require "helper"

require 'stringio'

module Nokogiri
  module XML
    class TestNode < Nokogiri::TestCase
      def setup
        super
        @xml = Nokogiri::XML(File.read(XML_FILE), XML_FILE)
      end

      def test_first_element_child
        node = @xml.root.first_element_child
        assert_equal 'employee', node.name
        assert node.element?, 'node is an element'
      end

      def test_element_children
        nodes = @xml.root.element_children
        assert_equal @xml.root.first_element_child, nodes.first
        assert nodes.all? { |node| node.element? }, 'all nodes are elements'
      end

      def test_last_element_child
        nodes = @xml.root.element_children
        assert_equal nodes.last, @xml.root.element_children.last
      end

      def test_bad_xpath
        bad_xpath = '//foo['

        begin
          @xml.xpath(bad_xpath)
        rescue Nokogiri::XML::XPath::SyntaxError => e
          assert_match(bad_xpath, e.to_s)
        end
      end

      def test_namespace_type_error
        assert_raises(TypeError) do
          @xml.root.namespace = Object.new
        end
      end

      def test_remove_namespace
        @xml = Nokogiri::XML('<r xmlns="v"><s /></r>')
        tag = @xml.at('s')
        assert tag.namespace
        tag.namespace = nil
        assert_nil tag.namespace
      end

      def test_parse_needs_doc
        list = @xml.root.parse('fooooooo <hello />')
        assert_equal 1, list.css('hello').length
      end

      def test_parse
        list = @xml.root.parse('fooooooo <hello />')
        assert_equal 2, list.length
      end

      def test_parse_with_block
        called = false
        list = @xml.root.parse('<hello />') { |cfg|
          called = true
          assert_instance_of Nokogiri::XML::ParseOptions, cfg
        }
        assert called, 'config block called'
        assert_equal 1, list.length
      end

      def test_parse_with_io
        list = @xml.root.parse(StringIO.new('<hello />'))
        assert_equal 1, list.length
        assert_equal 'hello', list.first.name
      end

      def test_parse_with_empty_string
        list = @xml.root.parse('')
        assert_equal 0, list.length
      end

      def test_parse_config_option
        node = @xml.root
        options = nil
        node.parse("<item></item>") do |config|
          options = config
        end
        assert_equal Nokogiri::XML::ParseOptions::DEFAULT_XML, options.to_i
      end

      # descriptive, not prescriptive.
      def test_parse_invalid_html_markup_results_in_empty_nodeset
        doc = Nokogiri::HTML("<html></html>")
        nodeset = doc.root.parse "<div><div>a</div><snippet>b</snippet></div>"
        assert_equal 1, doc.errors.length # "Tag snippet invalid"
        assert_equal 1, nodeset.length
      end

      def test_node_context_parsing_of_malformed_html_fragment_with_recover_is_corrected
        doc = HTML.parse "<html><body><div></div></body></html>"
        context_node = doc.at_css "div"
        nodeset = context_node.parse("<div </div>") do |options|
          options.recover
        end
        assert_equal "<div></div>", nodeset.to_s
        assert_equal 1, doc.errors.length
        assert_equal 1, nodeset.length
      end

      def test_node_context_parsing_of_malformed_html_fragment_without_recover_is_not_corrected
        doc = HTML.parse "<html><body><div></div></body></html>"
        context_node = doc.at_css "div"
        nodeset = context_node.parse("<div </div>") do |options|
          options.strict
        end
        assert_equal 1, doc.errors.length
        assert_equal 0, nodeset.length
      end

      def test_parse_error_list
        error_count = @xml.errors.length
        @xml.root.parse('<hello>')
        assert(error_count < @xml.errors.length, "errors should have increased")
      end
      
      def test_parse_error_on_fragment_with_empty_document
        doc = Document.new
        fragment = DocumentFragment.new(doc, '<foo><bar/></foo>')
        node = fragment%'bar'
        node.parse('<baz><</baz>')
      end

      def test_subclass_dup
        subclass = Class.new(Nokogiri::XML::Node)
        node = subclass.new('foo', @xml).dup
        assert_instance_of subclass, node
      end

      def test_gt_string_arg
        node = @xml.at('employee')
        nodes = (node > 'name')
        assert_equal 1, nodes.length
        assert_equal node, nodes.first.parent
      end

      def test_next_element_when_next_sibling_is_element_should_return_next_sibling
        doc = Nokogiri::XML "<root><foo /><quux /></root>"
        node         = doc.at_css("foo")
        next_element = node.next_element
        assert next_element.element?
        assert_equal doc.at_css("quux"), next_element
      end

