'If multiple values are given, but some of them are not valid, the valid
ones are selected.'

def test_multiple_values_invalid(self):

    self.check_html(self.widget(choices=self.beatles), 'beatles', ['J', 'G', 'foo'], html='<select    multiple="multiple"    name="beatles">\n                                                <option    value="J"    selected>John</option>\n                                                <option    value="P">Paul</option>\n                                                <option    value="G"    selected>George</option>\n                                                <option    value="R">Ringo</option>\n                                                </select>')
