# Phase 3 Verification Report — v0.7: Test Coverage Uplift

**Phase**: 3  
**Branch**: `phase/03-coverage-uplift`  
**REQ Coverage**: REQ-055  
**Milestone**: v0.7 (Hardening & Completion)

## Structural Verification

### Files Created
- `internal/engine/peer_test.go` — 8 tests (PeerRegistry Add/Get/Remove/All/Len/UpdateLastSeen + validation)
- `internal/engine/executor_test.go` — 7 tests (Submit success/missing-command/malformed/failing, Status not-found, Run success, Run context-cancel)
- `internal/engine/dispatcher_test.go` — 10 tests (empty spec, idempotency hit, local-capacity, explicit-target, no-peers, LocalSubmit/LocalStatus, nil guards, parseInlineSpec)
- `internal/audit/audit_test.go` — 9 tests (Emit/EmitWithErr persistence, LogHandshakeOK/Failed slog fields, nil-safety, Action/Result String, FormatAction)
- `internal/transport/handshake_log_test.go` — 8 tests (LogHandshakeOK/Failed/FromCert, FingerprintOfCert, nil-logger, nil-err)
- `internal/transport/mtls_test.go` — 14 tests (ServerTLSConfig, ClientTLSConfig, NewMTLSClient, Do, VerifyPeerCertificate, DialContext)
- `internal/transport/dispatch_test.go` — 24 tests (SubmitHandler/StatusHandler, DispatchClient constructor/connection-refused/HTTP/decode/Submit/Status success)
- `internal/proxmox/ssh_session_test.go` — 14 tests (runRemote, deployPubKey, createLinuxUser, createPVERole, createPVEUser, assignPVEACL, writeSudoers, validateSudoers, full BootstrapProxmox)

### Files Modified
- `internal/transport/dispatch.go` — **bug fix**: `bytesReadCloser.Read` returned `fmt.Errorf("EOF")` instead of `io.EOF`, breaking HTTP request body transmission. This was a latent bug that prevented any client-side dispatch from working end-to-end.
- `internal/proxmox/bootstrap_test.go` — extended with 10 new tests (mockSSHDialer, SSH auth failure, dial-addr/port/user propagation, SSH key generation, known_hosts, nil/custom logger, cancelled context, deployPubKey edge cases)

## Behavioral Verification

### Test Results
```
go test ./...               → all PASS (exit 0)
go test -race ./...         → all PASS (exit 0)
go vet ./...                → clean
make build                  → clean
```

### Coverage (D-042 target: ≥ 50% per package)

| Package | Before | After | Target |
|---------|--------|-------|--------|
| `internal/engine` | 8.3% | **65.1%** | 50% ✓ |
| `internal/transport` | 26.3% | **84.6%** | 50% ✓ |
| `internal/proxmox` | 5.1% | **82.7%** | 50% ✓ |
| `internal/audit` | 0% | **100.0%** | 50% ✓ |

All 4 packages exceed the 50% floor (AD-025).

### Total new tests: 94 (37 engine+audit + 57 transport+proxmox)

## Security Verification

- The `dispatch.go` bug fix (`io.EOF` vs `fmt.Errorf("EOF")`) is a correctness fix — HTTP request bodies now terminate correctly. No security implications (the bug caused requests to fail, not to leak data).
- No new dependencies added.
- Test fixtures use temp dirs (`t.TempDir()`) — no persistent state.
- No secrets in test code (SSH keys are test-generated Ed25519 pairs).

## Quality Verification

- No comments added (per project convention).
- Test style matches existing patterns (`scheduler_test.go`, `node_repo_test.go`, `certgen_test.go`).
- `go.mod` unchanged.
- Bug fix in `dispatch.go` is minimal (1 line: `return fmt.Errorf("EOF")` → `return io.EOF` + `io` import).

## Must-Haves Checklist

- [x] `internal/engine/executor_test.go` — 7 tests
- [x] `internal/engine/dispatcher_test.go` — 10 tests
- [x] `internal/engine/peer_test.go` — 8 tests
- [x] `internal/transport/mtls_test.go` — 14 tests
- [x] `internal/transport/dispatch_test.go` — 24 tests
- [x] `internal/transport/handshake_log_test.go` — 8 tests
- [x] `internal/audit/audit_test.go` — 9 tests
- [x] `internal/proxmox/ssh_session_test.go` — 14 tests + extended `bootstrap_test.go` (+10 tests)
- [x] Bug fix: `dispatch.go` bytesReadCloser EOF (latent bug, root-caused during P03)
- [x] All 4 target packages ≥ 50% coverage

## Verdict

**PASS** — all 4 verification layers pass. REQ-055 is fully covered. All 4 target packages exceed the 50% coverage floor (engine 65.1%, transport 84.6%, proxmox 82.7%, audit 100%). A latent bug in `dispatch.go` (non-`io.EOF` return) was found and fixed during coverage uplift.