      def test_next_element_when_there_is_no_next_sibling_should_return_nil
        doc = Nokogiri::XML "<root><foo /><quux /></root>"
        assert_nil doc.at_css("quux").next_element
      end

      def test_next_element_when_next_sibling_is_not_an_element_should_return_closest_next_element_sibling
        doc = Nokogiri::XML "<root><foo />bar<quux /></root>"
        node         = doc.at_css("foo")
        next_element = node.next_element
        assert next_element.element?
        assert_equal doc.at_css("quux"), next_element
      end

      def test_next_element_when_next_sibling_is_not_an_element_and_no_following_element_should_return_nil
        doc = Nokogiri::XML "<root><foo />bar</root>"
        node         = doc.at_css("foo")
        next_element = node.next_element
        assert_nil next_element
      end

      def test_previous_element_when_previous_sibling_is_element_should_return_previous_sibling
        doc = Nokogiri::XML "<root><foo /><quux /></root>"
        node             = doc.at_css("quux")
        previous_element = node.previous_element
        assert previous_element.element?
        assert_equal doc.at_css("foo"), previous_element
      end

      def test_previous_element_when_there_is_no_previous_sibling_should_return_nil
        doc = Nokogiri::XML "<root><foo /><quux /></root>"
        assert_nil doc.at_css("foo").previous_element
      end

      def test_previous_element_when_previous_sibling_is_not_an_element_should_return_closest_previous_element_sibling
        doc = Nokogiri::XML "<root><foo />bar<quux /></root>"
        node             = doc.at_css("quux")
        previous_element = node.previous_element
        assert previous_element.element?
        assert_equal doc.at_css("foo"), previous_element
      end

      def test_previous_element_when_previous_sibling_is_not_an_element_and_no_following_element_should_return_nil
        doc = Nokogiri::XML "<root>foo<bar /></root>"
        node             = doc.at_css("bar")
        previous_element = node.previous_element
        assert_nil previous_element
      end

      def test_element?
        assert @xml.root.element?, 'is an element'
      end

      def test_slash_search
        assert_equal 'EMP0001', (@xml/:staff/:employee/:employeeId).first.text
      end

      def test_append_with_document
        assert_raises(ArgumentError) do
          @xml.root << Nokogiri::XML::Document.new
        end
      end

      def test_append_with_attr
        r = Nokogiri.XML('<r a="1" />').root
        assert_raises(ArgumentError) do
          r << r.at_xpath('@a')
        end
      end

      def test_inspect_ns
        xml = Nokogiri::XML(<<-eoxml) { |c| c.noblanks }
          <root xmlns="http://tenderlovemaking.com/" xmlns:foo="bar">
            <awesome/>
          </root>
        eoxml
        ins = xml.inspect

        xml.traverse do |node|
          assert_match node.class.name, ins
          if node.respond_to? :attributes
            node.attributes.each do |k,v|
              assert_match k, ins
              assert_match v, ins
            end
          end

          if node.respond_to?(:namespace) && node.namespace
            assert_match node.namespace.class.name, ins
            assert_match node.namespace.href, ins
          end
        end
      end

      def test_namespace_definitions_when_some_exist
        xml = Nokogiri::XML <<-eoxml
          <root xmlns="http://tenderlovemaking.com/" xmlns:foo="bar">
            <awesome/>
          </root>
        eoxml
        namespace_definitions = xml.root.namespace_definitions
        assert_equal 2, namespace_definitions.length
      end

      def test_namespace_definitions_when_no_exist
        xml = Nokogiri::XML <<-eoxml
          <root xmlns="http://tenderlovemaking.com/" xmlns:foo="bar">
            <awesome/>
          </root>
        eoxml
        namespace_definitions = xml.at_xpath('//xmlns:awesome').namespace_definitions
        assert_equal 0, namespace_definitions.length
      end

      def test_namespace_goes_to_children
        fruits = Nokogiri::XML(<<-eoxml)
        <Fruit xmlns='www.fruits.org'>
        </Fruit>
        eoxml
        apple = Nokogiri::XML::Node.new('Apple', fruits)
        orange = Nokogiri::XML::Node.new('Orange', fruits)
        apple << orange
        fruits.root << apple
        assert fruits.at('//fruit:Orange',{'fruit'=>'www.fruits.org'})
        assert fruits.at('//fruit:Apple',{'fruit'=>'www.fruits.org'})
      end

