public void GetAncestors()
{
TreeNode root = new TreeNode();
// Children of root
TreeNode a = new TreeNode { Parent = root };
TreeNode b = new TreeNode { Parent = root };
TreeNode c = new TreeNode { Parent = root };
root.Children.Add(a);
root.Children.Add(b);
root.Children.Add(c);
// Children of a
TreeNode d = new TreeNode { Parent = a };
TreeNode e = new TreeNode { Parent = a };
a.Children.Add(d);
a.Children.Add(e);
// b has no children
// Children of c
TreeNode f = new TreeNode { Parent = c };
TreeNode g = new TreeNode { Parent = c };
c.Children.Add(f);
c.Children.Add(g);
// Children of f
TreeNode h = new TreeNode { Parent = f };
f.Children.Add(h);
Assert.AreEqual(0, TreeHelper.GetAncestors(root, t => t.Parent).Count());
var ancestorsOfA = TreeHelper.GetAncestors(a, t => t.Parent).ToArray();
Assert.AreEqual(1, ancestorsOfA.Length);
Assert.AreSame(root, ancestorsOfA[0]);
var ancestorsOfH = TreeHelper.GetAncestors(h, t => t.Parent).ToArray();
Assert.AreEqual(3, ancestorsOfH.Length);
Assert.AreSame(f, ancestorsOfH[0]);
Assert.AreSame(c, ancestorsOfH[1]);
Assert.AreSame(root, ancestorsOfH[2]);
}
public void GetDepth()
{
TreeNode root = new TreeNode();
// Children of root
TreeNode a = new TreeNode { Parent = root };
TreeNode b = new TreeNode { Parent = root };
TreeNode c = new TreeNode { Parent = root };
root.Children.Add(a);
root.Children.Add(b);
root.Children.Add(c);
// Children of a
TreeNode d = new TreeNode { Parent = a };
TreeNode e = new TreeNode { Parent = a };
a.Children.Add(d);
a.Children.Add(e);
// b has no children
// Children of c
TreeNode f = new TreeNode { Parent = c };
TreeNode g = new TreeNode { Parent = c };
c.Children.Add(f);
c.Children.Add(g);
// Children of f
TreeNode h = new TreeNode { Parent = f };
f.Children.Add(h);
Assert.AreEqual(0, TreeHelper.GetDepth(root, t => t.Parent));
Assert.AreEqual(1, TreeHelper.GetDepth(a, t => t.Parent));
Assert.AreEqual(1, TreeHelper.GetDepth(b, t => t.Parent));
Assert.AreEqual(1, TreeHelper.GetDepth(c, t => t.Parent));
Assert.AreEqual(2, TreeHelper.GetDepth(d, t => t.Parent));
Assert.AreEqual(2, TreeHelper.GetDepth(e, t => t.Parent));
Assert.AreEqual(2, TreeHelper.GetDepth(f, t => t.Parent));
Assert.AreEqual(2, TreeHelper.GetDepth(g, t => t.Parent));
Assert.AreEqual(3, TreeHelper.GetDepth(h, t => t.Parent));
}
public void GetAncestorsOfARootNode()
{
TreeNode root = new TreeNode();
Assert.AreEqual(0, TreeHelper.GetAncestors(root, t => t.Parent).Count());
}
public void GetSubtree()
{
TreeNode root = new TreeNode();
// Children of root
TreeNode a = new TreeNode { Parent = root };
TreeNode b = new TreeNode { Parent = root };
TreeNode c = new TreeNode { Parent = root };
root.Children.Add(a);
root.Children.Add(b);
root.Children.Add(c);
// Children of a
TreeNode d = new TreeNode { Parent = a };
TreeNode e = new TreeNode { Parent = a };
a.Children.Add(d);
a.Children.Add(e);
// b has no children
// Children of c
TreeNode f = new TreeNode { Parent = c };
TreeNode g = new TreeNode { Parent = c };
c.Children.Add(f);
c.Children.Add(g);
// Children of f
TreeNode h = new TreeNode { Parent = f };
f.Children.Add(h);
Assert.AreEqual(1, TreeHelper.GetSubtree(b, t => t.Children).Count());
// Depth-first
var subtreeOfRoot = TreeHelper.GetSubtree(root, t => t.Children).ToArray();
