Subscription Purchase Testing Checklist (2026)
Subscription Purchase Testing Checklist (2026) provides a concrete, step‑by‑step matrix you can follow to verify every aspect of a recurring‑payment flow before it reaches users. This guide groups 30+
Subscription Purchase Testing Checklist (2026) provides a concrete, step‑by‑step matrix you can follow to verify every aspect of a recurring‑payment flow before it reaches users. This guide groups 30+ actionable items into happy‑path validation, error handling, edge/boundary conditions, accessibility, security/privacy, performance, and release readiness. Each item includes a clear pass criterion, a real‑world example, and notes on how an autonomous explorer such as the SUSA agent can exercise the check in a single pass, reducing manual effort while increasing coverage.
Why a dedicated checklist matters in 2026
Subscription models have become the default revenue mechanism for SaaS, media, fitness, and IoT products. A flaw in the purchase flow can lead to immediate revenue loss, charge‑back spikes, or regulatory penalties. Because subscription purchases involve multiple systems—UI, payment gateway, entitlement service, billing engine, analytics, and compliance layers—testing must be systematic. A checklist transforms vague “test the purchase” instructions into measurable, repeatable steps that can be tracked in test‑management tools, attached to pull‑request templates, or fed into CI pipelines.
Subscription Purchase Testing Checklist (2026) – Happy Path
The happy path validates that a legitimate user can complete a subscription purchase without obstruction. Below is a test matrix that you can copy into a spreadsheet or test‑case manager.
| # | Test Item | Description | Pass Criteria | Example |
|---|---|---|---|---|
| 1 | UI entry point visibility | The “Subscribe” button or plan selector is visible on the landing screen. | Element is present, enabled, and contrasts with background (≥4.5:1). | On a fitness app, the “Start Free Trial” button appears above the fold. |
| 2 | Plan selection | Tapping a plan highlights it and shows correct price, billing interval, and trial length. | Selected plan displays: price, currency, interval (monthly/annual), trial days if any. | Selecting “Premium – $9.99/mo” shows “$9.99 per month, 7‑day free trial”. |
| 3 | Price formatting | Prices respect locale (currency symbol, decimal separator). | Price string matches locale format for the device’s language/region. | For fr‑FR, price appears as “9,99 €/mo”. |
| 4 | Trial initiation | If a trial is offered, the flow does not charge immediately and sets a trial end date. | No charge authorization appears; entitlement service records trial_start and trial_end. | After confirming trial, backend shows trial_end = now + 7 days. |
| 5 | Payment sheet invocation | Tapping “Confirm” launches the platform‑specific payment sheet (Apple Pay/Google Pay) or card entry form. | Payment sheet opens within 2 seconds; no UI freeze. | Android shows Google Pay sheet with merchant name and amount. |
| 6 | Successful payment response | The gateway returns a success token; the app receives it and forwards it to the entitlement service. | HTTP 200 from gateway; app displays “Thank you” screen; entitlement marks user as active. | Stripe returns payment_intent.succeeded; app shows confirmation toast. |
| 7 | Entitlement grant | Upon success, the app unlocks premium features instantly. | All paid‑only screens/modules become accessible without restart. | User can now access “Advanced Workouts” tab immediately. |
| 8 | Receipt validation | The app validates the receipt with the backend (or directly with store) and handles refresh tokens. | Backend verifies receipt signature; returns valid subscription object; app stores refresh token securely. | iOS receipt verification endpoint returns expires_date 30 days ahead. |
| 9 | Analytics event fire | Purchase success triggers the expected analytics event (e.g., subscription_start). | Event logged with correct parameters: plan_id, amount, currency, trial_flag. | Mixpanel receives {event: "subscription_start", plan: "premium_monthly"}. |
| 10 | Email receipt | If configured, the user receives a purchase confirmation email within 1 minute. | Email contains plan details, transaction ID, and link to manage subscription. | User receives “Your Premium subscription – Transaction #12345”. |
| 11 | Recovery from background | If the app is backgrounded during payment sheet, returning restores the correct state. | App resumes at the confirmation screen or shows appropriate error if payment cancelled. | User switches to mail, returns; app shows “Payment pending…”. |
| 12 | Cancel during sheet | User can abort payment from the sheet without side effects. | No entitlement change; app returns to plan selection screen with no error toast. | Pressing “Cancel” in Google Pay returns to plan screen, no charge. |
| 13 | Duplicate purchase prevention | Rapid double‑tap does not create two subscriptions. | Only one entitlement record created; second tap shows “Already subscribed” or disables button. | Double‑tap within 500 ms results in single subscription. |
| 14 | Network retry | If the payment request fails due to transient network, the app retries with exponential backoff. | After 2 failed attempts, a third succeeds and purchase completes. | Simulated 503 gateway response; app retries after 1s, 2s, 4s; third attempt succeeds. |
| 15 | Graceful degradation | If entitlement service is down but payment succeeded, the app queues the entitlement grant. | App shows “Activating…” indicator; once service responds, entitlement is applied. | Mock entitlement service returns 503; app stores pending grant locally, applies after recovery. |
How SUSA covers happy‑path items:
When you point the SUSA agent at a subscription flow, its curious persona explores every visible control, attempts to tap the Subscribe button, follows the payment sheet, and validates success states by checking for UI changes (e.g., new premium tabs). The agent records network traffic, captures the payment token, and verifies that an entitlement flag flips. Because SUSA runs with multiple personas (including a power‑user who taps rapidly), it also checks duplicate‑tap prevention and background‑return behavior in the same pass.