      def test_description
        assert_nil @xml.at('employee').description
      end

      def test_spaceship
        nodes = @xml.xpath('//employee')
        assert_equal(-1, (nodes.first <=> nodes.last))
        list = [nodes.first, nodes.last].sort
        assert_equal nodes.first, list.first
        assert_equal nodes.last, list.last
      end

      def test_incorrect_spaceship
        nodes = @xml.xpath('//employee')
        assert_nil(nodes.first <=> 'asdf')
      end

      def test_document_compare
        nodes = @xml.xpath('//employee')
        assert_equal(-1, (nodes.first <=> @xml))
      end

      def test_different_document_compare
        nodes = @xml.xpath('//employee')
        doc = Nokogiri::XML('<a><b/></a>')
        b = doc.at('b')
        assert_nil(nodes.first <=> b)
      end

      def test_duplicate_node_removes_namespace
        fruits = Nokogiri::XML(<<-eoxml)
        <Fruit xmlns='www.fruits.org'>
        <Apple></Apple>
        </Fruit>
        eoxml
        apple = fruits.root.xpath('fruit:Apple', {'fruit'=>'www.fruits.org'})[0]
        new_apple = apple.dup
        fruits.root << new_apple
        assert_equal 2, fruits.xpath('//xmlns:Apple').length
        assert_equal 1, fruits.to_xml.scan('www.fruits.org').length
      end

      [:clone, :dup].each do |symbol|
        define_method "test_#{symbol}" do
          node = @xml.at('//employee')
          other = node.send(symbol)
          assert_equal "employee", other.name
          assert_nil other.parent
        end
      end

      def test_fragment_creates_elements
        apple = @xml.fragment('<Apple/>')
        apple.children.each do |child|
          assert_equal Nokogiri::XML::Node::ELEMENT_NODE, child.type
          assert_instance_of Nokogiri::XML::Element, child
        end
      end

      def test_node_added_to_root_should_get_namespace
        fruits = Nokogiri::XML(<<-eoxml)
          <Fruit xmlns='http://www.fruits.org'>
          </Fruit>
        eoxml
        apple = fruits.fragment('<Apple/>')
        fruits.root << apple
        assert_equal 1, fruits.xpath('//xmlns:Apple').length
      end

      def test_new_node_can_have_ancestors
        xml = Nokogiri::XML('<root>text</root>')
        item = Nokogiri::XML::Element.new('item', xml)
        assert_equal 0, item.ancestors.length
      end

      def test_children
        doc = Nokogiri::XML(<<-eoxml)
          <root>#{'<a/>' * 9 }</root>
        eoxml
        assert_equal 9, doc.root.children.length
        assert_equal 9, doc.root.children.to_a.length

        doc = Nokogiri::XML(<<-eoxml)
          <root>#{'<a/>' * 15 }</root>
        eoxml
        assert_equal 15, doc.root.children.length
        assert_equal 15, doc.root.children.to_a.length
      end

      def test_add_namespace
        node = @xml.at('address')
        node.add_namespace('foo', 'http://tenderlovemaking.com')
        assert_equal 'http://tenderlovemaking.com', node.namespaces['xmlns:foo']
      end

      def test_add_namespace_twice
        node = @xml.at('address')
        ns = node.add_namespace('foo', 'http://tenderlovemaking.com')
        ns2 = node.add_namespace('foo', 'http://tenderlovemaking.com')
        assert_equal ns, ns2
      end

      def test_add_default_ns
        node = @xml.at('address')
        node.add_namespace(nil, 'http://tenderlovemaking.com')
        assert_equal 'http://tenderlovemaking.com', node.namespaces['xmlns']
      end

      def test_add_multiple_namespaces
        node = @xml.at('address')

        node.add_namespace(nil, 'http://tenderlovemaking.com')
        assert_equal 'http://tenderlovemaking.com', node.namespaces['xmlns']

        node.add_namespace('foo', 'http://tenderlovemaking.com')
        assert_equal 'http://tenderlovemaking.com', node.namespaces['xmlns:foo']
      end

      def test_default_namespace=
        node = @xml.at('address')
        node.default_namespace = 'http://tenderlovemaking.com'
        assert_equal 'http://tenderlovemaking.com', node.namespaces['xmlns']
      end

      def test_namespace=
        node = @xml.at('address')
        assert_nil node.namespace
        definition = node.add_namespace_definition 'bar', 'http://tlm.com/'