Assert.AreEqual(9, subtreeOfRoot.Length);
Assert.AreSame(root, subtreeOfRoot[0]);
Assert.AreSame(a, subtreeOfRoot[1]);
Assert.AreSame(d, subtreeOfRoot[2]);
Assert.AreSame(e, subtreeOfRoot[3]);
Assert.AreSame(b, subtreeOfRoot[4]);
Assert.AreSame(c, subtreeOfRoot[5]);
Assert.AreSame(f, subtreeOfRoot[6]);
Assert.AreSame(h, subtreeOfRoot[7]);
Assert.AreSame(g, subtreeOfRoot[8]);
// Breadth-first
subtreeOfRoot = TreeHelper.GetSubtree(root, t => t.Children, false).ToArray();
Assert.AreEqual(9, subtreeOfRoot.Length);
Assert.AreSame(root, subtreeOfRoot[0]);
Assert.AreSame(a, subtreeOfRoot[1]);
Assert.AreSame(b, subtreeOfRoot[2]);
Assert.AreSame(c, subtreeOfRoot[3]);
Assert.AreSame(d, subtreeOfRoot[4]);
Assert.AreSame(e, subtreeOfRoot[5]);
Assert.AreSame(f, subtreeOfRoot[6]);
Assert.AreSame(g, subtreeOfRoot[7]);
Assert.AreSame(h, subtreeOfRoot[8]);
}
public void GetSelfAndAncestors()
{
TreeNode root = new TreeNode();
// Children of root
TreeNode a = new TreeNode { Parent = root };
TreeNode b = new TreeNode { Parent = root };
TreeNode c = new TreeNode { Parent = root };
root.Children.Add(a);
root.Children.Add(b);
root.Children.Add(c);
// Children of a
TreeNode d = new TreeNode { Parent = a };
TreeNode e = new TreeNode { Parent = a };
a.Children.Add(d);
a.Children.Add(e);
// b has no children
// Children of c
TreeNode f = new TreeNode { Parent = c };
TreeNode g = new TreeNode { Parent = c };
c.Children.Add(f);
c.Children.Add(g);
// Children of f
TreeNode h = new TreeNode { Parent = f };
f.Children.Add(h);
Assert.AreEqual(1, TreeHelper.GetSelfAndAncestors(root, t => t.Parent).Count());
var aAndAncestors = TreeHelper.GetSelfAndAncestors(a, t => t.Parent).ToArray();
Assert.AreEqual(2, aAndAncestors.Length);
Assert.AreSame(a, aAndAncestors[0]);
Assert.AreSame(root, aAndAncestors[1]);
var hAndAncestors = TreeHelper.GetSelfAndAncestors(h, t => t.Parent).ToArray();
Assert.AreEqual(4, hAndAncestors.Length);
Assert.AreSame(h, hAndAncestors[0]);
Assert.AreSame(f, hAndAncestors[1]);
Assert.AreSame(c, hAndAncestors[2]);
Assert.AreSame(root, hAndAncestors[3]);
}
public void GetRootOfARootNode()
{
TreeNode root = new TreeNode();
Assert.AreEqual(root, TreeHelper.GetRoot(root, t => t.Parent));
}
public void GetLeaves()
{
TreeNode root = new TreeNode();
// Children of root
TreeNode a = new TreeNode { Parent = root };
TreeNode b = new TreeNode { Parent = root };
TreeNode c = new TreeNode { Parent = root };
root.Children.Add(a);
root.Children.Add(b);
root.Children.Add(c);
// Children of a
TreeNode d = new TreeNode { Parent = a };
TreeNode e = new TreeNode { Parent = a };
a.Children.Add(d);
a.Children.Add(e);
// b has no children
// Children of c
TreeNode f = new TreeNode { Parent = c };
TreeNode g = new TreeNode { Parent = c };
c.Children.Add(f);
c.Children.Add(g);
// Children of f
TreeNode h = new TreeNode { Parent = f };
f.Children.Add(h);
var leavesOfB = TreeHelper.GetLeaves(b, t => t.Children).ToArray();
Assert.AreEqual(1, leavesOfB.Length);
Assert.AreSame(b, leavesOfB[0]);
var leavesOfRoot = TreeHelper.GetLeaves(root, t => t.Children).ToArray();
Assert.AreEqual(5, leavesOfRoot.Length);
Assert.AreSame(d, leavesOfRoot[0]);
Assert.AreSame(e, leavesOfRoot[1]);
Assert.AreSame(b, leavesOfRoot[2]);
Assert.AreSame(h, leavesOfRoot[3]);
Assert.AreSame(g, leavesOfRoot[4]);
}