public function testSanitize()
{
$this->assertEquals("Mixed_with_English_and", $this->object->sanitize("Mixed with English and 日本人"));
$this->assertEquals("Mixed_with_English_and_.doc", $this->object->sanitize("Mixed with English and 日本人.doc"));
$this->assertEquals("Mixed_with_English_and_.", $this->object->sanitize("Mixed with English and 日本人.日本人"));
$this->assertEquals("903910d73b335d7ef5c78fec3ca36891", $this->object->sanitize("日本人"));
$this->assertEquals("a4a76883426db812ed7e71efbb9fcea0.doc", $this->object->sanitize("日本人.doc"));
$this->assertEquals("f491ec23fce87df961290adb8fc8f153", $this->object->sanitize("日本人.日本人"));
}