public function testHtmlPatternEscaping() {
$constraint = new Regex(array(
'pattern' => '/^[0-9]+\\/$/',
));
$this
->assertEquals('[0-9]+/', $constraint
->getHtmlPattern());
$constraint = new Regex(array(
'pattern' => '#^[0-9]+\\#$#',
));
$this
->assertEquals('[0-9]+#', $constraint
->getHtmlPattern());
}