/// <summary>
/// Tests linked list and adjacent nodes for correct linking and ownership.
/// </summary>
/// <typeparam name="T">The type of a value for the test container item.</typeparam>
/// <param name="list">Linked list owning the nodes being tested.</param>
/// <param name="head">The head node of a container.</param>
/// <param name="prev">The preceding node adjacent to the source node.</param>
/// <param name="next">The following node adjacent to the source node.</param>
/// <param name="tail">The tail node of a container.</param>
public static void AssertNode <T>(OrderedContainer <T> list, OrderedContainer <T> .OrderedNode head, OrderedContainer <T> .OrderedNode prev, OrderedContainer <T> .OrderedNode next, OrderedContainer <T> .OrderedNode tail)
where T : IComparable <T>
{
Assert.AreEqual(head, list.Head, $"Container Property: {nameof(list.Head)}");
Assert.AreEqual(tail, list.Tail, $"Container Property: {nameof(list.Tail)}");
if (prev != null)
{
Assert.AreEqual(list, prev.Parent, $"Prev Property: {nameof(prev.Parent)}");
}
if (next != null)
{
Assert.AreEqual(list, next.Parent, $"Next Property: {nameof(next.Parent)}");
}
}
public void OrderedListLinks_Decrementor_MiddleUpper()
{
var container = new OrderedContainer <double>();
var node1 = new OrderedContainer <double> .OrderedNode(0).InsertNext(container);
var node2 = new OrderedContainer <double> .OrderedNode(1).InsertNext(container);
var node3 = new OrderedContainer <double> .OrderedNode(2).InsertNext(container);
var node4 = new OrderedContainer <double> .OrderedNode(3).InsertNext(container);
var node5 = new OrderedContainer <double> .OrderedNode(4).InsertNext(container);
AssertSequence(container.GetDecrement(node5, node2).ToList(), 4, 3, 2, 1);
}
public void OrderedListLinks_Decrementor_OpenLower()
{
var container = new OrderedContainer <double>();
var node1 = new OrderedContainer <double> .OrderedNode(0).InsertNext(container);
var node2 = new OrderedContainer <double> .OrderedNode(1).InsertNext(container);
var node3 = new OrderedContainer <double> .OrderedNode(2).InsertNext(container);
var node4 = new OrderedContainer <double> .OrderedNode(3).InsertNext(container);
var node5 = new OrderedContainer <double> .OrderedNode(4).InsertNext(container);
AssertSequence(container.GetDecrement(upper: node3).ToList(), 2, 1, 0);
}
public void OrderedListLinks_Incrementor_MiddleLower()
{
var container = new OrderedContainer <double>();
var node1 = new OrderedContainer <double> .OrderedNode(0).InsertNext(container);
var node2 = new OrderedContainer <double> .OrderedNode(1).InsertNext(container);
var node3 = new OrderedContainer <double> .OrderedNode(2).InsertNext(container);
var node4 = new OrderedContainer <double> .OrderedNode(3).InsertNext(container);
var node5 = new OrderedContainer <double> .OrderedNode(4).InsertNext(container);
AssertSequence(container.GetIncrement(node2, node5).ToList(), 1, 2, 3, 4);
}
/// <summary>
/// Tests linked list and adjacent nodes for correct linking and ownership.