        node.namespace = definition

        assert_equal definition, node.namespace

        assert_equal node, @xml.at('//foo:address', {
          'foo' => 'http://tlm.com/'
        })
      end

      def test_add_namespace_with_nil_associates_node
        node = @xml.at('address')
        assert_nil node.namespace
        definition = node.add_namespace_definition nil, 'http://tlm.com/'
        assert_equal definition, node.namespace
      end

      def test_add_namespace_does_not_associate_node
        node = @xml.at('address')
        assert_nil node.namespace
        assert node.add_namespace_definition 'foo', 'http://tlm.com/'
        assert_nil node.namespace
      end

      def test_set_namespace_from_different_doc
        node = @xml.at('address')
        doc = Nokogiri::XML(File.read(XML_FILE), XML_FILE)
        decl = doc.root.add_namespace_definition 'foo', 'bar'

        assert_raises(ArgumentError) do
          node.namespace = decl
        end
      end

      def test_set_namespace_must_only_take_a_namespace
        node = @xml.at('address')
        assert_raises(TypeError) do
          node.namespace = node
        end
      end

      def test_at
        node = @xml.at('address')
        assert_equal node, @xml.xpath('//address').first
      end

      def test_at_self
        node = @xml.at('address')
        assert_equal node, node.at('.')
      end

      def test_at_xpath
        node = @xml.at_xpath('//address')
        nodes = @xml.xpath('//address')
        assert_equal 5, nodes.size
        assert_equal node, nodes.first
      end

      def test_at_css
        node = @xml.at_css('address')
        nodes = @xml.css('address')
        assert_equal 5, nodes.size
        assert_equal node, nodes.first
      end

      def test_percent
        node = @xml % ('address')
        assert_equal node, @xml.xpath('//address').first
      end

      def test_accept
        visitor = Class.new {
          attr_accessor :visited
          def accept target
            target.accept(self)
          end

          def visit node
            node.children.each { |c| c.accept(self) }
            @visited = true
          end
        }.new
        visitor.accept(@xml.root)
        assert visitor.visited
      end

      def test_write_to
        io = StringIO.new
        @xml.write_to io
        io.rewind
        assert_equal @xml.to_xml, io.read
      end

      def test_attribute_with_symbol
        assert_equal 'Yes', @xml.css('address').first[:domestic]
      end

      def test_non_existent_attribute_should_return_nil
        node = @xml.root.first_element_child
        assert_nil node.attribute('type')
      end

      def test_write_to_with_block
        called = false
        io = StringIO.new
        conf = nil
        @xml.write_to io do |config|
          called = true
          conf = config
          config.format.as_html.no_empty_tags
        end
        io.rewind
        assert called
        string = io.read
        assert_equal @xml.serialize(nil, conf.options), string
        assert_equal @xml.serialize(nil, conf), string
      end

      %w{ xml html xhtml }.each do |type|
        define_method(:"test_write_#{type}_to") do
          io = StringIO.new
          assert @xml.send(:"write_#{type}_to", io)
          io.rewind
          assert_match @xml.send(:"to_#{type}"), io.read
        end
      end

      def test_serialize_with_block
        called = false
        conf = nil
        string = @xml.serialize do |config|
          called = true
          conf = config
          config.format.as_html.no_empty_tags
        end
        assert called
        assert_equal @xml.serialize(nil, conf.options), string
        assert_equal @xml.serialize(nil, conf), string
      end

      def test_hold_refence_to_subnode
        doc = Nokogiri::XML(<<-eoxml)
          <root>
            <a>
              <b />
            </a>
          </root>
        eoxml
        assert node_a = doc.css('a').first
        assert node_b = node_a.css('b').first
        node_a.unlink
        assert_equal 'b', node_b.name
      end

      def test_values
        assert_equal %w{ Yes Yes }, @xml.xpath('//address')[1].values
      end

      def test_keys
        assert_equal %w{ domestic street }, @xml.xpath('//address')[1].keys
      end

      def test_each
        attributes = []
        @xml.xpath('//address')[1].each do |key, value|
          attributes << [key, value]
        end
        assert_equal [['domestic', 'Yes'], ['street', 'Yes']], attributes
      end

      def test_new
        assert node = Nokogiri::XML::Node.new('input', @xml)
        assert_equal 1, node.node_type
        assert_instance_of Nokogiri::XML::Element, node
      end

      def test_to_str
        name = @xml.xpath('//name').first
        assert_match(/Margaret/, '' + name)
        assert_equal('Margaret Martin', '' + name.children.first)
      end

