public void GetAncestorsAndSelf_NullNode_ThrowsArgumentNullException()
{
// Get a valid ITreeWalker.
NodeWalker <int> walker = new NodeWalker <int>();
Assert.Throws <ArgumentNullException>(
"node",
() => walker.GetAncestorsAndSelf(null).ToArray());
}
public void GetAncestorsAndSelf_SingleNodeInTree_NodeReturned()
{
// Get tree with a single node.
var tree = Node.Create(0);
// Get a valid ITreeWalker.
NodeWalker <int> walker = new NodeWalker <int>();
// Assert.
Assert.Equal(
EnumerableEx.Return(tree).ToArray(),
walker.GetAncestorsAndSelf(tree).ToArray());
}
public void GetAncestorsAndSelf_NullTreeWalker_ThrowsArgumentNullException()
{
// Get a valid tree.
var tree =
Node.Create(0).AddChildren(
Node.Create(1));
// Get a null ITreeWalker.
NodeWalker <int> walker = null;
Assert.Throws <ArgumentNullException>(
"walker",
() => walker.GetAncestorsAndSelf(tree).ToArray());
}
public void GetAncestorsAndSelf_CorrectNodesReturned()
{
// Get a valid tree.
var tree =
Node.Create(0).AddChildren(
Node.Create(1).AddChildren(
Node.Create(2)));
// Get a valid ITreeWalker.
NodeWalker <int> walker = new NodeWalker <int>();
Node <int> node = tree[0][0];
// Assert.
Assert.Equal(
Enumerable.Concat(new Node <int>[] { node }, walker.GetAncestors(node)).ToArray(),
walker.GetAncestorsAndSelf(node).ToArray());
}