public void GetLeaves_NullNode_ArgumentNullExceptionThrown()
{
// Create a valid ITreeWalker.
NodeWalker <int> walker = new NodeWalker <int>();
// Assert that 'GetLeaves' throws an 'ArgumentNullException' when the node is null.
Assert.Throws <ArgumentNullException>("node", () => walker.GetLeaves(null).ToArray());
}
public void GetLeaves_NullWalker_ArgumentNullExceptionThrown()
{
// Get a valid tree.
var tree = TestTreeFactory.GetSimpleTree();
// Create a null ITreeWalker.
NodeWalker <int> walker = null;
// Assert that 'GetLeaves' throws an 'ArgumentNullException' when the tree walker
// is null.
Assert.Throws <ArgumentNullException>("walker", () => walker.GetLeaves(tree).ToArray());
}
public void GetLeaves(int[] testPath, int[] expected)
{
// Get a valid tree.
var tree = TestTreeFactory.GetSimpleTree();
// Get a valid ITreeWalker.
NodeWalker <int> walker = new NodeWalker <int>();
var node = tree;
foreach (int i in testPath)
{
node = walker.GetChildAt(node, i);
}
Assert.Equal(
expected,
walker.GetLeaves(node).Select(x => x.Value));
}
public void GetBranches_MultipleBranches()
{
// Get a valid tree.
var tree = TestTreeFactory.GetSimpleTree();
// Get a valid ITreeWalker.
NodeWalker <int> walker = new NodeWalker <int>();
// Assert.
Assert.Equal(
walker
.GetLeaves(tree)
.Select(x =>
EnumerableEx
.Return(x)
.Concat(walker.GetAncestors(x))
.Reverse()
.ToArray())
.ToArray(),
walker.GetBranches(tree).Select(x => x.ToArray()).ToArray());
}