      def test_ancestors
        address = @xml.xpath('//address').first
        assert_equal 3, address.ancestors.length
        assert_equal ['employee', 'staff', 'document'],
          address.ancestors.map { |x| x.name }
      end

      def test_read_only?
        assert entity_decl = @xml.internal_subset.children.find { |x|
          x.type == Node::ENTITY_DECL
        }
        assert entity_decl.read_only?
      end

      def test_remove_attribute
        address = @xml.xpath('/staff/employee/address').first
        assert_equal 'Yes', address['domestic']
        address.remove_attribute 'domestic'
        assert_nil address['domestic']
      end

      def test_attribute_setter_accepts_non_string
        address = @xml.xpath("/staff/employee/address").first
        assert_equal "Yes", address[:domestic]
        address[:domestic] = "Altered Yes"
        assert_equal "Altered Yes", address[:domestic]
      end

      def test_attribute_accessor_accepts_non_string
        address = @xml.xpath("/staff/employee/address").first
        assert_equal "Yes", address["domestic"]
        assert_equal "Yes", address[:domestic]
      end

      def test_empty_attribute_reading
        node = Nokogiri::XML '<foo empty="" whitespace="  "/>'

        assert_equal '', node.root['empty']
        assert_equal '  ', node.root['whitespace']
      end

      def test_delete
        address = @xml.xpath('/staff/employee/address').first
        assert_equal 'Yes', address['domestic']
        address.delete 'domestic'
        assert_nil address['domestic']
      end

      def test_set_content_with_symbol
        node = @xml.at('//name')
        node.content = :foo
        assert_equal 'foo', node.content
      end

      def test_set_native_content_is_unescaped
        comment = Nokogiri.XML('<r><!-- foo --></r>').at('//comment()')

        comment.native_content = " < " # content= will escape this string
        assert_equal "<!-- < -->", comment.to_xml
      end

      def test_find_by_css_class_with_nonstandard_whitespace
        doc = Nokogiri::HTML '
<html>
  <body>
    <div class="a 
b"></div>
  </body>
</html>
'
        assert_not_nil doc.at_css(".b")
      end

      def test_find_by_css_with_tilde_eql
        xml = Nokogiri::XML.parse(<<-eoxml)
        <root>
          <a>Hello world</a>
          <a class='foo bar'>Bar</a>
          <a class='bar foo'>Bar</a>
          <a class='bar'>Bar</a>
          <a class='baz bar foo'>Bar</a>
          <a class='bazbarfoo'>Awesome</a>
          <a class='bazbar'>Awesome</a>
        </root>
        eoxml
        set = xml.css('a[@class~="bar"]')
        assert_equal 4, set.length
        assert_equal ['Bar'], set.map { |node| node.content }.uniq
      end

      def test_unlink
        xml = Nokogiri::XML.parse(<<-eoxml)
        <root>
          <a class='foo bar'>Bar</a>
          <a class='bar foo'>Bar</a>
          <a class='bar'>Bar</a>
          <a>Hello world</a>
          <a class='baz bar foo'>Bar</a>
          <a class='bazbarfoo'>Awesome</a>
          <a class='bazbar'>Awesome</a>
        </root>
        eoxml
        node = xml.xpath('//a')[3]
        assert_equal('Hello world', node.text)
        assert_match(/Hello world/, xml.to_s)
        assert node.parent
        assert node.document
        assert node.previous_sibling
        assert node.next_sibling
        node.unlink
        assert !node.parent
        #assert !node.document
        assert !node.previous_sibling
        assert !node.next_sibling
        assert_no_match(/Hello world/, xml.to_s)
      end

      def test_next_sibling
        assert node = @xml.root
        assert sibling = node.child.next_sibling
        assert_equal('employee', sibling.name)
      end

      def test_previous_sibling
        assert node = @xml.root
        assert sibling = node.child.next_sibling
        assert_equal('employee', sibling.name)
        assert_equal(sibling.previous_sibling, node.child)
      end

      def test_name=
        assert node = @xml.root
        node.name = 'awesome'
        assert_equal('awesome', node.name)
      end

      def test_child
        assert node = @xml.root
        assert child = node.child
        assert_equal('text', child.name)
      end

      def test_key?
        assert node = @xml.search('//address').first
        assert(!node.key?('asdfasdf'))
      end

      def test_set_property
        assert node = @xml.search('//address').first
        node['foo'] = 'bar'
        assert_equal('bar', node['foo'])
      end