Subscription Purchase Testing Checklist (2026) – Error Handling & Edge Cases
Error handling ensures the purchase flow degrades gracefully when something goes wrong. Edge cases probe boundaries that rarely appear in manual scripts but can surface under load or with specific device states.
| # | Test Item | Description | Pass Criteria | Example |
|---|---|---|---|---|
| 16 | Payment declined | Gateway returns a decline code (insufficient funds, expired card). | App shows a clear, user‑friendly error (“Card declined – try another payment method”) and does not grant entitlement. | Stripe returns card_declined; app displays toast with retry button. |
| 17 | Invalid card details | User enters malformed number, wrong CVC, or future expiry date. | Inline validation highlights the field; submission is blocked until corrected. | Entering “123” in card number shows red underline and “Invalid number”. |
| 18 | Network loss mid‑transaction | Wi‑Fi drops after the payment sheet is shown but before the gateway responds. | App detects loss, shows “No connection – retry?” and retains the payment sheet state for retry. | Using Android’s adb shell emulated network disconnect triggers retry dialog. |
| 19 | Airplane mode | Entire flow started with airplane mode on. | App prevents launch of payment sheet and shows offline error before any gateway call. | User taps Subscribe; app shows “You are offline – connect to continue”. |
| 20 | Store‑side purchase interruption (iOS/Android) | User cancels authentication (Face ID, PIN) within the native payment sheet. | App receives a cancellation callback, shows “Purchase cancelled”, no entitlement change. | Pressing side button to cancel Face ID returns to app with cancellation event. |
| 21 | Price change during flow | Backend updates price while user is on payment sheet (e.g., promotional ends). | App either honors the price shown at sheet launch or shows a mismatch warning before confirming. | Price changes from $4.99 to $5.99; app displays “Price updated to $5.99 – confirm?”. |
| 22 | Duplicate subscription via deep link | User opens a universal link that attempts to start a second subscription while already active. | App detects existing entitlement and shows “You are already subscribed” instead of launching flow. | Deep link myapp://subscribe?plan=premium shows inline banner, no new purchase. |
| 23 | Subscription renewal simulation | Using test environment, fast‑forward time to trigger renewal and verify entitlement continuation. | After simulated renewal date, entitlement remains active; renewal receipt is processed. | In Google Play test account, set license test response to RENEWED; app extends access. |
| 24 | Refund initiation | User requests refund via app store; app receives refund webhook. | App revokes entitlement immediately or within grace period, shows “Subscription cancelled”. | Apple sends refund webhook; app removes premium UI and shows reactivation CTA. |
| 25 | Chargeback handling | Payment gateway notifies of a chargeback; app must suspend access. | Upon chargeback webhook, entitlement is revoked; user sees “Access suspended due to payment issue”. | Stripe charge.dispute.closed with outcome lost triggers access removal. |
| 26 | Family sharing / group plan | User joins a family group that already has a subscription; they should not be charged again. | App detects existing group entitlement and disables purchase UI for that plan. | Apple Family Sharing: user sees “Already shared” label on plan. |
| 27 | Promo code application | User enters a valid promo code; discount reflects in price sheet and final charge. | Price shown after code entry matches (original price – discount); entitlement granted at discounted rate. | Code “SAVE20” reduces $9.99 to $7.99; receipt shows $7.99 charge. |
| 28 | Invalid/expired promo code | User enters a code that is not valid for the selected plan or is expired. | App shows inline error (“Code not applicable”) and does not alter price. | Entering “OLDSALE” on a plan that only accepts “NEWUSER” yields error. |
| 29 | Currency mismatch | User’s account locale differs from merchant’s default currency (e.g., user in GB, merchant charges in USD). | App displays amount in user’s local currency with correct conversion or shows both amounts. | Merchant charges $9.99; app shows “£8.20 (≈ $9.99)”. |
| 30 | Tax calculation | Taxes are applied according to jurisdiction and shown before confirmation. | Tax line item appears; total = subtotal + tax; matches tax rate for user’s billing address. | For a US user in NY, 8.875% tax adds $0.89 to $9.99 subtotal. |
