How to form a query using StartsWith?

If you think that Like query is safe, and you use it for any other object, like opportunity, and then an admin adds workflow or code to make a standard naming format for the record, which is a common practice, in that case, your test will fail because the name was changed and the records will not be found via the Like operator.

If the product is created during setup, then we can use ID != {Method Product ID} or If the product is created during the method, we can use id = {Method Product ID}. It would be best to use the ID to query for the record, as it will ensure that your test can survive any changes made in the org that are not in your control.