require 'spec_helper'

describe Nutmeg::TagTree do

  before(:each) do
    tree = Tree::TreeNode.new("ROOT", {:tag_id => 0, :slug => "root"})
    tree << Tree::TreeNode.new("base", {:tag_id => 1, :slug => "base"}) << Tree::TreeNode.new("child", {:tag_id => 2, :slug => "child"})
    @tag_tree = Nutmeg::TagTree.new(tree)
  end

  describe "#initialize" do
    it "verifies initialize works correctly" do
      expect(@tag_tree.original.class).to eq(Tree::TreeNode)
    end
  end

  describe "#subtree" do
    it "returns a subtree starting at tag with slug 'base'" do
      expect(@tag_tree.original.size).to eq(3)
      expect(@tag_tree.subtree("base").original.size).to eq(2)
    end
  end

  describe "#get_paths_eager" do
    it 'verifies output is similar' do
      expect(@tag_tree.get_paths_eager(["base"]).first.first.class).to eq(@tag_tree.get_paths(["base", "child"]).first.first.class)
    end
  end

  describe "#get_paths_formatted" do
    it "returns base/child when using [1,2] as selector" do
      expect(@tag_tree.get_paths_formatted(["base", "child"]).first).to eq("base/child")
    end
  end

  context "Order paths by relevance" do
    describe "#get_paths_formatted" do
      it "returns paths in the right order" do
        data = File.open([Dir.pwd, "/spec/files/big_tree.json"].join)
        @tree_from_json = Nutmeg::TreeFromJson.new(data)
        subtree = @tree_from_json.tree.subtree("north")
        expect(subtree.get_paths_formatted(["north", "about", "milestones", "2014", "the-netherlands"])).to eq(["north/about/milestones/2014", "north/about/factsheets/2014"])
      end
    end
  end

  describe "descendant nodes" do
    it "Retrieve a path to a descendant node, given a leaf node" do
      path = @tag_tree.get_path_to_node("child")
      expect(path.length).to eql(2)
    end

    it "should get the path from the root to the leaf, not the other way round" do
      path = @tag_tree.get_path_to_node("child")
      expect(path.last.content[:slug]).to eql("child")
      expect(path.first.content[:slug]).to eql("base")
    end

    it "Retrieve a path to a descendant node, given a middle-tree node" do
      path = @tag_tree.get_path_to_node("base")
      expect(path.length).to eql(1)
    end
  end
end