require 'spec_helper'
require 'tdiff_examples'

require 'tdiff/tdiff'

describe TDiff do
  include Helpers::Trees

  it_should_behave_like 'TDiff', :tdiff

  it "should detect when the order of children has changed" do
    changes = @tree.tdiff(@changed_order).to_a

    expect(changes.length).to eq(6)

    expect(changes[0][0]).to eq(' ')
    expect(changes[0][1]).to eq(@tree)

    expect(changes[1][0]).to eq('-')
    expect(changes[1][1]).to eq(@tree.children[0])

    expect(changes[2][0]).to eq(' ')
    expect(changes[2][1]).to eq(@tree.children[1])

    expect(changes[3][0]).to eq('+')
    expect(changes[3][1]).to eq(@changed_order.children[1])

    expect(changes[4][0]).to eq(' ')
    expect(changes[4][1]).to eq(@tree.children[1].children[0])

    expect(changes[5][0]).to eq(' ')
    expect(changes[5][1]).to eq(@tree.children[1].children[1])
  end
end