# Resilience Tests

### NFT-RES-01: API unavailable during login

**Summary**: Verify the system returns an error when the upstream API is unreachable.
**Traces to**: AC-2 (negative), AC-3
**Category**: External dependency failure

**Preconditions**: Loader service is running; mock API is stopped.

**Steps**:

| Step | Consumer Action | Expected System Response |
|------|----------------|------------------------|
| 1 | POST /login with valid credentials | HTTP 401, body has `"detail"` field with connection error |

**Expected outcome**: HTTP 401 with error message indicating API unreachable

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### NFT-RES-02: CDN unavailable during resource download

**Summary**: Verify the system returns an error when CDN is unreachable and no local cache exists.
**Traces to**: AC-4 (negative)
**Category**: External dependency failure

**Preconditions**: Logged in; mock CDN is stopped; no local `.big` file cached.

**Steps**:

| Step | Consumer Action | Expected System Response |
|------|----------------|------------------------|
| 1 | POST /load/testmodel | HTTP 500, body has `"detail"` field |

**Expected outcome**: HTTP 500 indicating CDN download failure

---

### NFT-RES-03: Docker daemon unavailable during unlock

**Summary**: Verify unlock reports error when Docker daemon is not accessible.
**Traces to**: AC-9 (negative)
**Category**: External dependency failure

**Preconditions**: Docker socket not mounted / daemon stopped; encrypted archive exists.

**Steps**:

| Step | Consumer Action | Expected System Response |
|------|----------------|------------------------|
| 1 | POST /unlock with valid credentials | HTTP 200 (background task starts) |
| 2 | Poll GET /unlock/status | State transitions to "error", error field describes Docker failure |

**Expected outcome**: unlock_state = "error" with CalledProcessError detail