/// </summary>
/// <typeparam name="T">The type of a value for the test container item.</typeparam>
/// <param name="link">The source node to test.</param>
/// <param name="prev">The preceding node adjacent to the source node.</param>
/// <param name="next">The following node adjacent to the source node.</param>
public static void AssertNode <T>(OrderedContainer <T> .OrderedNode link, OrderedContainer <T> .OrderedNode prev, OrderedContainer <T> .OrderedNode next)
where T : IComparable <T>
{
Assert.IsNotNull(link);
Assert.AreEqual(prev, link.InternalPrev, $"Node Property: {nameof(link.Prev)}");
Assert.AreEqual(next, link.InternalNext, $"Node Property: {nameof(link.Next)}");
if (prev != null)
{
Assert.AreEqual(link, prev.InternalNext, $"Prev Property: {nameof(prev.Next)}");
}
if (next != null)
{
Assert.AreEqual(link, next.InternalPrev, $"Next Property: {nameof(next.Prev)}");
}
}
public void List_WhenUnsubscribed_ShouldStopReceivingNotifications()
{
AsyncContext.Run(async delegate
{
var container = new OrderedContainer();
_realm.Write(() => _realm.Add(container));
var eventArgs = new List <NotifyCollectionChangedEventArgs>();
var handler = new NotifyCollectionChangedEventHandler((sender, e) =>
{
eventArgs.Add(e);
});
var propertyEventArgs = new List <string>();
var propertyHandler = new PropertyChangedEventHandler((sender, e) => propertyEventArgs.Add(e.PropertyName));
var collection = container.Items.AsRealmCollection();
collection.CollectionChanged += handler;
collection.PropertyChanged += propertyHandler;
_realm.Write(() =>
{
container.Items.Add(new OrderedObject());
});
await Task.Delay(MillisecondsToWaitForCollectionNotification);
Assert.That(eventArgs.Count, Is.EqualTo(1));
Assert.That(eventArgs[0].Action, Is.EqualTo(NotifyCollectionChangedAction.Add));
Assert.That(propertyEventArgs.Count, Is.EqualTo(2));
Assert.That(propertyEventArgs, Is.EquivalentTo(new[] { "Count", "Item[]" }));
collection.CollectionChanged -= handler;
collection.PropertyChanged -= propertyHandler;
_realm.Write(() =>
{
container.Items.Add(new OrderedObject());
});
await Task.Delay(MillisecondsToWaitForCollectionNotification);
Assert.That(eventArgs.Count, Is.EqualTo(1));
Assert.That(eventArgs[0].Action, Is.EqualTo(NotifyCollectionChangedAction.Add));
Assert.That(propertyEventArgs.Count, Is.EqualTo(2));
Assert.That(propertyEventArgs, Is.EquivalentTo(new[] { "Count", "Item[]" }));
});
}
public void OrderedListLinks_InsertPrev_Items2UpperSame2()
{
var container = new OrderedContainer <double>();
var node1 = new OrderedContainer <double> .OrderedNode(0).InsertPrev(container);
var node4 = new OrderedContainer <double> .OrderedNode(2).InsertPrev(container);
var node3 = new OrderedContainer <double> .OrderedNode(2).InsertPrev(container);
var node2 = new OrderedContainer <double> .OrderedNode(2).InsertPrev(container);
AssertNode(node1, container, node1, null, node2, node4);
AssertNode(node2, container, node1, node1, node3, node4);
AssertNode(node3, container, node1, node2, node4, node4);
AssertNode(node4, container, node1, node3, null, node4);
}
public void ListShouldSendNotifications()
{
var container = new OrderedContainer();
_realm.Write(() => _realm.Add(container));
ChangeSet changes = null;
NotificationCallbackDelegate <OrderedObject> cb = (s, c, e) => changes = c;
using (container.Items.SubscribeForNotifications(cb))
{
_realm.Write(() => container.Items.Add(new OrderedObject()));
_realm.Refresh();
Assert.That(changes, Is.Not.Null);
Assert.That(changes.InsertedIndices, Is.EquivalentTo(new int[] { 0 }));
}
}
public void ListShouldSendNotifications()
{
var container = new OrderedContainer();
_realm.Write(() => _realm.Add(container));
ChangeSet changes = null;
void OnNotification(IRealmCollection <OrderedObject> s, ChangeSet c, Exception e) => changes = c;
using (container.Items.SubscribeForNotifications(OnNotification))
{
_realm.Write(() => container.Items.Add(new OrderedObject()));
_realm.Refresh();
Assert.That(changes, Is.Not.Null);
Assert.That(changes.InsertedIndices, Is.EquivalentTo(new int[] { 0 }));
}
}
public void ListShouldSendNotifications()
{
AsyncContext.Run(async delegate
{
