Before going to start with test case writing, I would love to suggest you read the below article, it may help to explore more about mobile app testing...
Visit Here: How to Test Mobile Application?"
"Hello Shaliendra,Following is the example from mobile testing services, that you can use to write tests for IPad.
Sample Test Scenario: Verify that user is login to mobile application
Pre-requisite1. There should be an active mobile data…"