Assuming that you are running on a TEST instance that is not publicly available, use the following procedure to test
- Open item summary
- View page source
- Copy all source to clipboard
- Paste html into https://developers.google.com/structured-data/testing-tool/
- Open item full page
- View page source
- Copy all source to clipboard
- Paste html into https://developers.google.com/structured-data/testing-tool/