# Resilience & Performance Tests

**Task**: 05_test_resilience_perf
**Name**: Resilience & Performance Tests
**Description**: Implement resilience tests (dependency failure) and performance latency tests
**Complexity**: 3 points
**Dependencies**: 01_test_infrastructure, 02_test_health_auth
**Component**: Blackbox Tests
**Tracker**: pending
**Epic**: pending

## Problem

No tests verify system behavior when external dependencies fail, or baseline performance characteristics.

## Outcome

- API unavailable during login returns error (NFT-RES-01)
- CDN unavailable during download returns error (NFT-RES-02)
- Docker daemon unavailable during unlock reports error state (NFT-RES-03)
- Health endpoint meets latency threshold (NFT-PERF-01)

## Scope

### Included
- NFT-RES-01: API unavailable during login
- NFT-RES-02: CDN unavailable during resource download
- NFT-RES-03: Docker daemon unavailable during unlock
- NFT-PERF-01: Health endpoint latency
- NFT-PERF-02: Login latency
- NFT-PERF-03: Resource download latency

### Excluded
- Blackbox functional tests (covered in other tasks)
- NFT-SEC-03 (hardware-bound key test — complex mock setup, tracked separately)

## Acceptance Criteria

**AC-1: API failure handled gracefully**
Given the mock API is stopped
When POST /login is called
Then HTTP 401 with error detail

**AC-2: CDN failure handled gracefully**
Given logged in but mock CDN is stopped
When POST /load/testmodel is called
Then HTTP 500 with error detail

**AC-3: Docker failure reported in unlock state**
Given Docker socket not mounted
When POST /unlock and poll status
Then state transitions to "error" with failure description

**AC-4: Health latency within threshold**
Given the loader is running
When 100 sequential GET /health requests are sent
Then p95 latency ≤ 100ms

## Blackbox Tests

| AC Ref | Initial Data/Conditions | What to Test | Expected Behavior | NFR References |
|--------|------------------------|-------------|-------------------|----------------|
| AC-1 | Mock API stopped | POST /login | 401, error | NFT-RES-01 |
| AC-2 | CDN stopped, no local cache | POST /load | 500, error | NFT-RES-02 |
| AC-3 | No Docker socket | POST /unlock + poll | error state | NFT-RES-03 |
| AC-4 | Normal operation | 100x GET /health | p95 ≤ 100ms | NFT-PERF-01 |