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require "test/unit/testcase"

require 'rexml/parsers/pullparser'

module REXMLTests
  class PullParserTester < Test::Unit::TestCase
    include REXML
    def test_basics
      source = '<?xml version="1.0"?>
      <!DOCTYPE blah>
      <a>foo &lt;<b attribute="value">bar</b> nooo</a>'
      parser = REXML::Parsers::PullParser.new(source)
      res = { :text=>0 }
      until parser.empty?
        results = parser.pull
        res[ :xmldecl ] = true if results.xmldecl?
        res[ :doctype ] = true if results.doctype?
        res[ :a ] = true if results.start_element? and results[0] == 'a'
        if results.start_element? and results[0] == 'b'
          res[ :b ] = true
          assert_equal 'value', results[1]['attribute']
        end
        res[ :text ] += 1 if results.text?
      end
      [ :xmldecl, :doctype, :a, :b ].each { |tag|
        assert res[tag] , "#{tag} wasn't processed"
      }
      assert_equal 4, res[ :text ]
    rescue ParseException
      puts $!
    end

    def test_bad_document
      source = "<a><b></a>"
      parser = REXML::Parsers::PullParser.new(source)
      assert_raise(ParseException, "Parsing should have failed") {
        parser.pull while parser.has_next?
      }
    end

    def test_entity_replacement
      source = '<!DOCTYPE foo [
      <!ENTITY la "1234">
      <!ENTITY lala "--&la;--">
      <!ENTITY lalal "&la;&la;">
      ]><a><la>&la;</la><lala>&lala;</lala></a>'
      pp = REXML::Parsers::PullParser.new( source )
      el_name = ''
      while pp.has_next?
        event = pp.pull
        case event.event_type
        when :start_element
          el_name = event[0]
        when :text
          case el_name
          when 'la'
            assert_equal('1234', event[1])
          when 'lala'
            assert_equal('--1234--', event[1])
          end
        end
      end
    end

    def test_peek_unshift
      source = "<a><b/></a>"
      REXML::Parsers::PullParser.new(source)
      # FINISH ME!
    end

    def test_inspect
      xml =  '<a id="1"><b id="2">Hey</b></a>'
      parser = Parsers::PullParser.new( xml )
      while parser.has_next?
        pull_event = parser.pull
        if pull_event.start_element?
          peek = parser.peek()
          peek.inspect
        end
      end
    end

    def test_peek
      xml =  '<a id="1"><b id="2">Hey</b></a>'
      parser = Parsers::PullParser.new( xml )
      names = %w{ a b }
      while parser.has_next?
        pull_event = parser.pull
        if pull_event.start_element?
          assert_equal( :start_element, pull_event.event_type )
          assert_equal( names.shift, pull_event[0] )
          if names[0] == 'b'
            peek = parser.peek()
            assert_equal( :start_element, peek.event_type )
            assert_equal( names[0], peek[0] )
          end
        end
      end
      assert_equal( 0, names.length )
    end
  end
end