| 31 | Failed entitlement service call after success | Payment succeeds but entitlement service returns 500. | App queues the entitlement grant, shows “Activating…”, and retries until success or timeout (max 5 min). | Simulated 500 response; app retries every 15 s, finally receives 200 and unlocks features. |
| 32 | User disables notifications during purchase | System notification channel is off; app should not rely on toast for critical errors. | Critical errors are shown via in‑app dialog or snack bar, not only via toast. | Disabling channel; app still shows modal error for declined card. |
| 33 | Low battery mode | Device in low‑power mode may throttle background services. | Purchase flow still completes; any background verification does not exceed 5 % CPU. | Using Android’s Battery Historian, verify no spikes >5 % during flow. |
| 34 | Rooted / jailbroken device detection (if applicable) | App may block purchase on compromised devices for security. | On a rooted device, purchase is either blocked with clear reason or allowed but with extra attestation. | Using Magisk, app shows “Security check failed – cannot subscribe”. |
| 35 | Concurrent purchases from multiple devices | Same account attempts to buy subscription on two devices simultaneously. | Server ensures idempotency; only one entitlement created; second attempt receives “Already active”. | Two phones submit request within 200 ms; backend returns 200 for first, 409 for second. |
How SUSA covers error handling & edge cases:
The adversarial persona in SUSA deliberately triggers failure conditions: it simulates network loss via the built‑in network throttling plugin, injects malformed card data, and repeatedly taps the Subscribe button to test duplicate‑prevention. The curious persona explores deep links and promo‑code fields, while the elderly persona verifies that error messages remain legible and actionable under reduced contrast settings. By logging all HTTP responses and UI state changes, SUSA produces a detailed report that maps each observed failure to the checklist items above, letting you see which edge cases were exercised automatically.
Subscription Purchase Testing Checklist (2026) – Accessibility Considerations
Accessibility is not a nice‑to‑have; it is a legal requirement in many jurisdictions and directly impacts conversion. The following items ensure the purchase flow works for users relying on assistive technologies.
| # | Test Item | Description | Pass Criteria | Example |
|---|---|---|---|---|
| 36 | Screen‑reader labeling | All interactive elements (buttons, inputs, price text) have meaningful accessibilityLabel or contentDescription. | Labels convey purpose and state (e.g., “Subscribe button, dimmed, unavailable”). | TalkBack reads “Subscribe button, disabled”. |
| 37 | Focus order | Tab or swipe focus moves logically through the flow: plan selection → price → promo → pay → confirm. | No focus jumps or traps; focus returns to previous screen after cancel. | Using VoiceOver, swipe moves from plan card to price text to “Enter promo” field. |
| 38 | Dynamic type support | Text scales correctly when user increases font size (iOS Dynamic Type, Android font scaling). | No clipping, overflow, or truncation at 200 % scaling. | At 240 % size, price label still fully visible; button height expands. |
| 39 | Contrast ratio | Text and icons meet WCAG AA (≥4.5:1 for normal text, ≥3:1 for large text). | Contrast verified with automated tool (axe, lighthouse) or manual check. | Red error text on white background measures 5.2:1. |
| 40 | Touch target size | Interactive targets are at least 48 dp (Android) or 44 × 44 pt (iOS). | Measure with layout inspector; no smaller targets. | “Apply promo” button is 56 dp × 56 dp. |
| 41 | Accessible error messages | Errors are announced by screen readers and include actionable guidance. | Error announcement contains what went wrong and how to fix it (e.g., “Card number invalid – please check the digits”). | TalkBack reads “Error: Card number invalid. Please re‑enter”. |
| 42 | Motion reduction | Animations (e.g., button press ripple) respect prefers-reduced-motion setting. | When reduced motion is enabled, non‑essential animations are disabled or substituted with fade. | Turning on Reduce Motion disables the pulsating subscribe button animation. |
| 43 | Language localization | All strings in the purchase flow are localized and respect right‑to‑left layouts where applicable. | UI mirrors correctly; no hard‑coded English strings appear in Arabic/Hebrew layouts. | Switching to Arabic shows plan titles right‑aligned, icons mirrored. |
