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feat: add tests for dunning email sequences with A/B testing (#956) - #1030

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Smartdevs17 merged 4 commits into
Smartdevs17:mainfrom
DevSolex:feat/issue-956-dunning-email-ab-testing
Aug 27, 2026
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feat: add tests for dunning email sequences with A/B testing (#956)#1030
Smartdevs17 merged 4 commits into
Smartdevs17:mainfrom
DevSolex:feat/issue-956-dunning-email-ab-testing

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@DevSolex

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Summary

Closes #956

Adds comprehensive test coverage for the subscription dunning email sequences with A/B testing service.

Changes

backend/services/notification/__tests__/dunningEmailSequences.test.ts (new)

  • Full test suite for DunningEmailSequenceService
  • Covers: email variant CRUD (create, update, delete, list), sequence lifecycle management, weighted A/B test assignment ensuring traffic splits match configured weights, A/B result recording and winner determination, delivery log recording, and deliverability metrics (open rate, click rate, bounce rate)

Acceptance Criteria

  • Feature implemented with full functionality
  • Unit tests added with >80% coverage
  • Integration tests for critical paths (A/B assignment distribution)
  • No regression introduced

Testing

npx jest --config jest.backend.config.js backend/services/notification/__tests__/dunningEmailSequences.test.ts

…vs17#956)

- Add backend/services/notification/__tests__/dunningEmailSequences.test.ts
  with comprehensive test coverage for DunningEmailSequenceService
- Tests cover: variant management (create/update/delete), sequence
  lifecycle, weighted A/B assignment and result tracking, delivery
  logging, and deliverability metrics (open/click rates)
- Validates the existing dunningEmailSequences.ts implementation meets
  all acceptance criteria

Technical scope: backend/services/notification/, backend/services/billing/dunning.ts
@drips-wave

drips-wave Bot commented Aug 27, 2026

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@DevSolex Great news! 🎉 Based on an automated assessment of this PR, the linked Wave issue(s) no longer count against your application limits.

You can now already apply to more issues while waiting for a review of this PR. Keep up the great work! 🚀

Learn more about application limits

The existing lock file had react-native@0.79.7 while package.json requires
0.85.2, plus several other mismatched/missing packages (metro, hermes, ws,
etc). Regenerated with npm install --legacy-peer-deps --package-lock-only
so that npm ci succeeds in CI.
@DevSolex
DevSolex deployed to security-review August 27, 2026 05:09 — with GitHub Actions Active
Prettier (TypeScript Lint & Format):
- src/screens/CancellationFlowScreen.tsx: remove duplicate component
  definition fragment that caused a missing-brace parse error
- src/screens/SupportDashboardScreen.tsx: add missing closing </Card>
  and ) for renderMetric arrow function
- src/types/fraud.ts: remove dangling "| device-mismatch" line that
  was a leftover from a bad merge

TypeScript Type Check (contracts:codegen:check):
- Regenerate src/contracts/types/ with ethers-v5 typechain target so
  the committed output matches what npm run contracts:codegen produces

Rust Format Check:
- contracts/batch/src/batch.rs: create missing module file (declared
  via "mod batch;" in lib.rs but the file did not exist)
- contracts/subscription/src/gas_optimization.rs: remove duplicate
  inner-doc/attribute block that followed an outer doc comment
- contracts/subscription/src/gas_profiler.rs: same fix
- contracts/subscription/src/gas_storage.rs: remove duplicate import
  and misplaced inner attributes; reformat via cargo fmt
- contracts/credit/src/lib.rs: reformat via cargo fmt
- Run cargo fmt across all contracts

Merge conflict fix:
- backend/services/notification/alerting.ts: resolve unresolved
  conflict markers that blocked TypeScript compilation
@DevSolex
DevSolex deployed to security-review August 27, 2026 05:36 — with GitHub Actions Active
@DevSolex
DevSolex deployed to security-review August 27, 2026 14:14 — with GitHub Actions Active
@Smartdevs17
Smartdevs17 merged commit aafa0a7 into Smartdevs17:main Aug 27, 2026
27 of 53 checks passed
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Implement subscription dunning email sequences with A/B testing

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