function testWrapString()
{
$str = 'Hello';
$str = new DeprecationWrapper($str, 'BAD!', 1.8, array($this, 'report'));
$file = __FILE__;
$new_str = "{$str}";
$line = __LINE__;
$this->assertEquals('Hello', $new_str);
$this->assertEquals("{$file}:{$line}", $this->last_stack_line);
}