#!/usr/bin/env ruby

require 'test/unit'
require 'hpricot'
require 'load_files'

class TestAlter < Test::Unit::TestCase
  def setup
    @basic = Hpricot.parse(TestFiles::BASIC)
  end
  
  def test_before
    test0 = "<link rel='stylesheet' href='test0.css' />"
    @basic.at("link").before(test0)
    assert_equal 'test0.css', @basic.at("link").attributes['href']
  end

  def test_after
    test_inf = "<link rel='stylesheet' href='test_inf.css' />"
    @basic.search("link")[-1].after(test_inf)
    assert_equal 'test_inf.css', @basic.search("link")[-1].attributes['href']
  end

  def test_wrap
    ohmy = (@basic/"p.ohmy").wrap("<div id='wrapper'></div>")
    assert_equal 'wrapper', ohmy[0].parent['id']
    assert_equal 'ohmy', Hpricot(@basic.to_html).at("#wrapper").children[0]['class']
  end
  
  def test_add_class
    first_p = (@basic/"p:first").add_class("testing123")
    assert first_p[0].get_attribute("class").split(" ").include?("testing123")
    assert (Hpricot(@basic.to_html)/"p:first")[0].attributes["class"].split(" ").include?("testing123")
    assert !(Hpricot(@basic.to_html)/"p:gt(0)")[0].attributes["class"].split(" ").include?("testing123")
  end
  
  def test_change_attributes
    all_ps = (@basic/"p").attr("title", "Some Title")
    all_as = (@basic/"a").attr("href", "http://my_new_href.com")
    all_lb = (@basic/"link").attr("href") { |e| e.name }
    assert_changed(@basic, "p", all_ps) {|p| p.attributes["title"] == "Some Title"}
    assert_changed(@basic, "a", all_as) {|a| a.attributes["href"] == "http://my_new_href.com"}
    assert_changed(@basic, "link", all_lb) {|a| a.attributes["href"] == "link" }
  end
  
  def test_remove_attr
    all_rl = (@basic/"link").remove_attr("href")
    assert_changed(@basic, "link", all_rl) { |link| link['href'].nil? }
  end

  def test_remove_class
    all_c1 = (@basic/"p[@class*='last']").remove_class("last")
    assert_changed(@basic, "p[@class*='last']", all_c1) { |p| p['class'] == 'final' }
  end

  def test_remove_all_classes
    all_c2 = (@basic/"p[@class]").remove_class
    assert_changed(@basic, "p[@class]", all_c2) { |p| p['class'].nil? }
  end

  def assert_changed original, selector, set, &block
    assert set.all?(&block)
    assert Hpricot(original.to_html).search(selector).all?(&block)
  end
end
