//  [ruby]
  def test_should_sanitize_img_dynsrc_lowsrc
    assert_sanitized(%(<img lowsrc="javascript:alert('XSS')" />), "<img />")
  end

  def test_should_sanitize_div_background_image_unicode_encoded
    raw = %(background-image:\0075\0072\006C\0028'\006a\0061\0076\0061\0073\0063\0072\0069\0070\0074\003a\0061\006c\0065\0072\0074\0028.1027\0058.1053\0053\0027\0029'\0029)
    assert_equal '', sanitize_css(raw)
  end

  def test_should_sanitize_div_style_expression
    raw = %(width: expression(alert('XSS'));)
    assert_equal '', sanitize_css(raw)
  end

  def test_should_sanitize_across_newlines
    raw = %(\nwidth:\nexpression(alert('XSS'));\n)
    assert_equal '', sanitize_css(raw)
  end

  def test_should_sanitize_img_vbscript
    assert_sanitized %(<img src='vbscript:msgbox("XSS")' />), '<img />'
  end

  def test_should_sanitize_cdata_section
    assert_sanitized "<![CDATA[<span>section</span>]]>", "section]]&gt;"
  end

  def test_should_sanitize_unterminated_cdata_section
    assert_sanitized "<![CDATA[<span>neverending...", "neverending..."
  end

  def test_should_not_mangle_urls_with_ampersand
     assert_sanitized %{<a href=\"http://www.domain.com?var1=1&amp;var2=2\">my link</a>}
  end

  def test_should_sanitize_neverending_attribute
    assert_sanitized "<span class=\"\\", "<span class=\"\\\">"
  end

  [
    %(<a href="javascript&#x3a;alert('XSS');">),
    %(<a href="javascript&#x003a;alert('XSS');">),
    %(<a href="javascript&#x3A;alert('XSS');">),
    %(<a href="javascript&#x003A;alert('XSS');">)
  ].each_with_index do |enc_hack, i|
    define_method "test_x03a_handling_#{i+1}" do
      assert_sanitized enc_hack, "<a>"
    end
  end

  def test_x03a_legitimate
    assert_sanitized %(<a href="http&#x3a;//legit">), %(<a href="http://legit">)
    assert_sanitized %(<a href="http&#x3A;//legit">), %(<a href="http://legit">)
  end

  def test_sanitize_ascii_8bit_string
    white_list_sanitize('<a>hello</a>'.encode('ASCII-8BIT')).tap do |sanitized|
      assert_equal '<a>hello</a>', sanitized
      assert_equal Encoding::UTF_8, sanitized.encoding
    end
  end

protected

  def xpath_sanitize(input, options = {})
    XpathRemovalTestSanitizer.new.sanitize(input, options)
  end

  def full_sanitize(input, options = {})
    Rails::Html::FullSanitizer.new.sanitize(input, options)
  end

  def link_sanitize(input, options = {})
    Rails::Html::LinkSanitizer.new.sanitize(input, options)
  end

  def white_list_sanitize(input, options = {})
    Rails::Html::WhiteListSanitizer.new.sanitize(input, options)
  end

  def assert_sanitized(input, expected = nil)
    if input
      assert_dom_equal expected || input, white_list_sanitize(input)
    else
      assert_nil white_list_sanitize(input)
    end
  end

  def sanitize_css(input)
    Rails::Html::WhiteListSanitizer.new.sanitize_css(input)
  end

  def scope_allowed_tags(tags)
    Rails::Html::WhiteListSanitizer.allowed_tags = tags
    yield Rails::Html::WhiteListSanitizer.new

  ensure
    Rails::Html::WhiteListSanitizer.allowed_tags = nil
  end

  def scope_allowed_attributes(attributes)
    Rails::Html::WhiteListSanitizer.allowed_attributes = attributes
    yield Rails::Html::WhiteListSanitizer.new

  ensure
    Rails::Html::WhiteListSanitizer.allowed_attributes = nil
  end
end