# coding: utf-8
# frozen_string_literal: false

require 'rexml/source'
require 'rexml/document'

module REXMLTests
  class EncodingTester < Test::Unit::TestCase
    include Helper::Fixture
    include Helper::Global
    include REXML

    def setup
      @encoded_root = "<a><b>\346</b></a>"
      @encoded = "<?xml version='1.0' encoding='ISO-8859-3'?>"+
        @encoded_root
      @not_encoded = "<a><b>ĉ</b></a>"
    end

    # Given an encoded document, try to write out to that encoding
    def test_encoded_in_encoded_out
      doc = Document.new( @encoded )
      doc.write( out="" )
      out.force_encoding(::Encoding::ASCII_8BIT)
      assert_equal( @encoded.b, out )
    end

    # Given an encoded document, try to change the encoding and write it out
    def test_encoded_in_change_out
      doc = Document.new( @encoded )
      doc.xml_decl.encoding = "UTF-8"
      assert_equal("UTF-8", doc.encoding)
      REXML::Formatters::Default.new.write( doc.root, out="" )
      out.force_encoding(::Encoding::ASCII_8BIT)
      assert_equal( @not_encoded.b, out )
      char = XPath.first( doc, "/a/b/text()" ).to_s
      char.force_encoding(::Encoding::ASCII_8BIT)
      assert_equal( "ĉ".b, char )
    end

    # * Given an encoded document, try to write it to a different encoding
    def test_encoded_in_different_out
      doc = Document.new( @encoded )
      REXML::Formatters::Default.new.write( doc.root, Output.new( out="", "UTF-8" ) )
      out.force_encoding(::Encoding::ASCII_8BIT)
      assert_equal( @not_encoded.b, out )
    end

    # * Given a non-encoded document, change the encoding
    def test_in_change_out
      doc = Document.new( @not_encoded )
      doc.xml_decl.encoding = "ISO-8859-3"
      assert_equal("ISO-8859-3", doc.encoding)
      doc.write( out="" )
      out.force_encoding(::Encoding::ASCII_8BIT)
      assert_equal( @encoded.b, out )
    end

    # * Given a non-encoded document, write to a different encoding
    def test_in_different_out
      doc = Document.new( @not_encoded )
      doc.write( Output.new( out="", "ISO-8859-3" ) )
      out.force_encoding(::Encoding::ASCII_8BIT)
      assert_equal( "<?xml version='1.0'?>#{@encoded_root}".b, out )
    end

    # * Given an encoded document, accessing text and attribute nodes
    #   should provide UTF-8 text.
    def test_in_different_access
      doc = Document.new <<~EOL
      <?xml version='1.0' encoding='ISO-8859-1'?>
      <a a="\xFF">\xFF</a>
      EOL
      expect = "\303\277"
      expect.force_encoding(::Encoding::UTF_8)
      assert_equal( expect, doc.elements['a'].attributes['a'] )
      assert_equal( expect, doc.elements['a'].text )
    end


    def test_ticket_89
      doc = Document.new <<~EOL
         <?xml version="1.0" encoding="CP-1252" ?>
         <xml><foo></foo></xml>
         EOL

      REXML::Document.new doc
    end

    def test_parse_utf16
      utf16 = File.open(fixture_path("utf16.xml")) do |f|
        REXML::Document.new(f)
      end
      assert_equal("UTF-16", utf16.encoding)
      assert( utf16[0].kind_of?(REXML::XMLDecl))
    end

    def test_parse_utf16_with_utf8_default_internal
      with_default_internal("UTF-8") do
        utf16 = File.open(fixture_path("utf16.xml")) do |f|
          REXML::Document.new(f)
        end
        assert_equal("UTF-16", utf16.encoding)
      end
    end
  end
end