      def test_set_property_non_string
        assert node = @xml.search('//address').first
        node['foo'] = 1
        assert_equal('1', node['foo'])
        node['foo'] = false
        assert_equal('false', node['foo'])
      end

      def test_attributes
        assert node = @xml.search('//address').first
        assert_nil(node['asdfasdfasdf'])
        assert_equal('Yes', node['domestic'])

        assert node = @xml.search('//address')[2]
        attr = node.attributes
        assert_equal 2, attr.size
        assert_equal 'Yes', attr['domestic'].value
        assert_equal 'Yes', attr['domestic'].to_s
        assert_equal 'No', attr['street'].value
      end

      def test_path
        assert set = @xml.search('//employee')
        assert node = set.first
        assert_equal('/staff/employee[1]', node.path)
      end

      def test_parent_xpath
        assert set = @xml.search('//employee')
        assert node = set.first
        assert parent_set = node.search('..')
        assert parent_node = parent_set.first
        assert_equal '/staff', parent_node.path
        assert_equal node.parent, parent_node
      end

      def test_search_self
        node = @xml.at('//employee')
        assert_equal node.search('.').to_a, [node]
      end

      def test_search_by_symbol
        assert set = @xml.search(:employee)
        assert 5, set.length

        assert node = @xml.at(:employee)
        assert node.text =~ /EMP0001/
      end

      def test_new_node
        node = Nokogiri::XML::Node.new('form', @xml)
        assert_equal('form', node.name)
        assert(node.document)
      end

      def test_encode_special_chars
        foo = @xml.css('employee').first.encode_special_chars('&')
        assert_equal '&amp;', foo
      end

      def test_content_equals
        node = Nokogiri::XML::Node.new('form', @xml)
        assert_equal('', node.content)

        node.content = 'hello world!'
        assert_equal('hello world!', node.content)

        node.content = '& <foo> &amp;'
        assert_equal('& <foo> &amp;', node.content)
        assert_equal('<form>&amp; &lt;foo&gt; &amp;amp;</form>', node.to_xml)

        node.content = "1234 <-> 1234"
        assert_equal "1234 <-> 1234", node.content
        assert_equal "<form>1234 &lt;-&gt; 1234</form>", node.to_xml

        node.content = '1234'
        node.add_child '<foo>5678</foo>'
        assert_equal '12345678', node.content
      end

      # issue #839
      def test_encoding_of_copied_nodes
        d1 = Nokogiri::XML('<r><a>&amp;</a></r>')
        d2 = Nokogiri::XML('<r></r>')
        ne = d1.root.xpath('//a').first.dup(1)
        ne.content += "& < & > \" &"
        d2.root << ne
        assert_match /<a>&amp;&amp; &lt; &amp; &gt; " &amp;<\/a>/, d2.to_s
      end

      def test_content_after_appending_text
        doc = Nokogiri::XML '<foo />'
        node = doc.children.first
        node.content = 'bar'
        node << 'baz'
        assert_equal 'barbaz', node.content
      end

      def test_content_depth_first
        node = Nokogiri::XML '<foo>first<baz>second</baz>third</foo>'
        assert_equal 'firstsecondthird', node.content
      end

      def test_set_content_should_unlink_existing_content
        node     = @xml.at_css("employee")
        children = node.children
        node.content = "hello"
        children.each { |child| assert_nil child.parent }
      end

      def test_whitespace_nodes
        doc = Nokogiri::XML.parse("<root><b>Foo</b>\n<i>Bar</i> <p>Bazz</p></root>")
        children = doc.at('//root').children.collect{|j| j.to_s}
        assert_equal "\n", children[1]
        assert_equal " ", children[3]
      end

      def test_node_equality
        doc1 = Nokogiri::XML.parse(File.read(XML_FILE), XML_FILE)
        doc2 = Nokogiri::XML.parse(File.read(XML_FILE), XML_FILE)

        address1_1 = doc1.xpath('//address').first
        address1_2 = doc1.xpath('//address').first

        address2 = doc2.xpath('//address').first

        assert_not_equal address1_1, address2 # two references to very, very similar nodes
        assert_equal address1_1, address1_2 # two references to the exact same node
      end

      def test_namespace_search_with_xpath_and_hash
        xml = Nokogiri::XML.parse(<<-eoxml)
        <root>
          <car xmlns:part="http://general-motors.com/">
            <part:tire>Michelin Model XGV</part:tire>
          </car>
          <bicycle xmlns:part="http://schwinn.com/">
            <part:tire>I'm a bicycle tire!</part:tire>
          </bicycle>
        </root>
        eoxml

