JezK
Edit File: test_xpath.rb
require "helper" module Nokogiri module XML class TestXPath < Nokogiri::TestCase # ** WHY ALL THOSE _if Nokogiri.uses_libxml?_ ** # Hi, my dear readers, # # After reading these tests you may be wondering why all those ugly # if Nokogiri.uses_libxml? sparsed over the whole document. Well, let # me explain it. While using XPath in Java, you need the extension # functions to be in a namespace. This is not required by XPath, afaik, # but it is an usual convention though. # # Furthermore, CSS does not support extension functions but it does in # Nokogiri. Result: you cannot use them in JRuby impl. At least, until # the CSS to XPath parser is patched, and let me say that there are more # important features to add before that happens. I hope you will forgive # me. # # Yours truly, # # The guy whose headaches belong to Nokogiri JRuby impl. def setup super @xml = Nokogiri::XML.parse(File.read(XML_FILE), XML_FILE) @ns = @xml.root.namespaces # TODO: Maybe I should move this to the original code. @ns["nokogiri"] = "http://www.nokogiri.org/default_ns/ruby/extensions_functions" @handler = Class.new { attr_reader :things def initialize @things = [] end def thing thing @things << thing thing end def returns_array node_set @things << node_set.to_a node_set.to_a end def my_filter set, attribute, value set.find_all { |x| x[attribute] == value } end def saves_node_set node_set @things = node_set end }.new end def test_variable_binding assert_equal 4, @xml.xpath('//address[@domestic=$value]', nil, :value => 'Yes').length end def test_unknown_attribute assert_equal 0, @xml.xpath('//employee[@id="asdfasdf"]/@fooo').length assert_nil @xml.xpath('//employee[@id="asdfasdf"]/@fooo')[0] end def test_boolean assert_equal false, @xml.xpath('1 = 2') end def test_number assert_equal 2, @xml.xpath('1 + 1') end def test_string assert_equal 'foo', @xml.xpath('concat("fo", "o")') end def test_css_search_uses_custom_selectors_with_arguments set = if Nokogiri.uses_libxml? @xml.css('employee > address:my_filter("domestic", "Yes")', @handler) else @xml.xpath("//employee/address[nokogiri:my_filter(., \"domestic\", \"Yes\")]", @ns, @handler) end assert set.length > 0 set.each do |node| assert_equal 'Yes', node['domestic'] end end def test_css_search_uses_custom_selectors set = @xml.xpath('//employee') assert_nothing_raised do if Nokogiri.uses_libxml? @xml.css('employee:thing()', @handler) else @xml.xpath("//employee[nokogiri:thing(.)]", @ns, @handler) end end assert_equal(set.length, @handler.things.length) assert_equal(set.to_a, @handler.things.flatten) end def test_pass_self_to_function set = if Nokogiri.uses_libxml? @xml.xpath('//employee/address[my_filter(., "domestic", "Yes")]', @handler) else @xml.xpath('//employee/address[nokogiri:my_filter(., "domestic", "Yes")]', @ns, @handler) end assert set.length > 0 set.each do |node| assert_equal 'Yes', node['domestic'] end end def test_custom_xpath_function_gets_strings set = @xml.xpath('//employee') if Nokogiri.uses_libxml? @xml.xpath('//employee[thing("asdf")]', @handler) else @xml.xpath('//employee[nokogiri:thing("asdf")]', @ns, @handler) end assert_equal(set.length, @handler.things.length) assert_equal(['asdf'] * set.length, @handler.things) end def test_custom_xpath_gets_true_booleans set = @xml.xpath('//employee') if Nokogiri.uses_libxml? @xml.xpath('//employee[thing(true())]', @handler) else @xml.xpath("//employee[nokogiri:thing(true())]", @ns, @handler) end assert_equal(set.length, @handler.things.length) assert_equal([true] * set.length, @handler.things) end def test_custom_xpath_gets_false_booleans set = @xml.xpath('//employee') if Nokogiri.uses_libxml? @xml.xpath('//employee[thing(false())]', @handler) else @xml.xpath("//employee[nokogiri:thing(false())]", @ns, @handler) end assert_equal(set.length, @handler.things.length) assert_equal([false] * set.length, @handler.things) end def test_custom_xpath_gets_numbers set = @xml.xpath('//employee') if Nokogiri.uses_libxml? @xml.xpath('//employee[thing(10)]', @handler) else @xml.xpath('//employee[nokogiri:thing(10)]', @ns, @handler) end assert_equal(set.length, @handler.things.length) assert_equal([10] * set.length, @handler.things) end def test_custom_xpath_gets_node_sets set = @xml.xpath('//employee/name') if Nokogiri.uses_libxml? @xml.xpath('//employee[thing(name)]', @handler) else @xml.xpath('//employee[nokogiri:thing(name)]', @ns, @handler) end assert_equal(set.length, @handler.things.length) assert_equal(set.to_a, @handler.things.flatten) end def test_custom_xpath_gets_node_sets_and_returns_array set = @xml.xpath('//employee/name') if Nokogiri.uses_libxml? @xml.xpath('//employee[returns_array(name)]', @handler) else @xml.xpath('//employee[nokogiri:returns_array(name)]', @ns, @handler) end assert_equal(set.length, @handler.things.length) assert_equal(set.to_a, @handler.things.flatten) end def test_custom_xpath_handler_is_passed_a_decorated_node_set x = Module.new do def awesome! ; end end util_decorate(@xml, x) assert @xml.xpath('//employee/name') @xml.xpath('//employee[saves_node_set(name)]', @handler) assert_equal @xml, @handler.things.document assert @handler.things.respond_to?(:awesome!) end def test_code_that_invokes_OP_RESET_inside_libxml2 doc = "<html><body id='foo'><foo>hi</foo></body></html>" xpath = 'id("foo")//foo' nokogiri = Nokogiri::HTML.parse(doc) assert nokogiri.xpath(xpath) end def test_custom_xpath_handler_with_args_under_gc_pressure # see http://github.com/tenderlove/nokogiri/issues/#issue/345 tool_inspector = Class.new do def name_equals(nodeset, name, *args) nodeset.all? do |node| args.each { |thing| thing.inspect } node["name"] == name end end end.new xml = <<-EOXML <toolbox> #{"<tool name='hammer'/><tool name='wrench'/>" * 10} </toolbox> EOXML doc = Nokogiri::XML xml # long list of long arguments, to apply GC pressure during # ruby_funcall argument marshalling xpath = ["//tool[name_equals(.,'hammer'"] 1000.times { xpath << "'unused argument #{'x' * 1000}'" } xpath << "'unused argument')]" xpath = xpath.join(',') assert_equal doc.xpath("//tool[@name='hammer']"), doc.xpath(xpath, tool_inspector) end end end end