Test point for the form's submit button

Test points of the submit button in the web form: points that
need to be clearly understood before submitting:
1. Which fields are required in
the form 2. Restrictions on the content of the fields in the form: non-empty, repeating, length, special characters, spaces, And some business-related constraints

Test points:
           1. Whether to support Enter
            2. Click
            3. Double-click quickly, which may lead to repeated submission of bugs
            4. Network interruption
            5. Only enter the required items and click submit
            6. Missing a required item, click submit (invalid equivalence classes cannot be combined)
            7. The maximum length of all fields, click submit
            8. All required items + non-required items, click submit
            9. Whether the submission is successful Tip
            10. If there is an attachment uploaded, the attachment is too large, the network is slow, whether the submission is successful
            11. Whether the content is encrypted after the form is submitted,
            12. SQL injection
            13. Permission verification, that is to say, only people with permissions can submit