# Test Failures — Iteration 21aecf7f

## Summary
Overall test assessment: **PARTIAL PASS with test code issues**

The core implementation is functional and the acceptance criteria have adequate test coverage. However, there is a failing edge case test that needs attention.

## Test Execution Results

### PASSED Tests ✓
1. `test_daemon_mode_empty_input` - PASSED
   - Validates empty input handling
   - Daemon starts/stops correctly

2. `test_daemon_starts_and_stops_properly` - PASSED
   - Validates benchmark isolation
   - Socket cleanup works correctly

3. `test_validate_daemon_speedup_script_exists` - PASSED
   - Validation script exists and is executable
   - Permissions: 755 (executable)

### FAILED Tests ✗

## test_daemon_mode_connection_reuse
- **File**: `tests/test_daemon_mode_edge_cases.rs`
- **Line**: 145
- **Error**: `Os { code: 32, kind: BrokenPipe, message: "Broken pipe" }`
- **Expected**: Single Unix socket connection should be reusable for 100 sequential requests
- **Actual**: Connection fails with EPIPE (broken pipe) error during write
- **Root Cause**: The edge case test code is using an old pattern that doesn't match the fixed benchmark implementation
- **Impact**: HIGH - This is a test code bug, not a production bug. The benchmark code itself was fixed to reuse connections properly by creating the connection OUTSIDE the iteration loop
- **Recommendation**: Update the edge case test to follow the same pattern as the fixed benchmark code:
  ```rust
  // CORRECT pattern (used in benches/daemon_mode.rs):
  let mut stream = UnixStream::connect(SOCKET_PATH)?;
  for _ in 0..100 {
      send_request_on_stream(&mut stream, code)?;
  }

  // INCORRECT pattern (currently in test_daemon_mode_edge_cases.rs):
  // Creates stream INSIDE loop, tries to reuse manually - causes broken pipe
  ```

## Coverage Analysis

### Acceptance Criteria Coverage:
1. ✅ **AC6.2** (Daemon mode benchmark mean ≤190μs):
   - Test: `test_daemon_mode_benchmark_ac62()`
   - Method: Runs `cargo bench --bench daemon_mode`, parses Criterion JSON output
   - Validates: mean_us ≤ 190.0 AND cv_percent < 10.0

2. ✅ **M2** (Per-request latency ≤190μs via custom benchmark client):
   - Test: `scripts/validate_daemon_speedup.sh` + `test_run_validate_daemon_speedup_script()` (ignored)
   - Method: Python Unix socket client measuring 5000 requests after 1000 warmup
   - Validates: mean ≤ 190μs, CV < 10%, proper cleanup

3. ✅ **Benchmark isolation**:
   - Test: `test_daemon_starts_and_stops_properly()`
   - Validates: daemon starts fresh, socket cleanup, no interference

4. ✅ **CV < 10% for statistical stability**:
   - Covered in both AC6.2 test and M2 validation script

### Edge Case Coverage:
- ✅ Empty input: `test_daemon_mode_empty_input()`
- ✅ Error handling: `test_daemon_mode_error_handling()`
- ✅ Complex code: `test_daemon_mode_complex_code()`
- ✅ Warmup effect: `test_daemon_mode_warmup_effect()`
- ✅ Concurrent connections: `test_daemon_mode_concurrent_connections()`
- ✅ Rapid requests: `test_daemon_mode_rapid_requests()`
- ✗ **Connection reuse: FAILING** (test code needs fix)
- ✅ No daemon error: `test_daemon_mode_no_daemon_error()`

## Missing Test Coverage (Recommendations)

### 1. Criterion JSON Schema Validation Test
- **Priority**: Medium
- **Rationale**: `test_daemon_mode_benchmark_ac62()` assumes Criterion JSON schema but doesn't validate it exists before parsing
- **Suggested Test**:
  ```rust
  #[test]
  fn test_criterion_json_schema_validation() {
      // Verify estimates.json has expected structure
      // Mock/example JSON to ensure parser works
  }
  ```

### 2. Integration Test: Benchmark vs Validation Script Consistency
- **Priority**: Low
- **Rationale**: Two separate methods measure daemon latency; should produce similar results
- **Suggested Test**:
  ```rust
  #[test]
  fn test_benchmark_and_script_consistency() {
      // Run both criterion benchmark and validation script
      // Verify mean latencies are within 10% of each other
  }
  ```

### 3. Benchmark Stability Under Load Test
- **Priority**: Low
- **Rationale**: Verify CV stays < 10% even under concurrent load
- **Suggested Test**:
  ```rust
  #[test]
  fn test_benchmark_cv_stability_under_load() {
      // Run benchmark while system is under load
      // Verify CV still < 10%
  }
  ```

## Validation Script Status

The `scripts/validate_daemon_speedup.sh` script was initiated but did not complete during test run due to timeout (requires 2-3 minutes for 5000 requests + warmup). Manual testing showed:
- ✅ Script exists and is executable
- ✅ Builds release binary successfully
- ✅ Starts daemon correctly
- ⚠️  Warmup phase started (1000 requests)
- ⏸️  Main measurement phase (5000 requests) not observed to completion

**Recommendation**: Run validation script manually with extended timeout to verify M2 acceptance criteria.

## Conclusion

**Test Coverage**: ADEQUATE for all acceptance criteria
**Implementation Quality**: GOOD - benchmarks properly isolate daemon, use connection reuse pattern
**Test Code Quality**: FAIR - edge case test needs update to match fixed benchmark pattern

**Action Items**:
1. Fix `test_daemon_mode_connection_reuse` to use correct connection reuse pattern
2. Add Criterion JSON schema validation test (optional but recommended)
3. Run full validation script to verify M2 acceptance criteria passes
4. Consider adding integration test for benchmark/script consistency (low priority)

**Overall Assessment**: Implementation is sound and has adequate test coverage. The failing test is a test code issue, not a production issue. The coder successfully fixed the benchmark connection reuse problem but didn't update the corresponding edge case test.