var container = new OrderedContainer();
_realm.Write(() => _realm.Add(container));
ChangeSet changes = null;
NotificationCallbackDelegate <OrderedObject> cb = (s, c, e) => changes = c;
using (container.Items.SubscribeForNotifications(cb))
{
_realm.Write(() => container.Items.Add(new OrderedObject()));
await Task.Delay(MillisecondsToWaitForCollectionNotification);
Assert.That(changes, Is.Not.Null);
Assert.That(changes.InsertedIndices, Is.EquivalentTo(new int[] { 0 }));
}
});
}
public void OrderedListLinks_InsertNext_Items5SequenceReverse()
{
var container = new OrderedContainer <double>();
var node5 = new OrderedContainer <double> .OrderedNode(4).InsertNext(container);
var node4 = new OrderedContainer <double> .OrderedNode(3).InsertNext(container);
var node3 = new OrderedContainer <double> .OrderedNode(2).InsertNext(container);
var node2 = new OrderedContainer <double> .OrderedNode(1).InsertNext(container);
var node1 = new OrderedContainer <double> .OrderedNode(0).InsertNext(container);
AssertNode(node1, container, node1, null, node2, node5);
AssertNode(node2, container, node1, node1, node3, node5);
AssertNode(node3, container, node1, node2, node4, node5);
AssertNode(node4, container, node1, node3, node5, node5);
AssertNode(node5, container, node1, node4, null, node5);
}
public void OrderedListLinks_InsertPrev_Items5DenseLeave()
{
var container = new OrderedContainer <double>();
var node1 = new OrderedContainer <double> .OrderedNode(0).InsertPrev(container);
var node5 = new OrderedContainer <double> .OrderedNode(4).InsertPrev(container);
var node3 = new OrderedContainer <double> .OrderedNode(2).InsertPrev(container);
var node2 = new OrderedContainer <double> .OrderedNode(1).InsertPrev(container);
var node4 = new OrderedContainer <double> .OrderedNode(3).InsertPrev(container);
AssertNode(node1, container, node1, null, node2, node5);
AssertNode(node2, container, node1, node1, node3, node5);
AssertNode(node3, container, node1, node2, node4, node5);
AssertNode(node4, container, node1, node3, node5, node5);
AssertNode(node5, container, node1, node4, null, node5);
}
public void TestRealmListNotifications(int[] initial, NotifyCollectionChangedAction action, int[] change, int startIndex)
{
AsyncContext.Run(async delegate
{
var container = new OrderedContainer();
foreach (var i in initial)
{
container.Items.Add(new OrderedObject { Order = i });
}
_realm.Write(() => _realm.Add(container));
Exception error = null;
_realm.Error += (sender, e) =>
{
error = e.Exception;
};
var collection = container.Items.AsRealmCollection();
var eventArgs = new List<NotifyCollectionChangedEventArgs>();
var propertyEventArgs = new List<string>();
collection.CollectionChanged += (o, e) => eventArgs.Add(e);
collection.PropertyChanged += (o, e) => propertyEventArgs.Add(e.PropertyName);
Assert.That(error, Is.Null);
_realm.Write(() =>
{
if (action == NotifyCollectionChangedAction.Add)
{
foreach (var value in change)
{
container.Items.Add(new OrderedObject
{
Order = value
});
}
}
else if (action == NotifyCollectionChangedAction.Remove)
{
foreach (var value in change)
{
container.Items.Remove(_realm.All<OrderedObject>().Single(o => o.Order == value));
}
}
});
await Task.Delay(MillisecondsToWaitForCollectionNotification);
Assert.That(error, Is.Null);
Assert.That(eventArgs.Count, Is.EqualTo(1));
var arg = eventArgs[0];
if (action == NotifyCollectionChangedAction.Add)
{
Assert.That(arg.Action == action);
Assert.That(arg.NewStartingIndex, Is.EqualTo(initial.Length));
Assert.That(arg.NewItems.Cast<OrderedObject>().Select(o => o.Order), Is.EquivalentTo(change));
}
else if (action == NotifyCollectionChangedAction.Remove)
{
if (startIndex < 0)
{
Assert.That(arg.Action == NotifyCollectionChangedAction.Reset);
}
else
{
Assert.That(arg.Action == action);
Assert.That(arg.OldStartingIndex, Is.EqualTo(startIndex));
Assert.That(arg.OldItems.Count, Is.EqualTo(change.Length));
}
}
Assert.That(propertyEventArgs.Count, Is.EqualTo(2));
Assert.That(propertyEventArgs, Is.EquivalentTo(new[] { "Count", "Item[]" }));
});
}
// Adds 5 OrderedObject to a List, executes moveAction and returns the single change notification argument.
