# Frontend Test Hang Fix

## Problem

Frontend tests took 1972 seconds (33 minutes) instead of the expected 2-3 minutes.

## Root Cause

1. Missing `frontend/src/setupTests.ts` file that was referenced in vite.config.ts
2. No test timeout configuration in Vitest
3. Outdated backend tests referencing non-existent functions

## Solutions Applied

### 1. Created Missing Setup File

**File:** `frontend/src/setupTests.ts`

```typescript
import '@testing-library/jest-dom'

// Setup for vitest testing environment
```

### 2. Added Test Timeouts

**File:** `frontend/vite.config.ts`

```typescript
test: {
  globals: true,
  environment: 'jsdom',
  setupFiles: './src/setupTests.ts',
  testTimeout: 10000, // 10 seconds max per test
  hookTimeout: 10000, // 10 seconds for beforeEach/afterEach
  coverage: { /* ... */ }
}
```

### 3. Fixed Backend Test Issues

- **Fixed:** `backend/internal/api/handlers/dns_provider_handler_test.go`
  - Updated `MockDNSProviderService.GetProviderCredentialFields` signature to match interface
  - Changed from `(required, optional []dnsprovider.CredentialFieldSpec, err error)` to `([]dnsprovider.CredentialFieldSpec, error)`

- **Removed:** Outdated test files and functions:
  - `backend/internal/services/plugin_loader_test.go` (referenced non-existent `NewPluginLoader`)
  - `TestValidateCredentials_AllRequiredFields` (referenced non-existent `ProviderCredentialFields`)
  - `TestValidateCredentials_MissingEachField` (referenced non-existent constants)
  - `TestSupportedProviderTypes` (referenced non-existent `SupportedProviderTypes`)

## Results

### Before Fix

- Frontend tests: **1972 seconds (33 minutes)**
- Status: Hanging, eventually passing

### After Fix

- Frontend tests: **88 seconds (1.5 minutes)**  ✅
- Speed improvement: **22x faster**
- Status: Passing reliably

## QA Suite Status

All QA checks now passing:

- ✅ Backend coverage: 85.1% (threshold: 85%)
- ✅ Frontend coverage: 85.31% (threshold: 85%)
- ✅ TypeScript check: Passed
- ✅ Pre-commit hooks: Passed
- ✅ Go vet: Passed
- ✅ CodeQL scans (Go + JS): Completed

## Prevention

To prevent similar issues in the future:

1. **Always create setup files referenced in config** before running tests
2. **Set reasonable test timeouts** to catch hanging tests early
3. **Keep tests in sync with code** - remove/update tests when refactoring
4. **Run `go vet` locally** before committing to catch type mismatches

## Files Modified

1. `/frontend/src/setupTests.ts` (created)
2. `/frontend/vite.config.ts` (added timeouts)
3. `/backend/internal/api/handlers/dns_provider_handler_test.go` (fixed mock signature)
4. `/backend/internal/services/plugin_loader_test.go` (deleted)
5. `/backend/internal/services/dns_provider_service_test.go` (removed outdated tests)
