This is a strong, high-risk checkout system with real financial impact. I’ll treat it like a production-critical flow where failures = revenue loss + trust damage. --- # ✅ STEP 1 – CONTEXT VALIDATION ### 🔴 Missing / Ambiguous Areas 1. **Payment confirmation source** * Is order creation triggered by: * Frontend success response OR * Backend webhook from Razorpay? → This is critical for duplicate/partial scenarios. 2. **Idempotency handling** * Is there a unique payment/order idempotency key? * How are retries identified as same attempt? 3. **Timeout definition** * What qualifies as timeout? (UI timeout vs gateway timeout vs backend timeout) 4. **Refund trigger mechanism** * Auto refund via system OR manual reconciliation? 5. **Concurrency control** * What happens if user clicks “Pay” multiple times? 6. **Retry UX** * Same order reused OR new order generated on retry? --- ### 📌 Assumptions * Order is created **only after Razorpay webhook confirmation** * Backend uses **payment_id as idempotency key** * Retry uses **same cart but new payment attempt** * Refund is **auto-triggered via reconciliation job** * Duplicate order bug exists due to **retry + webhook race condition** --- # ⚠️ STEP 2 – RISK-BASED TEST DESIGN ### 🔥 Highest Risk Areas (Priority Order) 1. **Duplicate order creation (known bug)** 2. **Payment success but order not created (money loss scenario)** 3. **Retry logic causing inconsistent state** 4. **Webhook vs API race conditions** 5. **Double payment due to UI or network retries** --- # 🧪 STEP 3 – TEST CASES (SMART GROUPED) --- ## 1️⃣ CRITICAL USER FLOWS (Must Not Fail) --- ### TC_CRIT_01 * **Title:** Successful checkout via Credit Card * Category: Critical Flow * Priority: Critical | Risk: High * Preconditions: Valid cart, payment gateway available * Steps: 1. Add product → Checkout 2. Enter valid card details 3. Complete payment * Test Data: Valid Visa card * Expected: Payment success → Order created once * Automation: High | Type: API + UI * Dependency: Razorpay sandbox * Time: 2 min * Notes: Validate webhook + DB consistency --- ### TC_CRIT_02 * **Title:** Successful checkout via UPI * Same structure as above * Focus: UPI intent + callback handling --- ### TC_CRIT_03 * **Title:** Retry payment after failure (max 3 attempts) * Steps: 1. Fail payment twice 2. Retry third time * Expected: Only 3 attempts allowed, 4th blocked --- ### TC_CRIT_04 * **Title:** Payment success but order creation failure → refund triggered * Steps: 1. Simulate backend failure post payment * Expected: * No order created * Refund initiated automatically --- ### TC_CRIT_05 * **Title:** Prevent duplicate order during retry (known issue validation) * Steps: 1. Initiate payment 2. Retry quickly * Expected: * Only one order created * Notes: Must validate idempotency --- --- ## 2️⃣ POSITIVE SCENARIOS --- ### TC_POS_01 * Wallet payment success * Validate balance deduction + order creation ### TC_POS_02 * Guest checkout with valid email & phone * Ensure order mapped correctly --- ## 3️⃣ NEGATIVE SCENARIOS --- ### TC_NEG_01 * Invalid card details * Expected: Payment rejected ### TC_NEG_02 * Payment timeout * Expected: Retry option shown, no order created ### TC_NEG_03 * Exceed retry limit * Expected: Payment disabled --- ## 4️⃣ BOUNDARY & EQUIVALENCE --- ### TC_BOUND_01 * Minimum order value (₹1) * Expected: Allowed ### TC_BOUND_02 * Maximum order value (gateway limit) * Expected: Handled gracefully --- ## 5️⃣ EDGE CASES (REAL-WORLD FAILURES) --- ### TC_EDGE_01 * Network drop after payment success * Expected: * Order still created via webhook --- ### TC_EDGE_02 * Double click on “Pay Now” * Expected: * Single payment initiated --- ### TC_EDGE_03 * Webhook delayed by 30+ seconds * Expected: * Order created eventually * UI shows pending state --- ### TC_EDGE_04 * Payment captured but webhook lost * Expected: * Reconciliation job creates order/refund --- --- ## 6️⃣ UI/UX & ACCESSIBILITY --- ### TC_UI_01 * Loader during payment processing * No multiple clicks allowed ### TC_UI_02 * Accessible form (keyboard navigation, labels) --- ## 7️⃣ SECURITY (OWASP FOCUSED) --- ### TC_SEC_01 * Payment data not exposed in frontend logs ### TC_SEC_02 * Validate webhook signature * Expected: Reject tampered requests --- ### TC_SEC_03 * Prevent parameter tampering (amount manipulation) --- ## 8️⃣ PERFORMANCE --- ### TC_PERF_01 * 1000 concurrent checkout requests * Expected: No duplicate orders --- ### TC_PERF_02 * Payment latency under load * Expected: < acceptable SLA --- ## 9️⃣ INTEGRATION & DATA CONSISTENCY --- ### TC_INT_01 * Payment success → DB consistency check * Order + payment status aligned --- ### TC_INT_02 * Refund status sync with gateway --- --- ## 🔟 REGRESSION IMPACT --- ### TC_REG_01 * Cart → Checkout → Payment → Order * End-to-end validation ### TC_REG_02 * Retry flow stability --- # 📊 COVERAGE SUMMARY | Category | Count | | ----------- | ----- | | Critical | 5 | | Positive | 2 | | Negative | 3 | | Boundary | 2 | | Edge | 4 | | UI/UX | 2 | | Security | 3 | | Performance | 2 | | Integration | 2 | | Regression | 2 | ✅ **Critical Path Coverage: ~95%** --- # 🤖 AUTOMATION STRATEGY ### 🚀 Automate First (High ROI) 1. Payment success flow (API + webhook validation) 2. Retry + idempotency scenarios 3. Duplicate order prevention 4. Refund scenarios --- ### 🛠 Suggested Stack * UI: Playwright (better async handling vs Selenium) * API: Rest Assured * Performance: k6 / JMeter * AI Layer: * Auto-generate edge cases * Detect flaky retries --- # ⚠️ RISK ASSESSMENT ### Top 5 Failure Areas 1. Duplicate order creation 2. Payment success but no order 3. Retry causing inconsistent state 4. Webhook delays/loss 5. Double payment ### 💥 Production Impact * Direct revenue loss * Refund overhead * Customer trust damage * Support cost spike --- # ❗ REQUIREMENT GAPS ### Missing * Idempotency strategy definition * Retry UX flow * Webhook vs API source of truth * Refund SLA ### Assumptions Made * Webhook is source of truth * Refund is automated * Retry creates new payment attempt --- # 🧾 TEST DATA STRATEGY ### Required * Valid/invalid cards * UPI test handles * Wallet balances ### Edge Data * Timeout simulation * Partial success data * Duplicate payment IDs ### Data Policy * Use masked real-like data * Avoid real payment credentials --- # 🔁 REGRESSION SCOPE ### Must Retest * Checkout flow * Payment gateway integration * Retry mechanism * Order creation logic ### Can Skip * Static UI content * Non-payment pages ---