public void Write_InsertElement_ElementInserted()
{
var col = new ConcurrentObservableCollection <string>(new[] { "a", "b", "c" });
col.Insert(1, "x");
CollectionAssert.AreEqual(col, new[] { "a", "x", "b", "c" });
}
public async Task WriteInConcurrentObservableCollectionUIThread()
{
using (var collection = new ConcurrentObservableCollection <int>())
{
_collectionChangedCount = 0;
collection.CollectionChanged += Collection_CollectionChanged;
await TaskHelper.RunOnUIThreadAsync(() =>
{
for (int i = 1; i < 10000; i++)
{
for (int j = 1; j < 10; j++)
{
collection.Add(i *j);
}
collection.RemoveAt(collection.Count - 1);
collection.Remove(i);
collection.Move(0, 6);
collection.Insert(0, i *i);
}
}).ConfigureAwait(false);
Assert.AreEqual(79992, collection.Count);
Assert.AreEqual(129987, _collectionChangedCount);
}
}
public void Write_InsertElement_ElementInserted()
{
var col = new ConcurrentObservableCollection <string>(new[] { "a", "b", "c" });
col.Insert(1, "x");
col.Should().BeEquivalentTo("a", "x", "b", "c");
}
public void Write_ComplexOperation_CollectionUpdatedProperly()
{
var col = new ConcurrentObservableCollection <string>(new[] { "a", "b", "c" });
col.Add("d");
col.Remove("b");
col.Insert(0, "x");
col.AddRange(new[] { "z", "f", "y" });
col.RemoveAt(4);
col.RemoveRange(new[] { "y", "c" });
col[2] = "p";
CollectionAssert.AreEquivalent(new[] { "x", "a", "p", "f" }, col);
}
public void InsertIsThreadSafe()
{
var test = new ConcurrentObservableCollection <int>(Concurrent)
{
1, 2, 3
};
var task1 = Task.Run(() =>
{
foreach (var i in test)
{
Task.Delay(DelayTime).Wait();
}
});
var task2 = Task.Run(() =>
{
test.Insert(0, 4);
Task.Delay(DelayTime).Wait();
test.Insert(0, 5);
});
Task.WaitAll(task1, task2);
}
public void Write_InsertElement_FiresAddEvent()
{
var col = new ConcurrentObservableCollection <string>(new[] { "a", "b", "c" });
NotifyCollectionChangedEventArgs receivedArgs = null;
col.CollectionChanged += (sender, args) =>
{
if (args.Action == NotifyCollectionChangedAction.Add)
{
receivedArgs = args;
}
};
col.Insert(1, "x");
Assert.That(receivedArgs.NewStartingIndex, Is.EqualTo(1), "Index is wrong");
CollectionAssert.AreEquivalent(receivedArgs.NewItems, new[] { "x" }, "New items collection wrong");
}
public void Write_InsertElement_FiresAddEvent()
{
var col = new ConcurrentObservableCollection <string>(new[] { "a", "b", "c" });
NotifyCollectionChangedEventArgs receivedArgs = null;
col.CollectionChanged += (sender, args) =>
{
if (args.Action == NotifyCollectionChangedAction.Add)
{
receivedArgs = args;
}
};
col.Insert(1, "x");
receivedArgs.NewStartingIndex.Should().Be(1, "the index should be correct");
receivedArgs.NewItems.Should().BeEquivalentTo(new[] { "x" });
}
