public void SourceManipulation()
{
var numbers = new SynchronizedRangeObservableCollection <int>(null, System.Linq.Enumerable.Range(0, 10).SelectMany(i => i.Repeat(5)));
using var query = numbers.ActiveDistinct();
Assert.AreEqual(0, query.GetElementFaults().Count);
Assert.AreEqual(10, query.Count);
numbers.RemoveAt(0);
Assert.AreEqual(10, query.Count);
numbers.RemoveRange(0, 4);
Assert.AreEqual(9, query.Count);
numbers.Add(10);
Assert.AreEqual(10, query.Count);
numbers.AddRange(10.Repeat(4));
Assert.AreEqual(10, query.Count);
numbers.Reset(System.Linq.Enumerable.Range(0, 5).SelectMany(i => i.Repeat(2)));
Assert.AreEqual(5, query.Count);
}
public void ExpressionlessSourceManipulation()
{
var numbers = new SynchronizedRangeObservableCollection <int>();
using var aggregate = numbers.ActiveSum();
Assert.IsNull(aggregate.OperationFault);
Assert.AreEqual(0, aggregate.Value);
numbers.Add(1);
Assert.IsNull(aggregate.OperationFault);
Assert.AreEqual(1, aggregate.Value);
numbers.AddRange(System.Linq.Enumerable.Range(2, 3));
Assert.AreEqual(10, aggregate.Value);
numbers.RemoveRange(0, 2);
Assert.AreEqual(7, aggregate.Value);
numbers.RemoveAt(0);
Assert.AreEqual(4, aggregate.Value);
numbers.Reset(System.Linq.Enumerable.Range(1, 3));
Assert.AreEqual(6, aggregate.Value);
}
public void ExpressionlessSourceManipulation()
{
var numbers = new SynchronizedRangeObservableCollection <decimal>();
using var aggregate = numbers.ActiveAverage();
Assert.IsNotNull(aggregate.OperationFault);
Assert.AreEqual(0, aggregate.Value);
numbers.Add(1m);
Assert.IsNull(aggregate.OperationFault);
Assert.AreEqual(1m, aggregate.Value);
numbers.AddRange(System.Linq.Enumerable.Range(2, 3).Select(i => Convert.ToDecimal(i)));
Assert.AreEqual(2.5m, aggregate.Value);
numbers.RemoveRange(0, 2);
Assert.AreEqual(3.5m, aggregate.Value);
numbers.RemoveAt(0);
Assert.AreEqual(4m, aggregate.Value);
numbers.RemoveAt(0);
Assert.IsNotNull(aggregate.OperationFault);
Assert.AreEqual(0m, aggregate.Value);
numbers.Reset(System.Linq.Enumerable.Range(2, 3).Select(i => Convert.ToDecimal(i)));
Assert.IsNull(aggregate.OperationFault);
Assert.AreEqual(3m, aggregate.Value);
}
public void SourceManipulation()
{
var things = new SynchronizedRangeObservableCollection <object>(new object[]
{
0,
false,
"John",
DateTime.Now,
"Emily",
Guid.NewGuid(),
"Charles",
TimeSpan.Zero,
new object()
});
using var strings = things.ActiveOfType <string>();
void checkStrings(params string[] against) => Assert.IsTrue(strings.OrderBy(s => s).SequenceEqual(against));
checkStrings("Charles", "Emily", "John");
things.Add("Bridget");
things.Remove("John");
things.Move(things.Count - 1, 0);
checkStrings("Bridget", "Charles", "Emily");
things.Reset(new object[]
{
new object(),
TimeSpan.Zero,
"George",
Guid.NewGuid(),
"Craig",
DateTime.Now,
"Cliff",
false,
0
});
checkStrings("Cliff", "Craig", "George");
}