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# frozen_string_literal: true
RSpec.shared_examples 'hierarchy with traversal_ids' do
# A convenient null node to represent the parent of root.
let(:null_node) { double(traversal_ids: []) }
# Walk the tree to assert that the current_node's traversal_id is always
# present and equal to it's parent's traversal_ids plus it's own ID.
def validate_traversal_ids(current_node, parent = null_node)
expect(current_node.traversal_ids).to be_present
expect(current_node.traversal_ids).to eq parent.traversal_ids + [current_node.id]
current_node.children.each do |child|
validate_traversal_ids(child, current_node)
end
end
it 'will be valid' do
validate_traversal_ids(root)
end
end
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