require 'spec_helper'

shared_examples_for 'a tagged element' do

  # clazz must be defined by the calling file

  let(:element) { clazz.new }


  it 'has tags' do
    element.should respond_to(:tags)
    element.should respond_to(:tag_elements)
  end

  it 'can get and set its tags' do
    expect(element).to respond_to(:tags=)
    expect(element).to respond_to(:tag_elements=)

    element.tags = :some_tags
    element.tags.should == :some_tags
    element.tags = :some_other_tags
    element.tags.should == :some_other_tags

    element.tag_elements = :some_tag_elements
    element.tag_elements.should == :some_tag_elements
    element.tag_elements = :some_other_tag_elements
    element.tag_elements.should == :some_other_tag_elements
  end

  it 'starts with no tags' do
    element.tags.should == []
    element.tag_elements.should == []
  end

  it 'has applied tags' do
    element.should respond_to(:applied_tags)
    element.should respond_to(:applied_tag_elements)
  end

  it 'inherits its applied tags from its ancestors' do
    all_parent_tag_elements = [:parent_tag_element_1, :parent_tag_element_2, :grandparent_tag_element_1]
    all_parent_tags = ['@parent_tag_1', '@parent_tag_2', '@grandparent_tag_1']
    parent = double(:all_tags => all_parent_tags, :all_tag_elements => all_parent_tag_elements)

    element.parent_element = parent

    element.applied_tags.should == all_parent_tags
    element.applied_tag_elements.should == all_parent_tag_elements
  end

  it 'knows all of its applicable tags' do
    all_parent_tag_elements = [:parent_tag_element_1, :parent_tag_element_2, :grandparent_tag_element_1]
    all_parent_tags = ['@parent_tag_1', '@parent_tag_2', '@grandparent_tag_1']
    own_tags = ['@tag_1', '@tag_2']
    own_tag_elements = [:tag_element_1, :tag_element_2]

    parent = double(:all_tags => all_parent_tags, :all_tag_elements => all_parent_tag_elements)

    element.parent_element = parent
    element.tags = own_tags
    element.tag_elements = own_tag_elements

    element.all_tags.should == all_parent_tags + own_tags
    element.all_tag_elements.should == all_parent_tag_elements + own_tag_elements
  end

end