        tires = xml.xpath('//bike:tire', {'bike' => 'http://schwinn.com/'})
        assert_equal 1, tires.length
      end

      def test_namespace_search_with_xpath_and_hash_with_symbol_keys
        xml = Nokogiri::XML.parse(<<-eoxml)
        <root>
          <car xmlns:part="http://general-motors.com/">
            <part:tire>Michelin Model XGV</part:tire>
          </car>
          <bicycle xmlns:part="http://schwinn.com/">
            <part:tire>I'm a bicycle tire!</part:tire>
          </bicycle>
        </root>
        eoxml

        tires = xml.xpath('//bike:tire', :bike => 'http://schwinn.com/')
        assert_equal 1, tires.length
      end

      def test_namespace_search_with_css
        xml = Nokogiri::XML.parse(<<-eoxml)
        <root>
          <car xmlns:part="http://general-motors.com/">
            <part:tire>Michelin Model XGV</part:tire>
          </car>
          <bicycle xmlns:part="http://schwinn.com/">
            <part:tire>I'm a bicycle tire!</part:tire>
          </bicycle>
        </root>
        eoxml

        tires = xml.css('bike|tire', 'bike' => 'http://schwinn.com/' )
        assert_equal 1, tires.length
      end

      def test_namespaced_attribute_search_with_xpath
        # from #593
        xmlContent = <<-EOXML
<?xml version="1.0"?>
<ns1:el1 xmlns:ns1="http://blabla.com" >
  <ns1:el2 ns1:att="123">with namespace</ns1:el2 >
  <ns1:el2 att="noNameSpace">no namespace</ns1:el2 >
</ns1:el1>
EOXML
        xml_doc = Nokogiri::XML(xmlContent)

        no_ns = xml_doc.xpath("//*[@att]")
        assert_equal no_ns.length, 1
        assert_equal no_ns.first.content, "no namespace"

        with_ns = xml_doc.xpath("//*[@ns1:att]")
        assert_equal with_ns.length, 1
        assert_equal with_ns.first.content, "with namespace"
      end

      def test_namespaced_attribute_search_with_css
        # from #593
        xmlContent = <<-EOXML
<?xml version="1.0"?>
<ns1:el1 xmlns:ns1="http://blabla.com" >
  <ns1:el2 ns1:att="123">with namespace</ns1:el2 >
  <ns1:el2 att="noNameSpace">no namespace</ns1:el2 >
</ns1:el1>
EOXML
        xml_doc = Nokogiri::XML(xmlContent)

        no_ns = xml_doc.css('*[att]')
        assert_equal no_ns.length, 1
        assert_equal no_ns.first.content, "no namespace"

        with_ns = xml_doc.css('*[ns1|att]')
        assert_equal with_ns.length, 1
        assert_equal with_ns.first.content, "with namespace"
      end

      def test_namespaces_should_include_all_namespace_definitions
        xml = Nokogiri::XML.parse(<<-EOF)
        <x xmlns="http://quux.com/" xmlns:a="http://foo.com/" xmlns:b="http://bar.com/">
          <y xmlns:c="http://bazz.com/">
            <z>hello</z>
            <a xmlns:c="http://newc.com/" />
          </y>
        </x>
        EOF

        namespaces = xml.namespaces # Document#namespace
        assert_equal({"xmlns"   => "http://quux.com/",
                      "xmlns:a" => "http://foo.com/",
                      "xmlns:b" => "http://bar.com/"}, namespaces)

        namespaces = xml.root.namespaces
        assert_equal({"xmlns"   => "http://quux.com/",
                      "xmlns:a" => "http://foo.com/",
                      "xmlns:b" => "http://bar.com/"}, namespaces)

        namespaces = xml.at_xpath("//xmlns:y").namespaces
        assert_equal({"xmlns"   => "http://quux.com/",
                      "xmlns:a" => "http://foo.com/",
                      "xmlns:b" => "http://bar.com/",
                      "xmlns:c" => "http://bazz.com/"}, namespaces)

        namespaces = xml.at_xpath("//xmlns:z").namespaces
        assert_equal({"xmlns"   => "http://quux.com/",
                      "xmlns:a" => "http://foo.com/",
                      "xmlns:b" => "http://bar.com/",
                      "xmlns:c" => "http://bazz.com/"}, namespaces)

        namespaces = xml.at_xpath("//xmlns:a").namespaces
        assert_equal({"xmlns"   => "http://quux.com/",
                      "xmlns:a" => "http://foo.com/",
                      "xmlns:b" => "http://bar.com/",
                      "xmlns:c" => "http://newc.com/"}, namespaces)
      end

