public void AddRemoveWorksAsExpectedWithFEParent()
{
var logicalChildSupportStub = new LogicalChildSupportFEStub();
var collection = new ItemCollectionWithLogicalTreeSupport <object>(logicalChildSupportStub);
var objItem = new object();
{
collection.Add(objItem);
Assert.That(collection, Does.Contain(objItem));
Assert.That(LogicalTreeHelper.GetChildren(logicalChildSupportStub), Does.Contain(objItem));
Assert.That(collection.GetLogicalChildren(), Does.Contain(objItem));
}
var frameworkElement = new FrameworkElement();
{
collection.Add(frameworkElement);
Assert.That(collection, Does.Contain(frameworkElement));
Assert.That(LogicalTreeHelper.GetChildren(logicalChildSupportStub), Does.Contain(frameworkElement));
Assert.That(collection.GetLogicalChildren(), Does.Contain(frameworkElement));
}
var frameworkContentElement = new FrameworkContentElement();
{
collection.Add(frameworkContentElement);
Assert.That(collection, Does.Contain(frameworkContentElement));
Assert.That(LogicalTreeHelper.GetChildren(logicalChildSupportStub), Does.Contain(frameworkContentElement));
Assert.That(collection.GetLogicalChildren(), Does.Contain(frameworkContentElement));
}
// Remove
{
collection.Remove(frameworkElement);
Assert.That(collection, Does.Not.Contain(frameworkElement));
Assert.That(LogicalTreeHelper.GetChildren(logicalChildSupportStub), Does.Not.Contain(frameworkElement));
Assert.That(collection.GetLogicalChildren(), Does.Not.Contain(frameworkElement));
}
}
public void AddRemoveNullDoesNotThrow()
{
var logicalChildSupportStub = new LogicalChildSupportNoFEStub();
var collection = new ItemCollectionWithLogicalTreeSupport <object>(logicalChildSupportStub);
Assert.That(() => collection.Remove(null), Throws.Nothing);
Assert.That(() => collection.Add(null), Throws.Nothing);
}
public void CollectionOperationsWorkAsExpected()
{
var logicalChildSupportStub = new LogicalChildSupportNoFEStub();
var collection = new ItemCollectionWithLogicalTreeSupport <object>(logicalChildSupportStub);
var item1 = "Item_1";
var item2 = "Item_2";
var item3 = "Item_3";
// add items
{
collection.Add(item1);
collection.Add(item2);
collection.Add(item3);
}
Assert.That(collection.GetLogicalChildren(), Is.EquivalentTo(collection));
collection.Clear();
Assert.That(collection, Is.Empty);
Assert.That(collection.GetLogicalChildren(), Is.EquivalentTo(collection));
// add items
{
collection.Add(item1);
collection.Add(item2);
collection.Add(item3);
}
collection.RemoveAt(1);
Assert.That(collection, Is.EquivalentTo(new[] { item1, item3 }));
Assert.That(logicalChildSupportStub.LogicalChildren, Is.EquivalentTo(collection));
Assert.That(collection.GetLogicalChildren(), Is.EquivalentTo(collection));
collection[1] = item2;
Assert.That(collection, Is.EquivalentTo(new[] { item1, item2 }));
Assert.That(logicalChildSupportStub.LogicalChildren, Is.EquivalentTo(collection));
Assert.That(collection.GetLogicalChildren(), Is.EquivalentTo(collection));
collection.Insert(0, item3);
Assert.That(collection, Is.EquivalentTo(new[] { item3, item1, item2 }));
Assert.That(logicalChildSupportStub.LogicalChildren, Is.EquivalentTo(collection));
Assert.That(collection.GetLogicalChildren(), Is.EquivalentTo(collection));
collection.ReleaseLogicalOwnership();
Assert.That(collection, Is.EquivalentTo(new[] { item3, item1, item2 }));
Assert.That(logicalChildSupportStub.LogicalChildren, Is.Empty);
Assert.That(collection.GetLogicalChildren(), Is.Empty);
Assert.That(() => collection.ReleaseLogicalOwnership(), Throws.Nothing);
Assert.That(logicalChildSupportStub.LogicalChildren, Is.Empty);
Assert.That(collection.GetLogicalChildren(), Is.Empty);
var item4 = "Item_4";
collection.Add(item4);
Assert.That(collection, Is.EquivalentTo(new[] { item3, item1, item2, item4 }));
Assert.That(logicalChildSupportStub.LogicalChildren, Is.Empty);
Assert.That(collection.GetLogicalChildren(), Is.Empty);
collection.AquireLogicalOwnership();
Assert.That(collection, Is.EquivalentTo(new[] { item3, item1, item2, item4 }));
Assert.That(logicalChildSupportStub.LogicalChildren, Is.EquivalentTo(collection));
Assert.That(collection.GetLogicalChildren(), Is.EquivalentTo(collection));
Assert.That(() => collection.AquireLogicalOwnership(), Throws.Nothing);
Assert.That(logicalChildSupportStub.LogicalChildren, Is.EquivalentTo(collection));
Assert.That(collection.GetLogicalChildren(), Is.EquivalentTo(collection));
collection.ReleaseLogicalOwnership();
collection.Remove(item4);
Assert.That(collection, Is.EquivalentTo(new[] { item3, item1, item2 }));
Assert.That(logicalChildSupportStub.LogicalChildren, Is.Empty);
Assert.That(collection.GetLogicalChildren(), Is.Empty);
}