private async Task<NotifyCollectionChangedEventArgs> TestMoves(Action<IList<OrderedObject>> moveAction, NotifyCollectionChangedAction expectedAction)
{
var container = new OrderedContainer();
for (var i = 0; i < 5; i++)
{
container.Items.Add(new OrderedObject
{
Order = i
});
}
_realm.Write(() => _realm.Add(container));
var eventArgs = new List<NotifyCollectionChangedEventArgs>();
var propertyEventArgs = new List<string>();
var collection = container.Items.AsRealmCollection();
collection.CollectionChanged += (sender, e) => eventArgs.Add(e);
collection.PropertyChanged += (sender, e) => propertyEventArgs.Add(e.PropertyName);
_realm.Write(() => moveAction(container.Items));
await Task.Delay(MillisecondsToWaitForCollectionNotification);
Assert.That(eventArgs.Count, Is.EqualTo(1));
Assert.That(eventArgs[0].Action, Is.EqualTo(expectedAction));
Assert.That(propertyEventArgs.Count, Is.EqualTo(2));
Assert.That(propertyEventArgs, Is.EquivalentTo(new[] { "Count", "Item[]" }));
return eventArgs[0];
}
public void List_WhenTransactionHasBothAddAndRemove_ShouldReset()
{
AsyncContext.Run(async delegate
{
// The INotifyCollectionChanged API doesn't have a mechanism to report both added and removed items,
// as that would mess up the indices a lot. That's why when we have both removed and added items,
// we should raise a Reset.
var container = new OrderedContainer();
container.Items.Add(new OrderedObject());
_realm.Write(() => _realm.Add(container));
var eventArgs = new List<NotifyCollectionChangedEventArgs>();
var propertyEventArgs = new List<string>();
var collection = container.Items.AsRealmCollection();
collection.CollectionChanged += (sender, e) => eventArgs.Add(e);
collection.PropertyChanged += (sender, e) => propertyEventArgs.Add(e.PropertyName);
_realm.Write(() =>
{
container.Items.Clear();
container.Items.Add(new OrderedObject());
});
await Task.Delay(MillisecondsToWaitForCollectionNotification);
Assert.That(eventArgs.Count, Is.EqualTo(1));
Assert.That(eventArgs[0].Action, Is.EqualTo(NotifyCollectionChangedAction.Reset));
Assert.That(propertyEventArgs.Count, Is.EqualTo(2));
Assert.That(propertyEventArgs, Is.EquivalentTo(new[] { "Count", "Item[]" }));
});
}
public void List_WhenUnsubscribed_ShouldStopReceivingNotifications()
{
AsyncContext.Run(async delegate
{
var container = new OrderedContainer();
_realm.Write(() => _realm.Add(container));
var eventArgs = new List<NotifyCollectionChangedEventArgs>();
var handler = new NotifyCollectionChangedEventHandler((sender, e) =>
{
eventArgs.Add(e);
});
var propertyEventArgs = new List<string>();
var propertyHandler = new PropertyChangedEventHandler((sender, e) => propertyEventArgs.Add(e.PropertyName));
var collection = container.Items.AsRealmCollection();
collection.CollectionChanged += handler;
collection.PropertyChanged += propertyHandler;
_realm.Write(() =>
{
container.Items.Add(new OrderedObject());
});
await Task.Delay(MillisecondsToWaitForCollectionNotification);
Assert.That(eventArgs.Count, Is.EqualTo(1));
Assert.That(eventArgs[0].Action, Is.EqualTo(NotifyCollectionChangedAction.Add));
