public void TryGetChildAt_NoChildren_GetChildrenReturnsIEnumerable_ReturnsFalse()
{
// Get a valid tree.
var tree = Node.Create(0);
// Get a valid ITreeWalker.
NodeWalker <int> walker = new NodeWalker <int>();
// Try and get a child at an invalid index.
Node <int> node;
bool result = walker.TryGetChildAt(tree, 0, out node);
// Assert.
Assert.Null(node);
Assert.False(result);
}
public void TryGetChildAt_ValidIndex_GetChildrenReturnsIEnumerable_ReturnsTrue()
{
// Get a valid tree.
var tree =
Node.Create(0).AddChildren(
Node.Create(1));
// Get a valid ITreeWalker.
NodeWalker <int> walker = new NodeWalker <int>();
// Try and get a child at a valid index.
Node <int> node;
bool result = walker.TryGetChildAt(tree, 0, out node);
// Assert.
Assert.Equal(1, node.Value);
Assert.True(result);
}
public void TryGetChildAt_InvalidIndex_GetChildrenReturnsIList_ReturnsFalse()
{
// Get a valid tree.
var tree =
Node.Create(0).AddChildren(
Node.Create(1));
// Get a valid ITreeWalker.
NodeWalker <int> walker = new NodeWalker <int>()
{
ReturnChildrenAsList = true
};
// Try and get a child at an invalid index.
Node <int> node;
bool result = walker.TryGetChildAt(tree, 1, out node);
// Assert.
Assert.Null(node);
Assert.False(result);
}
