public void GetHeight_NullNode_ArgumentNullExceptionThrown()
{
// Create a valid ITreeWalker.
NodeWalker <int> walker = new NodeWalker <int>();
// Assert that 'GetHeight' throws an 'ArgumentNullException' when the node is null.
Assert.Throws <ArgumentNullException>("node", () => walker.GetHeight(null));
}
public void GetHeight()
{
// Get a valid tree.
var tree = TestTreeFactory.GetSimpleTree();
// Get a valid ITreeWalker.
NodeWalker <int> walker = new NodeWalker <int>();
// For each node in the tree assert that 'GetHeight' returns the correct elements.
Assert.Equal(
3,
walker.GetHeight(tree));
Assert.Equal(
1,
walker.GetHeight(tree[0]));
Assert.Equal(
0,
walker.GetHeight(tree[0][0]));
Assert.Equal(
0,
walker.GetHeight(tree[0][1]));
Assert.Equal(
2,
walker.GetHeight(tree[1]));
Assert.Equal(
1,
walker.GetHeight(tree[1][0]));
Assert.Equal(
0,
walker.GetHeight(tree[1][0][0]));
}
public void GetHeight_NullWalker_ArgumentNullExceptionThrown()
{
// Get a valid tree.
var tree = TestTreeFactory.GetSimpleTree();
// Create a null ITreeWalker.
NodeWalker <int> walker = null;
// Assert that 'GetHeight' throws an 'ArgumentNullException' when the tree walker
// is null.
Assert.Throws <ArgumentNullException>("walker", () => walker.GetHeight(tree));
}
