numbers.Add(5);
Assert.IsNull(expr.OperationFault);
Assert.AreEqual(3, expr.Value);
numbers.Add(6);
Assert.IsNotNull(expr.OperationFault);
Assert.AreEqual(0, expr.Value);
numbers.Clear();
Assert.IsNotNull(expr.OperationFault);
Assert.AreEqual(0, expr.Value);
numbers.Add(3);
numbers.Add(6);
Assert.IsNotNull(expr.OperationFault);
Assert.AreEqual(0, expr.Value);
numbers.RemoveAt(0);
Assert.IsNull(expr.OperationFault);
Assert.AreEqual(6, expr.Value);
}
public void ExpressionlessSourceManipulation()
{
var numbers = new SynchronizedRangeObservableCollection <int>(System.Linq.Enumerable.Range(0, 10));
using var query = numbers.ActiveLast();
Assert.IsNull(query.OperationFault);
Assert.AreEqual(9, query.Value);
numbers.Remove(9);
Assert.AreEqual(8, query.Value);
numbers.Clear();
Assert.IsNotNull(query.OperationFault);
Assert.AreEqual(0, query.Value);
numbers.Add(30);
Assert.IsNull(query.OperationFault);
Assert.AreEqual(30, query.Value);
}
public void ExpressionlessSourceManipulation()
{
var numbers = new SynchronizedRangeObservableCollection <int>(new int[] { 1 });
using var expr = numbers.ActiveSingle();
Assert.IsNull(expr.OperationFault);
Assert.AreEqual(1, expr.Value);
numbers.Add(2);
Assert.IsNotNull(expr.OperationFault);
Assert.AreEqual(0, expr.Value);
numbers.RemoveAt(0);
Assert.IsNull(expr.OperationFault);
Assert.AreEqual(2, expr.Value);
numbers.Clear();
Assert.IsNotNull(expr.OperationFault);
Assert.AreEqual(0, expr.Value);
}
public void SourceManipulation()
{
var numbers = new SynchronizedRangeObservableCollection <int>(Enumerable.Range(1, 10).Select(i => i * 3));
using var query = numbers.ActiveAll(i => i % 3 == 0);
Assert.IsNull(query.OperationFault);
Assert.IsTrue(query.Value);
numbers[0] = 2;
Assert.IsFalse(query.Value);
numbers.RemoveAt(0);
Assert.IsTrue(query.Value);
--numbers[0];
Assert.IsFalse(query.Value);
numbers.Clear();
Assert.IsTrue(query.Value);
numbers.Add(7);
Assert.IsFalse(query.Value);
}
public void NullKeys()
{
var john = new TestPerson(null);
var people = new SynchronizedRangeObservableCollection <TestPerson>();
using (var query = people.ToActiveDictionary(p => new KeyValuePair <string, TestPerson>(p.Name, p)))
{
Assert.IsNull(query.OperationFault);
people.Add(john);
Assert.IsNotNull(query.OperationFault);
john.Name = "John";
Assert.IsNull(query.OperationFault);
john.Name = null;
Assert.IsNotNull(query.OperationFault);
people.Clear();
Assert.IsNull(query.OperationFault);
}
}