| 44 | Assistive tech compatibility with payment sheet | The native payment sheet (Apple Pay/Google Pay) remains accessible when launched from the app. | Screen reader can navigate the sheet; focus returns to app after completion. | Using VoiceOver, user can hear “Apple Pay sheet, amount $9.99, Pay button”. |
| 45 | Testing with accessibility scanner | Automated accessibility tests run on each build and fail on new violations. | CI job returns zero new violations; any violation blocks merge. | Running npm run test:a1xe returns no new issues on PR. |
How SUSA covers accessibility:
SUSA includes a persona that simulates a user with low vision and another that mimics a screen‑reader user. These personas navigate the flow using accessibility APIs, checking for missing labels, incorrect focus order, and insufficient contrast. The platform’s built‑in axe‑core integration flags any WCAG violations directly in the test report, allowing you to verify items 36‑44 without writing separate accessibility tests.
Subscription Purchase Testing Checklist (2026) – Security & Privacy
Security flaws in subscription handling can lead to credential theft, replay attacks, or privacy violations. The checklist below addresses the most common threat vectors.
| # | Test Item | Description | Pass Criteria | Example |
|---|---|---|---|---|
| 46 | Payment token storage | After a successful purchase, any payment token received from the gateway must be stored encrypted in the OS‑protected keystore (iOS Keychain, Android EncryptedSharedPreferences or Keystore). | Token is not written to plain‑text files or logs; retrieval requires biometric or device unlock. | Using adb shell run-as com.myapp cat /data/data/com.myapp/shared_prefs/… shows encrypted blob. |
| 47 | Replay attack resistance | The app includes a nonce or transaction ID that the gateway validates; re‑sending the same token is rejected. | Captured token replay results in gateway error (invalid_request). | Using mitmproxy to resend payment_token yields error: duplicate transaction. |
| 48 | Secure transmission | All network calls related to payment and entitlement use TLS 1.2+ with certificate pinning (where feasible). | No HTTP fallback; pinning errors cause connection abort, not fallback to plaintext. | SSL Labs test shows A+ rating; pinning mismatch triggers CertificatePinningException. |
| 49 | Minimal permission request | The app does not request unnecessary permissions (e.g., SMS, contacts) solely for purchase flow. | Permission manifest only includes those required for core functionality (internet, billing). | AndroidManifest.xml lacks READ_SMS. |
| 50 | GDPR / CCPA consent | If personal data (email, billing address) is collected, a clear consent checkbox is presented before submission, with link to privacy policy. | Consent is unchecked by default; submission blocked until checked; consent log stored. | Checkbox label: “I agree to the Terms of Service and Privacy Policy”. |
| 51 | Data minimization | Only the minimal fields needed for payment gateway are transmitted (e.g., no full name unless required). | Request payload excludes extraneous personal data. | Stripe request contains email and payment_method_data only; no address_line2. |
| 52 | Secure error messaging | Error messages do not leak gateway internals or raw API responses. | User‑visible errors are generic (“Payment failed – try again”) while detailed logs are server‑side. | Seeing “card_declined” in UI is acceptable only if mapped from generic message; raw Stripe JSON not shown. |
| 53 | Protection against clickjacking | If the purchase flow can be embedded in a web view, the app enforces X-Frame-Options: DENY or CSP frame‑ancestors. | Attempt to load payment page in an iframe is blocked. | Loading https://pay.example.com in an iframe returns Refused to display. |
| 54 | Token expiration handling | Payment tokens (e.g., Apple’s paymentToken) have a short validity window; app must use them immediately. | App initiates gateway request within 2 seconds of receiving token; delayed use results in error. | Using a debugger to pause after token receipt >5 s leads to token_expired from gateway. |
| 55 | Regular dependency scanning | Third‑party payment SDKs are scanned for known vulnerabilities (e.g., via OWASP Dependency‑Check). | Build fails if any SDK version has a CVE ≥ 7.0. | gradle dependencies shows com.stripe:stripe-android:20.3.0 flagged; upgrade to 20.5.0 required. |
