mechanize：Mechanize::Form::Option#unselect, #untick

everyday Ruby

以下のような HTML で

<html>
<head>
<title>form test</title>
</head>
<body>

<form method="get" action="cgi/foo00.cgi" name="form1">
  <select name="select1">
    <option>1</option>
    <option>2</option>
  </select>
  <select name="select2" multiple>
    <option>foo</option>
    <option>bar</option>
  </select>
</form>

</body>
</html>
>> require 'mechanize'
=> true
>> agent = Mechanize.new
=> #<Mechanize:0xb74fa594 ...
>> page = agent.get('http://127.0.0.1:8080/test20_select.html')
=> #<Mechanize::Page
  ...
>> f = page.form('form1')
=> #<Mechanize::Form
  ...
>> f.fields[0].options[0].selected
=> false
>> f.fields[0].options[1].selected
=> false
>> f.fields[0].options[0].select
=> true
>> f.fields[0].options[0].selected
=> true
>> f.fields[0].options[1].selected
=> false
>> f.fields[0].options[0].unselect
=> false
>> f.fields[0].options[0].selected
=> false
>> f.fields[0].options[1].selected
=> false