begin
  require 'libxml'
rescue LoadError
  # Skip libxml tests
else
require 'abstract_unit'
require 'active_support/xml_mini'
require 'active_support/core_ext/hash/conversions'

class LibxmlEngineTest < ActiveSupport::TestCase
  include ActiveSupport

  def setup
    @default_backend = XmlMini.backend
    XmlMini.backend = 'LibXML'

    LibXML::XML::Error.set_handler(&lambda { |error| }) #silence libxml, exceptions will do
  end

  def teardown
    XmlMini.backend = @default_backend
  end

  def test_exception_thrown_on_expansion_attack
    assert_raise LibXML::XML::Error do
      attack_xml = %{<?xml version="1.0" encoding="UTF-8"?>
      <!DOCTYPE member [
        <!ENTITY a "&b;&b;&b;&b;&b;&b;&b;&b;&b;&b;">
        <!ENTITY b "&c;&c;&c;&c;&c;&c;&c;&c;&c;&c;">
        <!ENTITY c "&d;&d;&d;&d;&d;&d;&d;&d;&d;&d;">
        <!ENTITY d "&e;&e;&e;&e;&e;&e;&e;&e;&e;&e;">
        <!ENTITY e "&f;&f;&f;&f;&f;&f;&f;&f;&f;&f;">
        <!ENTITY f "&g;&g;&g;&g;&g;&g;&g;&g;&g;&g;">
        <!ENTITY g "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx">
      ]>
      <member>
      &a;
      </member>
     }
      Hash.from_xml(attack_xml)
    end
  end

  def test_setting_libxml_as_backend
    XmlMini.backend = 'LibXML'
    assert_equal XmlMini_LibXML, XmlMini.backend
  end

  def test_blank_returns_empty_hash
    assert_equal({}, XmlMini.parse(nil))
    assert_equal({}, XmlMini.parse(''))
  end

  def test_array_type_makes_an_array
    assert_equal_rexml(<<-eoxml)
      <blog>
        <posts type="array">
          <post>a post</post>
          <post>another post</post>
        </posts>
      </blog>
    eoxml
  end

  def test_one_node_document_as_hash
    assert_equal_rexml(<<-eoxml)
    <products/>
    eoxml
  end

  def test_one_node_with_attributes_document_as_hash
    assert_equal_rexml(<<-eoxml)
    <products foo="bar"/>
    eoxml
  end

  def test_products_node_with_book_node_as_hash
    assert_equal_rexml(<<-eoxml)
    <products>
      <book name="awesome" id="12345" />
    </products>
    eoxml
  end

  def test_products_node_with_two_book_nodes_as_hash
    assert_equal_rexml(<<-eoxml)
    <products>
      <book name="awesome" id="12345" />
      <book name="america" id="67890" />
    </products>
    eoxml
  end

  def test_single_node_with_content_as_hash
    assert_equal_rexml(<<-eoxml)
      <products>
        hello world
      </products>
    eoxml
  end

  def test_children_with_children
    assert_equal_rexml(<<-eoxml)
    <root>
      <products>
        <book name="america" id="67890" />
      </products>
    </root>
    eoxml
  end

  def test_children_with_text
    assert_equal_rexml(<<-eoxml)
    <root>
      <products>
        hello everyone
      </products>
    </root>
    eoxml
  end

  def test_children_with_non_adjacent_text
    assert_equal_rexml(<<-eoxml)
    <root>
      good
      <products>
        hello everyone
      </products>
      morning
    </root>
    eoxml
  end

  def test_parse_from_io
    io = StringIO.new(<<-eoxml)
    <root>
      good
      <products>
        hello everyone
      </products>
      morning
    </root>
    eoxml
    assert_equal_rexml(io)
  end

  def test_children_with_simple_cdata
    assert_equal_rexml(<<-eoxml)
    <root>
      <products>
         <![CDATA[cdatablock]]>
      </products>
    </root>
    eoxml
  end

  def test_children_with_multiple_cdata
    assert_equal_rexml(<<-eoxml)
    <root>
      <products>
         <![CDATA[cdatablock1]]><![CDATA[cdatablock2]]>
      </products>
    </root>
    eoxml
  end

  def test_children_with_text_and_cdata
    assert_equal_rexml(<<-eoxml)
    <root>
      <products>
        hello <![CDATA[cdatablock]]>
        morning
      </products>
    </root>
    eoxml
  end

  def test_children_with_blank_text
    assert_equal_rexml(<<-eoxml)
    <root>
      <products>   </products>
    </root>
    eoxml
  end

  def test_children_with_blank_text_and_attribute
    assert_equal_rexml(<<-eoxml)
    <root>
      <products type="file">   </products>
    </root>
    eoxml
  end


  private
    def assert_equal_rexml(xml)
      parsed_xml = XmlMini.parse(xml)
      xml.rewind if xml.respond_to?(:rewind)
      hash = XmlMini.with_backend('REXML') { XmlMini.parse(xml) }
      assert_equal(hash, parsed_xml)
    end
end

end