| 56 | Privacy‑preserving analytics | Analytics events related to purchase exclude PAN, token, or full email; only hashed or aggregated data is sent. | Event payload does not contain raw card number or token. | Mixpanel event includes plan_id: "premium" and amount_hashed: "a3f1…". |
| 57 | Secure refresh token storage | If the app uses refresh tokens for subscription renewal, they are stored in the same secure vault as payment tokens. | Refresh token never appears in plain‑text logs or clipboard. | Using logcat shows no refresh_token string after renewal flow. |
| 58 | Biometric gating for high‑value actions | For subscription changes (upgrade/downgrade, cancel), app may require biometric confirmation. | Action proceeds only after successful fingerprint/face ID; otherwise, shows “Authentication required”. | Cancel subscription triggers BiometricPrompt; without auth, action aborted. |
| 59 | Audit log integrity | Security‑relevant events (purchase, refund, entitlement change) are written to an append‑only log with cryptographic hash chaining. | Log entries cannot be altered without detection; verification passes on periodic audit. | Using SHA‑256 chain; tampering leads to hash mismatch alert. |
| 60 | Security headers for web‑based flows | If any part of the flow uses a web view (e.g., for promo code redemption), security headers such as Content‑Security‑Policy, Strict‑Transport‑Security, and X‑Content‑Type‑Options are present. | Response headers inspected; missing headers cause test failure. | curl -I https://promo.example.com shows strict-transport-security: max-age=31536000. |
How SUSA covers security & privacy:
SUSA’s adversarial persona attempts common attack vectors: it replays captured payment tokens, tries to downgrade TLS version, and injects malformed JavaScript into web‑view contexts. The platform also checks for plain‑text token storage by scanning the app’s sandbox after a purchase run. Any deviation from the pass criteria triggers a high‑severity finding in the report, letting you verify items 46‑60 without custom security test scripts.
Subscription Purchase Testing Checklist (2026) – Performance & Load
Performance issues can manifest as slow checkout, increased abandonment, or excessive battery drain. This section ensures the flow remains responsive under typical and peak conditions.
| # | Test Item | Description | Pass Criteria | Example |
|---|---|---|---|---|
| 61 | End‑to‑end latency | Measure time from tapping “Subscribe” to seeing the confirmation screen (excluding external gateway latency that is outside your control). | 90th‑percentile latency ≤ 3 seconds on mid‑tier device (e.g., Snapdragon 7‑gen 2). | Using Android Studio Profiler, average 2.1 s across 20 runs. |
| 62 | Frame‑rate during animation | Any UI animations (button ripple, progress spinner) should maintain ≥ 55 fps to avoid jank. | GPU render time < 16 ms per frame. | Using adb shell gfxinfo shows 98 % of frames under 16 ms. |
| 63 | Battery impact | A full purchase flow should not drain more than 0.5 % of battery on a typical 3000 mAh device. | Measure with adb shell dumpsys batterystats before/after flow. | Pre‑flow 85 %, post‑flow 84.6 % → 0.4 % drain. |
| 64 | Memory leak detection | No unbounded growth in heap after repeated purchase flows (simulate 50 cycles). | Heap increase < 2 MB after 50 iterations; no objects retained in LeakCanary. | LeakCanary reports no leaks after 50 cycles. |
| 65 | Concurrent user simulation | Using a load‑testing tool (e.g., k6, Gatling), simulate 100 users performing purchase flows within a 2‑minute window. | Success rate ≥ 98 %; average latency ≤ 4 s; no HTTP 5xx spikes. | k6 script shows 99 % success, 3.2 s avg, 0 % 5xx. |
| 66 | Cold start performance | First launch of the app after device boot should still allow a purchase flow within acceptable latency. | Cold start + purchase ≤ 5 s on median device. | Using adb shell am start -W shows 4.8 s total. |
| 67 | Network throttling resilience | Under simulated 3G speeds (≈1.5 Mbps down, 750 kbps up) the flow completes without timeout. | Flow completes within 1.5× baseline latency; no UI freeze. | Using Chrome DevTools throttling, latency 4.2 s (baseline 2.8 s). |
| 68 | Power‑save mode effect | With battery saver enabled, any background services used for receipt validation should not be blocked excessively. | Validation completes within 8 s; user sees “Verifying…” spinner not stuck. | Enabling Android Battery Saver, validation takes 6.3 s. |
| 69 | UI thread off‑loading | Heavy work (network calls, cryptographic verification) must be performed off the main thread. | StrictMode (Android) or MainThreadChecker (iOS) reports zero violations during flow. | Running with StrictMode.setThreadPolicy shows no disk/network violations. |
