TEST TYPE: dashboard_functional

Based on the task description provided, here are 10 relevant and high-quality dashboard_functional test cases for the Tweak in coupon feature to manage discount in Stripe subscription:

1. Title: TC_FUNC_001_Verify_Coupon_Addition
   Scenario: Verify that a user can successfully add a coupon code to a Stripe subscription.
   Preconditions: User is logged in and has a valid Stripe subscription.
   Steps to Reproduce:
   1. Navigate to the subscription management section.
   2. Click on the option to add a coupon code.
   3. Enter a valid coupon code.
   Expected Result: The coupon code is applied successfully, and the subscription price reflects the discount.
   Actual Result: To be filled during execution
   Priority: High
   Test Data: Valid coupon code

2. Title: TC_FUNC_002_Verify_Invalid_Coupon_Rejection
   Scenario: Ensure that an invalid coupon code is rejected during the subscription process.
   Preconditions: User is logged in and has a valid Stripe subscription.
   Steps to Reproduce:
   1. Navigate to the subscription management section.
   2. Attempt to apply an invalid coupon code.
   Expected Result: The system displays an error message indicating that the coupon code is invalid.
   Actual Result: To be filled during execution
   Priority: High
   Test Data: Invalid coupon code

3. Title: TC_FUNC_003_Verify_Coupon_Expiry
   Scenario: Test if a coupon with an expiry date correctly stops providing a discount after expiry.
   Preconditions: User is logged in and has a valid Stripe subscription with an applied coupon.
   Steps to Reproduce:
   1. Wait for the coupon to reach its expiry date.
   2. Check the subscription pricing.
   Expected Result: The subscription no longer reflects the discount after the coupon expiry date.
   Actual Result: To be filled during execution
   Priority: Medium
   Test Data: Coupon with expiry date

4. Title: TC_FUNC_004_Verify_Multiple_Coupons
   Scenario: Verify the system behavior when multiple coupons are applied to a single subscription.
   Preconditions: User is logged in and has a valid Stripe subscription.
   Steps to Reproduce:
   1. Apply multiple valid coupon codes to the subscription.
   Expected Result: System should apply only one coupon with the highest discount, ignoring others.
   Actual Result: To be filled during execution
   Priority: Medium
   Test Data: Multiple valid coupon codes

5. Title: TC_FUNC_005_Verify_Coupon_Stacking
   Scenario: Test if the system allows stacking of multiple coupons on a single subscription.
   Preconditions: User is logged in and has a valid Stripe subscription.
   Steps to Reproduce:
   1. Apply multiple valid coupons to the subscription.
   Expected Result: All applied coupons should be considered, and the discounts should stack.
   Actual Result: To be filled during execution
   Priority: Medium
   Test Data: Multiple valid coupon codes

6. Title: TC_FUNC_006_Verify_Coupon_Limitations
   Scenario: Validate the system's behavior when a coupon has usage limitations.
   Preconditions: User is logged in and has a valid Stripe subscription.
   Steps to Reproduce:
   1. Apply a coupon with usage limitations (e.g., one-time use).
   2. Try to reuse the coupon after it has been used.
   Expected Result: System should not apply the coupon again once it reaches its usage limit.
   Actual Result: To be filled during execution
   Priority: Medium
   Test Data: Coupon with usage limitations

7. Title: TC_FUNC_007_Verify_Coupon_Invalidation
   Scenario: Test the system's response when a coupon is invalidated or disabled.
   Preconditions: User is logged in and has a valid Stripe subscription with an applied coupon.
   Steps to Reproduce:
   1. Invalidate or disable the applied coupon.
   2. Check the subscription pricing.
   Expected Result: The discount should be removed, and the subscription pricing should reflect the change.
   Actual Result: To be filled during execution
   Priority: High
   Test Data: Disabled coupon code

8. Title: TC_FUNC_008_Verify_Coupon_Validation
   Scenario: Validate that the system verifies the authenticity of a coupon code before applying it.
   Preconditions: User is logged in and has a valid Stripe subscription.
   Steps to Reproduce:
   1. Attempt to apply a fake or non-existent coupon code.
   Expected Result: System should reject the fake coupon code and display an appropriate error message.
   Actual Result: To be filled during execution
   Priority: High
   Test Data: Fake or non-existent coupon code

9. Title: TC_FUNC_009_Verify_Coupon_Refresh
   Scenario: Test if the system updates the subscription pricing immediately after applying a coupon.
   Preconditions: User is logged in and has a valid Stripe subscription.
   Steps to Reproduce:
   1. Apply a valid coupon code to the subscription.
   2. Check the subscription pricing.
   Expected Result: The subscription pricing should reflect the discount without requiring a page refresh.
   Actual Result: To be filled during execution
   Priority: Medium
   Test Data: Valid coupon code

10. Title: TC_FUNC_010_Verify_Coupon_Removing
    Scenario: Verify that a user can remove a previously applied coupon from the subscription.
    Preconditions: User is logged in and has a valid Stripe subscription with an applied coupon.
    Steps to Reproduce:
    1. Navigate to the subscription management section.
    2. Remove the applied coupon from the subscription.
    Expected Result: The discount from the removed coupon should no longer reflect on the subscription pricing.
    Actual Result: To be filled during execution
    Priority: High
    Test Data: Applied coupon code

These test cases cover a range of scenarios related to managing discounts in Stripe subscriptions using coupon codes.