public void FindCommonAncestor_NullArgument_ThrowsArgumentNullException()
{
var folder = new Folder("Folder Name");
var exception = Assert.Throws<ArgumentNullException>(() => folder.FindCommonAncestor(null));
exception.ParamName.ShouldEqual("other");
}
public void FindCommonAncestor_ItsOwnParent_ReturnsParent()
{
var parentFolder = new Folder("Parent Folder Name");
var folder = new Folder("Folder Name", parentFolder);
ITreeItem commonAncestor = folder.FindCommonAncestor(parentFolder);
commonAncestor.ShouldEqual(parentFolder);
}
public void FindCommonAncestor_AFolderAndItsChild_ReturnsTheFolder()
{
var folder = new Folder("Folder");
var itsChild = new Folder("Its child", folder);
ITreeItem commonAncestor = folder.FindCommonAncestor(itsChild);
commonAncestor.ShouldEqual(folder);
}
public void FindCommonAncestor_TwoSiblings_ReturnsParent()
{
var parentFolder = new Folder("Parent Folder Name");
var sibling1 = new Folder("Sibling 1", parentFolder);
var sibling2 = new Folder("Sibling 2", parentFolder);
ITreeItem commonAncestor = sibling1.FindCommonAncestor(sibling2);
commonAncestor.ShouldEqual(parentFolder);
}
