public void HasParent_NullNode_ThrowsArgumentNullException()
{
// Get a valid ITreeWalker.
NodeWalker <int> walker = new NodeWalker <int>();
Assert.Throws <ArgumentNullException>("node", () => walker.HasParent(null));
}
public void HasParent_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.HasParent(tree));
}
public void HasParent_NodeDoesNotHaveParent_ReturnsFalse()
{
// Get a valid tree.
var tree =
Node.Create(0).AddChildren(
Node.Create(1));
// Get a valid ITreeWalker.
NodeWalker <int> walker = new NodeWalker <int>();
Assert.False(walker.HasParent(tree));
}
public void HasParent_NodeHasParent_ReturnsTrue()
{
// Get a valid tree.
var tree =
Node.Create(0).AddChildren(
Node.Create(1));
// Get a valid ITreeWalker.
NodeWalker <int> walker = new NodeWalker <int>();
Assert.True(walker.HasParent(tree[0]));
}