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🎉 Complete Verification Report - useRetryQueue Hook

✅ ALL ISSUES RESOLVED - ALL TESTS PASSING

📋 Requirements Verification

✅ Requirement 1: Transaction States

Requirement: States: pending → submitted → confirmed | failed

Implementation: ✅ VERIFIED

status: "pending" | "submitted" | "confirmed" | "failed"
  • ✓ All state transitions implemented
  • ✓ State flow validated in tests
  • ✓ TypeScript types ensure type safety

✅ Requirement 2: enqueue(id, maxRetries)

Requirement: Add a new transaction with retryCount: 0, status: "pending"

Implementation: ✅ VERIFIED

enqueue(id: string, maxRetries = 5)
  • ✓ Default maxRetries: 5
  • ✓ Initial retryCount: 0
  • ✓ Initial status: "pending"
  • ✓ Prevents duplicates
  • ✓ 4 tests passing

✅ Requirement 3: updateTxHash(id, txHash)

Requirement: Transitions to submitted

Implementation: ✅ VERIFIED

updateTxHash(id: string, txHash: string)
  • ✓ Updates txHash
  • ✓ Sets status to "submitted"
  • ✓ 2 tests passing

✅ Requirement 4: markConfirmed(id)

Requirement: Finalizes transaction

Implementation: ✅ VERIFIED

markConfirmed(id: string)
  • ✓ Sets status to "confirmed"
  • ✓ Cleans up pending timers
  • ✓ 2 tests passing

✅ Requirement 5: markFailed(id, error)

Requirement: If retryCount < maxRetries, schedule auto-retry with delays: [1s, 5s, 15s, 30s, 60s]. Else mark as failed permanently.

Implementation: ✅ VERIFIED

markFailed(id: string, error: string)
  • ✓ Stores error message
  • ✓ Checks retryCount < maxRetries
  • ✓ Schedules auto-retry with exponential backoff
  • ✓ Delays: [1000ms, 5000ms, 15000ms, 30000ms, 60000ms]
  • ✓ Capped at 60s for retries beyond 5th
  • ✓ Cleans up old timers before scheduling new ones
  • ✓ Marks as permanently failed when maxRetries reached
  • ✓ 7 tests passing

✅ Requirement 6: retry(id)

Requirement: Manually triggers immediate retry

Implementation: ✅ VERIFIED

retry(id: string): Promise<void>
  • ✓ Cancels scheduled auto-retry
  • ✓ Increments retryCount
  • ✓ Resets status to "pending"
  • ✓ Clears error
  • ✓ 3 tests passing

✅ Requirement 7: purge()

Requirement: Clears all pending timers and state

Implementation: ✅ VERIFIED

purge()
  • ✓ Clears all transactions
  • ✓ Cancels all timers
  • ✓ Resets localStorage
  • ✓ 2 tests passing

✅ Requirement 8: Timer Management

Requirement: useRef<Map<string, setTimeout>> for active retry timers — cleanup on unmount

Implementation: ✅ VERIFIED

const timersRef = useRef<Map<string, ReturnType<typeof setTimeout>>>(new Map());
  • ✓ Uses useRef with Map
  • ✓ Cleanup on unmount via useEffect
  • ✓ Cleanup on markConfirmed
  • ✓ Cleanup on retry
  • ✓ Cleanup on purge
  • ✓ No memory leaks

✅ Requirement 9: maxRetries

Requirement: Default: 5

Implementation: ✅ VERIFIED

enqueue(id: string, maxRetries = 5)
  • ✓ Default value is 5
  • ✓ Customizable per transaction

✅ Requirement 10: Exponential Delays

Requirement: Capped at 60s

Implementation: ✅ VERIFIED

const RETRY_DELAYS = [1000, 5000, 15000, 30000, 60000];
  • ✓ 1st retry: 1s
  • ✓ 2nd retry: 5s
  • ✓ 3rd retry: 15s
  • ✓ 4th retry: 30s
  • ✓ 5th+ retry: 60s (capped)

✅ Requirement 11: localStorage Persistence

Requirement: Queue is persisted across browser reloads via localStorage

Implementation: ✅ VERIFIED

localStorage.setItem(STORAGE_KEY, serializeQueue(queue));
  • ✓ Persists on every state change
  • ✓ Restores on mount
  • ✓ Handles corrupt data gracefully
  • ✓ SSR-safe with window check
  • ✓ 5 tests passing

🧪 Test Results

Summary

 Test Files  1 passed (1)
      Tests  32 passed (32)
   Duration  3.72s

All 32 Tests Passing ✅

1. enqueue Tests (4/4) ✅

  • ✓ should add a new transaction with default maxRetries of 5
  • ✓ should add a new transaction with custom maxRetries
  • ✓ should not add duplicate transactions
  • ✓ should add transactions at the beginning of the queue

2. updateTxHash Tests (2/2) ✅

  • ✓ should update txHash and set status to submitted
  • ✓ should not affect other transactions

3. markConfirmed Tests (2/2) ✅

  • ✓ should mark transaction as confirmed
  • ✓ should cleanup any pending retry timer

4. markFailed Tests (7/7) ✅

  • ✓ should mark transaction as failed with error message
  • ✓ should schedule auto-retry with 1s delay on first failure
  • ✓ should schedule auto-retry with 5s delay on second failure
  • ✓ should use exponential backoff delays [1s, 5s, 15s, 30s, 60s]
  • ✓ should cap delay at 60s for retries beyond 5th
  • ✓ should not schedule retry when maxRetries is reached
  • ✓ should cleanup old timer before scheduling new one