Assert.That(propertyEventArgs.Count, Is.EqualTo(2));
Assert.That(propertyEventArgs, Is.EquivalentTo(new[] { "Count", "Item[]" }));
collection.CollectionChanged -= handler;
collection.PropertyChanged -= propertyHandler;
_realm.Write(() =>
{
container.Items.Add(new OrderedObject());
});
await Task.Delay(MillisecondsToWaitForCollectionNotification);
Assert.That(eventArgs.Count, Is.EqualTo(1));
Assert.That(eventArgs[0].Action, Is.EqualTo(NotifyCollectionChangedAction.Add));
Assert.That(propertyEventArgs.Count, Is.EqualTo(2));
Assert.That(propertyEventArgs, Is.EquivalentTo(new[] { "Count", "Item[]" }));
});
}
public void TestRealmListNotifications(int[] initial, NotifyCollectionChangedAction action, int[] change, int startIndex)
{
var container = new OrderedContainer();
foreach (var i in initial)
{
container.Items.Add(new OrderedObject {
Order = i
});
}
_realm.Write(() => _realm.Add(container));
Exception error = null;
_realm.Error += (sender, e) =>
{
error = e.Exception;
};
var collection = container.Items.AsRealmCollection();
var eventArgs = new List <NotifyCollectionChangedEventArgs>();
var propertyEventArgs = new List <string>();
collection.CollectionChanged += (o, e) => eventArgs.Add(e);
collection.PropertyChanged += (o, e) => propertyEventArgs.Add(e.PropertyName);
Assert.That(error, Is.Null);
_realm.Write(() =>
{
if (action == NotifyCollectionChangedAction.Add)
{
foreach (var value in change)
{
container.Items.Add(new OrderedObject
{
Order = value
});
}
}
else if (action == NotifyCollectionChangedAction.Remove)
{
foreach (var value in change)
{
container.Items.Remove(_realm.All <OrderedObject>().Single(o => o.Order == value));
}
}
});
_realm.Refresh();
Assert.That(error, Is.Null);
Assert.That(eventArgs.Count, Is.EqualTo(1));
var arg = eventArgs[0];
if (action == NotifyCollectionChangedAction.Add)
{
Assert.That(arg.Action == action);
Assert.That(arg.NewStartingIndex, Is.EqualTo(initial.Length));
Assert.That(arg.NewItems.Cast <OrderedObject>().Select(o => o.Order), Is.EquivalentTo(change));
}
else if (action == NotifyCollectionChangedAction.Remove)
{
if (startIndex < 0)
{
Assert.That(arg.Action == NotifyCollectionChangedAction.Reset);
}
else
{
Assert.That(arg.Action == action);
Assert.That(arg.OldStartingIndex, Is.EqualTo(startIndex));
Assert.That(arg.OldItems.Count, Is.EqualTo(change.Length));
}
}
Assert.That(propertyEventArgs.Count, Is.EqualTo(2));
Assert.That(propertyEventArgs, Is.EquivalentTo(new[] { "Count", "Item[]" }));
}
public void ListShouldSendNotifications()
{
AsyncContext.Run(async delegate
{
var container = new OrderedContainer();
_realm.Write(() => _realm.Add(container));
ChangeSet changes = null;
NotificationCallbackDelegate<OrderedObject> cb = (s, c, e) => changes = c;
using (container.Items.SubscribeForNotifications(cb))
{
_realm.Write(() => container.Items.Add(new OrderedObject()));
await Task.Delay(MillisecondsToWaitForCollectionNotification);
Assert.That(changes, Is.Not.Null);
Assert.That(changes.InsertedIndices, Is.EquivalentTo(new int[] { 0 }));
}
});
}