      def test_namespace
        xml = Nokogiri::XML.parse(<<-EOF)
        <x xmlns:a='http://foo.com/' xmlns:b='http://bar.com/'>
          <y xmlns:c='http://bazz.com/'>
            <a:div>hello a</a:div>
            <b:div>hello b</b:div>
            <c:div>hello c</c:div>
            <div>hello moon</div>
          </y>
        </x>
        EOF
        set = xml.search("//y/*")
        assert_equal "a", set[0].namespace.prefix
        assert_equal "b", set[1].namespace.prefix
        assert_equal "c", set[2].namespace.prefix
        assert_equal nil, set[3].namespace
      end

      if Nokogiri.uses_libxml?
        def test_namespace_without_an_href_on_html_node
          # because microsoft word's HTML formatting does this. ick.
          xml = Nokogiri::HTML.parse <<-EOF
            <div><o:p>foo</o:p></div>
          EOF

          assert_not_nil(node = xml.at('p'))

          assert_equal 1, node.namespaces.keys.size
          assert       node.namespaces.has_key?('xmlns:o')
          assert_equal nil, node.namespaces['xmlns:o']
        end
      end

      def test_line
        xml = Nokogiri::XML(<<-eoxml)
        <root>
          <a>
            Hello world
          </a>
        </root>
        eoxml

        set = xml.search("//a")
        node = set.first
        assert_equal 2, node.line
      end

      def test_xpath_results_have_document_and_are_decorated
        x = Module.new do
          def awesome! ; end
        end
        util_decorate(@xml, x)
        node_set = @xml.xpath("//employee")
        assert_equal @xml, node_set.document
        assert node_set.respond_to?(:awesome!)
      end

      def test_css_results_have_document_and_are_decorated
        x = Module.new do
          def awesome! ; end
        end
        util_decorate(@xml, x)
        node_set = @xml.css("employee")
        assert_equal @xml, node_set.document
        assert node_set.respond_to?(:awesome!)
      end

      def test_blank
        doc = Nokogiri::XML('')
        assert_equal false, doc.blank?
      end

      def test_to_xml_allows_to_serialize_with_as_xml_save_option
        xml = Nokogiri::XML("<root><ul><li>Hello world</li></ul></root>")
        set = xml.search("//ul")
        node = set.first

        assert_no_match("<ul>\n  <li>", xml.to_xml(:save_with => XML::Node::SaveOptions::AS_XML))
        assert_no_match("<ul>\n  <li>", node.to_xml(:save_with => XML::Node::SaveOptions::AS_XML))
      end

      # issue 647
      def test_default_namespace_should_be_created
        subject = Nokogiri::XML.parse('<foo xml:bar="http://bar.com"/>').root
        ns = subject.attributes['bar'].namespace
        assert_not_nil ns
        assert_equal ns.class, Nokogiri::XML::Namespace
        assert_equal 'xml', ns.prefix
        assert_equal "http://www.w3.org/XML/1998/namespace", ns.href
      end

      # issue 648
      def test_namespace_without_prefix_should_be_set
        node = Nokogiri::XML.parse('<foo xmlns="http://bar.com"/>').root
        subject = Nokogiri::XML::Node.new 'foo', node.document
        subject.namespace = node.namespace
        ns = subject.namespace
        assert_equal ns.class, Nokogiri::XML::Namespace
        assert_nil ns.prefix
        assert_equal ns.href, "http://bar.com"
      end

      # issue 695
      def test_namespace_in_rendered_xml
        document = Nokogiri::XML::Document.new
        subject = Nokogiri::XML::Node.new 'foo', document
        ns = subject.add_namespace nil, 'bar'
        subject.namespace = ns
        assert_match(/xmlns="bar"/, subject.to_xml)
      end

      # issue 771
      def test_format_noblank
        content = <<eoxml
<foo>
  <bar>hello</bar>
</foo>
eoxml
        subject = Nokogiri::XML(content) do |conf|
          conf.default_xml.noblanks
        end

        assert_match %r{<bar>hello</bar>}, subject.to_xml(:indent => 2)
      end

      def test_text_node_colon
        document = Nokogiri::XML::Document.new
        root = Nokogiri::XML::Node.new 'foo', document
        document.root = root
        root << "<a>hello:with_colon</a>"
        assert_match(/hello:with_colon/, document.to_xml)
      end
    end
  end
end