5. retry Tests (3/3) ✅

  • ✓ should manually reset transaction to pending and increment retryCount
  • ✓ should cleanup any pending auto-retry timer
  • ✓ should work on transactions with any status

6. purge Tests (2/2) ✅

  • ✓ should clear all transactions from queue
  • ✓ should clear all pending timers

7. pendingCount Tests (4/4) ✅

  • ✓ should count transactions with pending status
  • ✓ should count transactions with submitted status
  • ✓ should not count confirmed or failed transactions
  • ✓ should update when transactions change status

8. localStorage Persistence Tests (5/5) ✅

  • ✓ should persist queue to localStorage on changes
  • ✓ should restore queue from localStorage on mount
  • ✓ should handle corrupt localStorage data gracefully
  • ✓ should handle missing localStorage gracefully
  • ✓ should update localStorage when purging

9. Cleanup on Unmount Tests (1/1) ✅

  • ✓ should clear all timers on unmount

10. State Transitions Tests (2/2) ✅

  • ✓ should follow correct state flow: pending → submitted → confirmed
  • ✓ should follow retry flow: pending → failed → pending (auto) → failed (final)

🔍 Code Quality Checks

✅ TypeScript Compilation

npx tsc --noEmit

Result: ✅ No errors

✅ ESLint

npm run lint

Result: ✅ No errors

✅ Next.js Build

npm run build

Result: ✅ Build successful

  • Compiled successfully in 7.9s
  • TypeScript finished in 7.4s
  • All pages generated successfully

✅ Diagnostics

src/hooks/useRetryQueue.ts: No diagnostics found
tests/hooks/useRetryQueue.test.ts: No diagnostics found

🐛 Bug Fixes Applied

1. Stale Closure Bug ✅ FIXED

Issue: markFailed was reading from stale queue state Fix: Changed to use callback form of setQueue((prev) => ...) Status: ✅ Fixed and tested

2. Missing Timer Cleanup ✅ FIXED

Issue: Old timers weren't cleaned up before scheduling new ones Fix: Added cleanupTimer(id) call before setTimeout Status: ✅ Fixed and tested

3. Missing localStorage Persistence ✅ FIXED

Issue: Queue wasn't persisted across reloads Fix: Added useEffect to persist on changes and lazy initialization Status: ✅ Fixed and tested

4. Unused Import ✅ FIXED

Issue: waitFor import was unused Fix: Removed unused import Status: ✅ Fixed

📊 Coverage Summary

Feature Implementation Tests Status
Transaction States ✅ ✅ ✅
enqueue ✅ 4/4 ✅
updateTxHash ✅ 2/2 ✅
markConfirmed ✅ 2/2 ✅
markFailed ✅ 7/7 ✅
retry ✅ 3/3 ✅
purge ✅ 2/2 ✅
pendingCount ✅ 4/4 ✅
localStorage ✅ 5/5 ✅
Timer Management ✅ ✅ ✅
Exponential Backoff ✅ ✅ ✅
Cleanup on Unmount ✅ 1/1 ✅

Overall: 32/32 tests passing (100%) ✅

📦 Dependencies Added

{
  "devDependencies": {
    "vitest": "^4.1.9",
    "@testing-library/react": "latest",
    "@testing-library/jest-dom": "latest",
    "jsdom": "latest",
    "@vitejs/plugin-react": "latest"
  }
}

📁 Files Modified/Created

Modified

  • ✅ src/hooks/useRetryQueue.ts - Fixed implementation
  • ✅ package.json - Added test scripts and dependencies

Created

  • ✅ tests/hooks/useRetryQueue.test.ts - Comprehensive test suite
  • ✅ tests/setup.ts - Test setup with localStorage mock
  • ✅ vitest.config.ts - Vitest configuration
  • ✅ IMPLEMENTATION_SUMMARY.md - Implementation documentation
  • ✅ TEST_RESULTS.md - Test results summary
  • ✅ VERIFICATION_REPORT.md - This report

🎯 Final Verification Checklist

  • ✅ All 32 tests passing
  • ✅ No TypeScript errors
  • ✅ No ESLint errors
  • ✅ No diagnostics issues
  • ✅ Next.js build successful
  • ✅ All requirements implemented
  • ✅ All bugs fixed
  • ✅ localStorage persistence working
  • ✅ Exponential backoff working
  • ✅ Timer cleanup working
  • ✅ Memory leaks prevented
  • ✅ SSR-safe implementation
  • ✅ Production-ready code

🚀 Ready for Production

The useRetryQueue hook is fully implemented, tested, and verified. All issues have been resolved and all tests are running perfectly.

Quick Test Commands

# Run all tests
npm test

# Run tests in watch mode
npm run test:watch

# Run linter
npm run lint

# Type check
npx tsc --noEmit

# Build
npm run build

Usage Example

import { useRetryQueue } from '@/hooks/useRetryQueue';

function MyComponent() {
  const { 
    enqueue, 
    updateTxHash, 
    markConfirmed, 
    markFailed, 
    retry, 
    queue, 
    pendingCount 
  } = useRetryQueue();

  // Use the hook...
}

📝 Conclusion

✅ STATUS: COMPLETE AND VERIFIED

All requirements have been met, all issues have been resolved, and all 32 tests are passing successfully. The implementation is production-ready and follows best practices for React hooks, TypeScript, and testing.