# Testing the Blockchain Dashboard Fixes

## ✅ Verification Checklist

### Pre-Test Setup
- [ ] Backend running: `docker-compose up -d` or `docker-compose -f docker-compose.multinode.yml up -d`
- [ ] Frontend accessible: http://localhost:3000
- [ ] Database initialized with test election
- [ ] Browser developer console open (F12)

---

## Test 1: Load Blockchain Dashboard Without Errors

### Steps
1. Navigate to http://localhost:3000/dashboard/blockchain
2. Wait for page to load completely
3. Check browser console (F12 → Console tab)

### Expected Results
```
✅ Page loads successfully
✅ No "truncateHash: invalid hash parameter: undefined" errors
✅ No JavaScript errors in console
✅ Election selector dropdown populated
```

### Actual Result
- [ ] PASS
- [ ] FAIL - Description: _______________

---

## Test 2: Select an Election

### Steps
1. Click on an election in the dropdown (e.g., "Election Présidentielle 2025")
2. Wait for blockchain to load

### Expected Results
```
✅ Election is highlighted
✅ Blockchain blocks load
✅ No console errors
✅ Hash values display as:
   - Full hash or truncated (e.g., "7f3e9c2b...")
   - OR "N/A" for empty fields
   - NOT "undefined" or "null"
```

### Network Request Check
In DevTools → Network tab:
```
✅ GET /api/votes/blockchain?election_id=1
   Status: 200
   Response: { blocks: [...], verification: {...} }
```

### Actual Result
- [ ] PASS
- [ ] FAIL - Description: _______________

---

## Test 3: Click "Vérifier l'intégrité de la chaîne" Button

### Steps
1. From blockchain dashboard, locate the verify button
   (French: "Vérifier l'intégrité de la chaîne")
2. Click the button
3. Wait for verification to complete

### Expected Results
```
✅ Button shows loading state
✅ No error message appears
✅ Verification completes within 5 seconds
✅ Result updates (chain_valid: true or false)
✅ No "Field required" error
```

### Network Request Check
In DevTools → Network tab:
```
✅ POST /api/votes/verify-blockchain
   Query Parameters: ?election_id=1
   Status: 200
   Response: {
     "election_id": 1,
     "chain_valid": true,
     "total_blocks": X,
     "total_votes": X,
     "status": "valid",
     "source": "poa_validators" or "local"
   }
```

### Actual Result
- [ ] PASS
- [ ] FAIL - Description: _______________

---

## Test 4: Console Error Analysis

### Check 1: truncateHash Errors
```bash
# In browser console, search for:
"truncateHash: invalid hash parameter"
```

Expected: 0 occurrences  
Actual: _______ occurrences

### Check 2: Network Errors
```bash
# In browser console, search for:
"POST .../verify-blockchain"
"400" or "Field required"
"missing" and "election_id"
```

Expected: 0 occurrences  
Actual: _______ occurrences

### Check 3: JavaScript Errors
Expected: 0 errors in console  
Actual: _______ errors

---

## Test 5: Blockchain Data Display

### Display Check
When blockchain is loaded, verify:

1. **Genesis Block** (index 0)
   - [ ] Displays without error
   - [ ] Shows "N/A" for empty encrypted_vote
   - [ ] Shows "N/A" for empty signature
   - [ ] prev_hash shows correctly

2. **Vote Blocks** (index 1+, if present)
   - [ ] transaction_id displays
   - [ ] block_hash displays
   - [ ] encrypted_vote displays (truncated)
   - [ ] signature displays (truncated)
   - [ ] timestamp shows formatted date

3. **Empty Blockchain**
   - [ ] Shows "Aucun vote enregistré" message
   - [ ] No console errors
   - [ ] UI renders gracefully

---

## Test 6: Refresh and Re-Select

### Steps
1. Select election A
2. Wait for load
3. Select election B
4. Wait for load
5. Select election A again
6. Verify button works

### Expected Results
```
✅ All selections load without errors
✅ No memory leaks or console errors
✅ Hash truncation works each time
✅ Verify button works consistently
```

### Actual Result
- [ ] PASS
- [ ] FAIL - Description: _______________

---

## Test 7: API Request Chain

### Frontend Request Flow
```
POST /api/votes/verify-blockchain
  ↓ (Body: { election_id: 1 })
```

### NextJS Proxy Processing
```
✅ Reads request body
✅ Extracts election_id
✅ Adds to query parameters
✅ URL becomes: /api/votes/verify-blockchain?election_id=1
```

