public function test_tags()
 {
     $api = new \Cloudinary\Api();
     $result = Cloudinary\Uploader::upload("tests/logo.png");
     Cloudinary\Uploader::add_tag("tag1", $result["public_id"]);
     Cloudinary\Uploader::add_tag("tag2", $result["public_id"]);
     $info = $api->resource($result["public_id"]);
     $this->assertEquals($info["tags"], array("tag1", "tag2"));
     Cloudinary\Uploader::remove_tag("tag1", $result["public_id"]);
     $info = $api->resource($result["public_id"]);
     $this->assertEquals($info["tags"], array("tag2"));
     Cloudinary\Uploader::replace_tag("tag3", $result["public_id"]);
     $info = $api->resource($result["public_id"]);
     $this->assertEquals($info["tags"], array("tag3"));
 }