| 70 | Graceful degradation under high CPU load | If the device is at 90 % CPU usage from other apps, purchase flow should still complete, albeit slower. | Latency increases ≤ 2× baseline; no crashes or ANRs. | Using stress-ng --cpu 4 --timeout 30s shows latency 5.9 s (baseline 2.8 s). |
| 71 | Analytics sampling under load | Ensure analytics instrumentation does not become a bottleneck when many events fire rapidly. | Event queue size stays < 50; dropped events < 1 %. | Using custom interceptor, observe queue length during 100‑user simulation. |
| 72 | A/B test framework overhead | If the purchase flow is gated by a feature flag, the flag resolution should add < 50 ms overhead. | Measure time from app start to flag evaluation. | Using Firebase Remote Config, flag fetch adds 12 ms. |
How SUSA covers performance & load:
SUSA records timestamps for each UI transition and network call, producing a waterfall chart that highlights latency spikes. The platform can also emulate different network conditions via its built‑in throttling profile and capture CPU usage through periodic top snapshots. By running the flow with the “impatient” persona (which attempts to rush through steps) and the “power‑user” persona (which repeats the flow rapidly), SUSA surfaces performance regressions that might be missed in manual exploratory testing.
Subscription Purchase Testing Checklist (2026) – Release Readiness & Monitoring
Even after a feature passes functional tests, release readiness involves observability, rollback mechanisms, and communication with stakeholders. The checklist ensures you can detect and respond to issues in production quickly.
| # | Test Item | Description | Pass Criteria | Example |
|---|---|---|---|---|
| 73 | Feature flag coverage | The subscription purchase flow is behind a toggle that can be disabled instantly without redeploy. | Flipping the flag off in config returns users to the old flow or shows a maintenance banner. | Using LaunchDarkly, set subscription_v2 to false; users see legacy purchase screen. |
| 74 | Canary release metrics | When releasing to 5 % of users, monitor key metrics: conversion rate, error rate, and avg. latency. | No statistically significant degradation vs. baseline (p > 0.05). | Canary shows conversion 4.2 % vs. baseline 4.3 % (overlap in CI). |
| 75 | Alert thresholds | Define alerts for: purchase failure rate > 2 %, average latency > 5 s, or entitlement grant lag > 10 s. | Alerts fire within 30 s of condition breach; notifications routed to on‑call via PagerDuty/Slack. | Simulating a gateway latency spike triggers PagerDuty alert after 28 s. |
| 76 | Dashboard visibility | A real‑time dashboard displays: active subscriptions, renewal attempts, refunds, and failed payments. | Dashboard updates within 5 seconds of event ingestion; no missing data points. | Grafana panel shows subscription count rising in real time as test users purchase. |
| 77 | Automated rollback test | In a staging environment, simulate a faulty release (e.g., introduce a 500 error on entitlement endpoint) and verify that the rollback restores previous behavior within 2 min. | After rollback, success rate returns to ≥ 99 % within the window. | Using Argo Rollouts, promote bad version, watch failure spike, then rollback; success rebounds. |
| 78 | Compliance evidence generation | The test suite generates artifacts (logs, screenshots, API traces) that can be submitted for auditors (PCI‑DSS, GDPR). | Artifacts are stored immutably for at least 12 months; access logged. | CI job uploads a ZIP to an S3 bucket with Object Lock enabled. |
| 79 | Communication plan | Release notes include a clear description of any changes to the purchase flow, impact on existing subscribers, and required user actions (if any). | Notes reviewed by product, legal, and support before publish. | Release note: “Updated price display to include taxes; no action needed”. |
| 80 | Post‑release smoke test suite | A minimal set of automated checks runs against every production deploy to validate the purchase flow end‑to‑end. | Smoke suite passes in < 2 minutes; any failure blocks further traffic shift. | Smoke test uses Playwright to login, navigate to pricing, attempt purchase with test card, asserts confirmation toast. |
| 81 | Load‑test sign‑off | Prior to major promotional events (e.g., Black Friday), a load‑test must demonstrate the system can handle 5× expected peak traffic. | Test results show ≤ 3 % error rate at target load; capacity headroom ≥ 20 %. |
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