Testing Phone Number using Selenium

I have given a task by my Project Manager and he has asked me to "Test a phone number using selenium". He has asked me to cover all the test cases possible to test a phone number

The test cases are given below: 1. Phone number must contain digits only. 2. Phone number length should be 10. 3. It should not contain alphabets. 4. It should not contain symbols. 5. It should not contain the combination of alphanumerics. 6. Phone number should not start with 0.

Please help me in testing all these test cases in automation.