Class: Test::Unit::TestCase

Inherits:
Object
  • Object
show all
Defined in:
lib/assert_valid_markup.rb

Constant Summary collapse

@@default_avm_options = 
{
    :catalog_path => File.expand_path("~/.xml-catalogs"),
    :validation_service => system("xmllint --version > /dev/null 2>&1") ? :local : :w3c,
    :dtd_validate => true
}
@@skip_validation = 
false

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.assert_all_valid_markup ⇒ Object

Class-level method to to turn on validation for the response from any successful html request via “get”



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# File 'lib/assert_valid_markup.rb', line 62

def self.assert_all_valid_markup
  self.class_eval do
    # automatically check markup for all successfull GETs
    def get_with_assert_valid_markup(*args)
      get_without_assert_valid_markup(*args)
      assert_valid_markup if ! @@skip_validation && @request.format.html? && @response.success?
    end
    alias_method_chain :get, :assert_valid_markup
  end
end

.assert_valid_markup(*actions) ⇒ Object

Class-level method to quickly create validation tests for a bunch of actions at once. For example, if you have a FooController with three actions, just add one line to foo_controller_test.rb:

assert_valid_markup :bar, :baz, :qux

If you pass :but_first => :something, #something will be called at the beginning of each test case



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# File 'lib/assert_valid_markup.rb', line 48

def self.assert_valid_markup(*actions)
  options = actions.find { |i| i.kind_of? Hash }
  actions.delete_if { |i| i.kind_of? Hash }
  actions.each do |action|
    toeval = "def test_#{action}_valid_markup\n"
    toeval << "#{options[:but_first].id2name}\n" if options and options[:but_first]
    toeval << "get :#{action}\n"
    toeval << "assert_valid_markup\n"
    toeval << "end\n"
    class_eval toeval
  end
end

Instance Method Details

#assert_valid_markup(fragment = @response.body, options = {}) ⇒ Object

Assert that markup (html/xhtml) is valid according the W3C validator web service. By default, it validates the contents of @response.body, which is set after calling one of the get/post/etc helper methods. You can also pass it a string to be validated. Validation errors, if any, will be included in the output. The response from the validator service will be cached in the system temp directory to minimize duplicate calls.

For example, if you have a FooController with an action Bar, put this in foo_controller_test.rb:

def test_bar_valid_markup
  get :bar
  assert_valid_markup
end



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# File 'lib/assert_valid_markup.rb', line 31

def assert_valid_markup(fragment=@response.body, options={})
  opts = @@default_avm_options.merge(options)
  result = ''
  if opts[:validation_service] == :local
    result = local_validate(fragment, opts[:dtd_validate], opts[:catalog_path])
  else
    result = w3c_validate(fragment, opts[:dtd_validate])
  end
  assert result.empty?, result
end

#local_validate(xmldata, dtd_validate, catalog_path) ⇒ Object 



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# File 'lib/assert_valid_markup.rb', line 86

def local_validate(xmldata, dtd_validate, catalog_path)
  catalog_file = "#{catalog_path}/catalog"
  if ! File.exists? catalog_path
    puts "Creating xml catalog at: #{catalog_path}"
    FileUtils.mkdir_p(catalog_path)
    out = `xmlcatalog --noout --create '#{catalog_file}' 2>&1`
    if $? != 0
      puts out
      exit 1
    end
  end
  
  ENV["XML_DEBUG_CATALOG"] = ""
  ENV["SGML_CATALOG_FILES"] = catalog_file
  tmpfile = Tempfile.new('xmllint')
  tmpfile.write(xmldata)
  tmpfile.close
  validation_output = `xmllint --catalogs --memory --noout #{dtd_validate ? '--valid' : ''} #{tmpfile.path} 2>&1`.lines.to_a
  ENV.delete("XML_DEBUG_CATALOG")

  added_to_catalog = false
  last_sysid = ""
  validation_output.each do |line|
    line.chomp!
    if match = line.match(/Resolve: pubID (.*) sysID (.*)/)
      pubid = match[1]
      sysid = match[2]
      localdtd = "#{catalog_path}/#{sysid.split('/').last}"
      if ! File.exists? localdtd
        puts "Adding xml catalog resource\n\tpublic id: '#{pubid}'\n\turi: '#{sysid}'\n\tfile: '#{localdtd}'"
        if sysid =~ /^file:/
          basename = sysid.split('/').last
          dirname = last_sysid.gsub(/\/[^\/]*$/, '')
          sysid = "#{dirname}/#{basename}"
          puts "Using sysid relative to parent: #{sysid}"
        end

        sysid_contents = open(sysid, 'r', 0, 'User-Agent' => 'assert_valid_markup').read()
        open(localdtd, "w") {|f| f.write(sysid_contents)}
        added_to_catalog = true

        out = `xmlcatalog --noout --add 'public' '#{pubid}' 'file://#{localdtd}' '#{catalog_file}' 2>&1`
        if $? != 0
          puts out
          exit 1
        end
      end
      last_sysid = sysid
    end
  end
  if added_to_catalog
    return local_validate(xmldata, dtd_validate, catalog_path)
  else
    validation_failed = validation_output.grep(/^#{Regexp.escape(tmpfile.path)}:/)
    msg = []
    validation_failed.each do |l|
      msg << l.gsub(/^[^:]*:/, "Invalid markup: line ")
      if l =~ /^[^:]*:(\d+)/
        line = $1.to_i
        ((line - 1)..(line + 1)).each do |ln|
          msg << "\t#{ln}: #{xmldata.lines.to_a[ln-1]}"
        end
      end
    end
    return msg.join("\n")
  end
end

#skip_markup_validation ⇒ Object

Allows one to skip validation for the given block - useful when you use assert_all_valid_markup and need to only skip validation for a handful of tests



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# File 'lib/assert_valid_markup.rb', line 77

def skip_markup_validation
  begin
    @@skip_validation = true
    yield
  ensure
    @@skip_validation = false
  end
end

#w3c_validate(fragment, dtd_validate) ⇒ Object 



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# File 'lib/assert_valid_markup.rb', line 154

def w3c_validate(fragment, dtd_validate)
  validation_result = ''
  begin
    filename = File.join Dir::tmpdir, 'markup.' + Digest::MD5.hexdigest(fragment).to_s
    if ! ENV['NO_CACHE_VALIDATION']
      response = File.open filename {|f| Marshal.load(f) } unless ENV['NO_CACHE_VALIDATION'] rescue nil
    end
    if ! response
      response = Net::HTTP.start('validator.w3.org').post2('/check', "fragment=#{CGI.escape(fragment)}&output=xml")
      File.open filename, 'w+' do |f| Marshal.dump response, f end
    end
    markup_is_valid = response['x-w3c-validator-status']=='Valid'
    if ! markup_is_valid
      doc = XmlSimple.xml_in(response.body)
      validation_result = doc['messages'][0]['msg'].collect{ |m| "Invalid markup: line #{m['line']}: #{CGI.unescapeHTML(m['content'])}" }.join("\n")
    end
  rescue SocketError
    # if we can't reach the validator service, just let the test pass
    puts "WARNING: Could not reach w3c validator service"
  end
  return validation_result
end