"Ensuring Secure Verification with Comprehensive Test Cases for OTP"​ (2024)

Here are some test cases for OTP (One-Time Password) verification:

1. Check if OTP is generated and sent to the correct user:

• Enter the user's phone number.
• Check if OTP is generated and sent to the entered phone number.
• Expected result: OTP should be sent to the entered phone number.

2. Verify the OTP input field:

• Enter OTP in the input field.
• Check if the input field only accepts numbers.
• Expected result: Only numbers should be accepted in the input field.

3. Verify OTP length:

• Check if the length of the OTP is 6 digits.
• Expected result: OTP should be 6 digits long.

4. Verify OTP expiration time:

• Check if the OTP is valid for a limited time.
• Check if the OTP becomes invalid after the expiration time.
• Expected result: OTP should be valid for a limited time and become invalid after the expiration time.

5. Check if OTP is verified successfully:

• Enter OTP in the input field.
• Check if the OTP is verified successfully.
• Expected result: OTP should be verified successfully.

6. Check if incorrect OTP is rejected:

• Enter an incorrect OTP in the input field.
• Check if the incorrect OTP is rejected.
• Expected result: Incorrect OTP should be rejected.

7. Check if the user can request another OTP:

• Check if the user can request another OTP if the first OTP was not entered correctly.
• Expected result: The user should be able to request another OTP.

8. Check if OTP is sent to multiple devices:

• Check if OTP can be sent to multiple devices for a single user.
• Expected result: OTP should be able to be sent to multiple devices.

9. Verify the OTP input field with special characters:

• Enter special characters in the OTP input field.
• Check if the input field only accepts numbers.
• Expected result: Only numbers should be accepted in the input field, special characters should be rejected.

10. Check if the user can resend OTP:

• Check if the user can resend OTP if it was not received.
• Expected result: The user should be able to resend OTP.

11. Check if the OTP input field has a character limit:

• Enter more characters than the limit in the OTP input field.
• Check if the input field only accepts 6 digits.
• Expected result: The input field should only accept 6 digits.

12. Verify the OTP validation process:

• Check if the OTP is validated on the server-side.
• Expected result: OTP should be validated on the server-side.

13. Check if OTP input is case-insensitive:

• Enter OTP in different cases in the input field.
• Check if the OTP is accepted regardless of the case.
• Expected result: OTP should be accepted regardless of the case.

14. Check if OTP is sent to the correct country code:

• Enter the user's phone number with a different country code.
• Check if the OTP is sent to the correct country code.
• Expected result: OTP should be sent to the correct country code.

15. Check if the OTP input field is disabled after successful verification:

• Enter the correct OTP in the input field.
• Check if the OTP input field is disabled after successful verification.
• Expected result: The OTP input field should be disabled after successful verification.

16. Check if a user is notified of OTP resend:

• Request another OTP.
• Check if the user is notified that a new OTP has been sent.
• Expected result: The user should be notified that a new OTP has been sent.

17. Check if the OTP input field is disabled after a certain number of attempts:

• Enter incorrect OTP multiple times.
• Check if the OTP input field is disabled after a certain number of attempts.
• Expected result: The OTP input field should be disabled after a certain number of attempts.

18. Check if the user is locked out after a certain number of attempts:

• Enter incorrect OTP multiple times.
• Check if the user is locked out after a certain number of attempts.
• Expected result: The user should be locked out after a certain number of attempts.

🔰 For Testing Purposes Use:

Note: This is just an example and not a secure way to implement OTP verification. For source code, comment below.

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