public void FirstAncestorOrSelf_OnTreeItem_OfTypeRoot_ReturnsNull()
{
var root = EmptyRootNode.AddLeftContainers(EmptyContainerNode.AddItems(EmptyItemNode));
var item = root.LeftContainers[0].Items[0];
var ancestor = item.FirstAncestorOrSelf <RootContainerNode>(_ => false);
Assert.Null(ancestor);
}
public void Contains_Child_ReturnsFalse()
{
var root = EmptyRootNode.AddLeftContainers(OneItemContainerPackage.CreateContainer());
var otherContainer = root.LeftContainers[0].WithId("other");
var contains = root.Contains(otherContainer);
Assert.False(contains);
}
public void Contains_Grandchild_ReturnsTrue()
{
var root = EmptyRootNode.AddLeftContainers(OneItemContainerPackage.CreateContainer());
var item = root.LeftContainers[0].Items[0];
var contains = root.Contains(item);
Assert.True(contains);
}
public void Ancestors_OnGrandchild_ReturnsRoot()
{
var root = EmptyRootNode.AddLeftContainers(OneItemContainerPackage.CreateContainer());
var container = root.LeftContainers[0];
var ancestors = container.Items[0].Ancestors();
Assert.Collection(ancestors,
x => Assert.Same(container.Items, x),
x => Assert.Same(container, x),
x => Assert.Same(root.LeftContainers, x),
x => Assert.Same(root, x));
}
public static RootContainerNode Create()
{
var leaf = EmptyItemNode;
var container = EmptyContainerNode;
return(EmptyRootNode
.AddLeftContainers(
container.AddItems(leaf, leaf),
container.AddItems(leaf))
.AddRightContainers(
container.AddItems(leaf),
container.AddItems(leaf, leaf)));
}
public void Children_OnRoot_ReturnsOnlyDirectChildren()
{
const string Container1Id = "container1";
const string Container2Id = "container2";
var root = EmptyRootNode
.AddLeftContainers(OneItemContainerPackage.CreateContainer().WithId(Container1Id))
.AddRightContainers(OneItemContainerPackage.CreateContainer().WithId(Container2Id));
var children = root.Children();
Assert.Collection(children,
x => Assert.IsType <ContainerListNode>(x),
x => Assert.IsType <ContainerListNode>(x));
Assert.Collection((ContainerListNode)children.ElementAt(0),
x => Assert.True(x is ContainerNode c && c.Id == Container1Id));
Assert.Collection((ContainerListNode)children.ElementAt(1),
x => Assert.True(x is ContainerNode c && c.Id == Container2Id));
}