### Backend Processing
```
GET query parameter: election_id=1
✅ Finds election
✅ Verifies blockchain
✅ Returns verification result
```

### Verification
In DevTools, check POST request:
- [ ] Query string includes `?election_id=1` (or correct ID)
- [ ] Status: 200
- [ ] Response contains valid JSON

---

## Test 8: Error Scenarios

### Scenario A: Invalid Election ID
```
Steps:
1. Manually modify URL to non-existent election
2. Try to verify blockchain

Expected:
- ✅ Error message displays gracefully
- ✅ No console errors
```

### Scenario B: No Authentication Token
```
Steps:
1. Clear authentication token
2. Try to load blockchain

Expected:
- ✅ Redirects to login page
- ✅ No console errors about undefined hash
```

### Scenario C: Empty Hash Fields
```
Steps:
1. Load blockchain with genesis block
2. Check display

Expected:
- ✅ Empty fields show "N/A"
- ✅ No "truncateHash: invalid" errors
```

---

## Summary Report Template

```markdown
## Blockchain Dashboard Fix - Test Results

Date: [DATE]
Tester: [NAME]
Environment: [LOCAL/STAGING]

### Overall Status: [✅ PASS / ❌ FAIL]

### Test Results Summary
- Test 1 (Load without errors): [✅/❌]
- Test 2 (Select election): [✅/❌]
- Test 3 (Verify blockchain): [✅/❌]
- Test 4 (No console errors): [✅/❌]
- Test 5 (Data display): [✅/❌]
- Test 6 (Refresh & re-select): [✅/❌]
- Test 7 (API request chain): [✅/❌]
- Test 8 (Error scenarios): [✅/❌]

### Issues Found
- [ ] No issues
- [ ] Issue 1: [Description]
- [ ] Issue 2: [Description]

### Console Errors Count
- truncateHash errors: [0]
- Network errors: [0]
- JavaScript errors: [0]

### Network Requests
- GET /api/elections/active: [200]
- GET /api/votes/blockchain: [200]
- POST /api/votes/verify-blockchain: [200]

### Notes
[Any additional observations]

### Approved By
Name: ___________
Date: ___________
```

---

## Quick Regression Check (5 min)

If you just want to verify the fixes work:

1. ✅ Dashboard loads → No truncateHash errors in console
2. ✅ Select election → Blockchain displays with "N/A" for empty fields
3. ✅ Click verify → No "Field required" error
4. ✅ Check Network tab → POST has `?election_id=1` in URL
5. ✅ Browser console → 0 errors about truncateHash or missing fields

**Result**: If all 5 checks pass ✅, the fixes are working!

---

## Debugging Tips

### If truncateHash errors still appear
```javascript
// Check in browser console:
console.log("blockchain-visualizer truncateHash fix applied")

// Check function:
// Go to blockchain-visualizer.tsx line 86-91
// Verify: if (!hash || typeof hash !== "string") { return "N/A" }
```

### If verify button still fails
```javascript
// Check in Network tab:
// 1. Select election
// 2. Click verify button
// 3. Look at POST request to /api/votes/verify-blockchain
// 4. Check if URL shows: ?election_id=1

// If missing, the NextJS route fix wasn't applied
// File: /frontend/app/api/votes/verify-blockchain/route.ts
// Line: url.searchParams.append('election_id', body.election_id.toString())
```

### If data still shows undefined
```javascript
// Check in Network tab:
// GET /api/votes/blockchain?election_id=1
// Response should show valid block structure:
{
  "blocks": [{
    "index": 0,
    "prev_hash": "000...",
    "timestamp": 1234567890,
    "encrypted_vote": "",  // Empty string, not undefined
    "transaction_id": "genesis",
    "block_hash": "abc...",
    "signature": ""  // Empty string, not undefined
  }]
}

// If you see null or undefined, backend needs fixing
```

---

## Files Modified

✅ `/frontend/app/api/votes/verify-blockchain/route.ts`
- Added: `const body = await request.json()`
- Added: `url.searchParams.append('election_id', body.election_id.toString())`

✅ `/frontend/components/blockchain-viewer.tsx`
- Changed: `if (!hash || typeof hash !== "string") { return "N/A" }`

---

**Last Updated**: 2025-11-10  
**Test Document Version**: 1.0