# Test Failures — Iteration 18855b9c

## Status: ALL TESTS PASSING ✅

No test failures detected. All acceptance criteria validated successfully.

## Test Execution Summary

### Benchmark Tests (cargo bench)
- **startup_benchmarks**: 10 benchmarks executed successfully
- **execution_benchmarks**: 10 benchmarks executed successfully
- **Total runtime**: ~20 seconds per suite
- **Exit code**: 0 (success)

### Unit Tests (cargo test --lib)
- **Tests passed**: 308 tests
- **Tests failed**: 0
- **Exit code**: 0 (success)

### Integration Tests (cargo test)
- **benchmark_validation**: 8 tests (NEW - added by QA)
- **test_ast_bytecode**: 7 tests
- **test_benchmark_outputs**: 14 tests
- **test_cross_feature_integration**: 29 tests
- **test_integration_merged_modules**: 19 tests
- **test_performance_constraints**: 18 tests
- **Doc tests**: 10 tests
- **Total**: 413 tests passed

## Acceptance Criteria Validation

### AC1.1: Benchmark suite runs successfully ✅
- **Test**: `cargo bench --bench startup_benchmarks` and `cargo bench --bench execution_benchmarks`
- **Result**: Exit code 0, all benchmarks complete
- **Evidence**:
  - startup_benchmarks.rs: 10 benchmarks (cold start variants)
  - execution_benchmarks.rs: 10 benchmarks (warm execution variants)
  - HTML reports generated in `target/criterion/report/index.html`

### AC1.2: Cold start execution < 100μs mean ✅
- **Test**: Parse `target/criterion/cold_start_simple/new/estimates.json`
- **Result**: Mean = 293.34 ns (0.29 μs) << 100 μs
- **Evidence**: JSON point_estimate: 293.33996772766113 ns
- **Margin**: 99.7% under target (343x faster than requirement)
- **Automated Test**: `test_cold_start_performance_meets_ac12` (PASS)

### AC1.5: Coefficient of variation < 10% ✅
- **Test**: Calculate std_dev / mean from criterion JSON
- **Result**: CV = 1.29% < 10%
- **Evidence**:
  - Mean: 293.34 ns
  - Std Dev: 3.79 ns
  - CV: 0.0129 (1.29%)
- **Automated Test**: `test_benchmark_stability_meets_ac15` (PASS)

### Required Benchmark Coverage ✅
All benchmarks specified in testing strategy are implemented:

1. **cold_start_simple**: '2 + 3' (AC1.2 validation) ✅
2. **cold_start_complex**: '(10 + 20) * 3 / 2' ✅
3. **with_variables**: 'x = 10; y = 20; x + y' ✅
4. **with_print**: 'print(42)' ✅
5. **warm_execution_simple**: Pre-compiled bytecode execution ✅
6. **Additional coverage**: empty program, all operators, nested expressions, floor division, modulo ✅

### Criterion HTML Reports ✅
- **Location**: `target/criterion/report/index.html`
- **Size**: 4.5 KB
- **Status**: Generated successfully
- **Automated Test**: `test_html_reports_generated` (PASS)

## Edge Cases Tested

### QA-Added Edge Case Tests (benchmark_validation.rs)
1. **test_edge_case_empty_program_benchmark**: Validates minimal execution path ✅
2. **test_edge_case_all_operators_benchmark**: Validates comprehensive operator coverage ✅
3. **test_warm_vs_cold_benchmarks_both_exist**: Validates both benchmark types present ✅
4. **test_benchmark_json_schema_valid**: Validates criterion output format ✅
5. **test_all_required_benchmarks_exist**: Validates all specified benchmarks exist ✅

### Existing Edge Case Coverage (from coder)
- **Empty program**: Tests edge case of zero operations
- **Large integers**: Overflow handling
- **Division by zero**: Error path validation
- **Deeply nested expressions**: Parser stress test
- **Undefined variables**: Runtime error propagation
- **Complex multi-statement programs**: Integration testing

## Coverage Assessment

### Acceptance Criteria Coverage: 100%
- ✅ AC1.1: Benchmark suite runs successfully
- ✅ AC1.2: Mean cold start < 100μs (verified via JSON)
- ✅ AC1.5: CV < 10% (verified via JSON)
- ✅ All required benchmarks implemented
- ✅ HTML reports generated
- ✅ Both cold/warm benchmarks present

### Missing Coverage: NONE
All acceptance criteria have corresponding automated tests that validate requirements.

## Performance Summary

| Metric | Target | Actual | Status |
|--------|--------|--------|--------|
| Cold start mean | < 100 μs | 0.29 μs | ✅ PASS (343x better) |
| Coefficient of variation | < 10% | 1.29% | ✅ PASS |
| Benchmark suite runs | Exit 0 | Exit 0 | ✅ PASS |
| Test suite passes | All pass | 413/413 | ✅ PASS |

## Recommendations

### Test Quality: EXCELLENT
- Comprehensive benchmark coverage (20 total benchmarks)
- Statistical validation automated via JSON parsing
- Edge cases well-covered
- Integration tests validate end-to-end behavior

### No Additional Tests Required
The existing test suite comprehensively validates all acceptance criteria. QA has added 8 additional validation tests to automate AC verification from criterion JSON output, exceeding the specified testing strategy requirements.

### Code Quality Notes
- Zero dependencies in production code (only dev-dependencies for testing)
- All 413 tests passing with no flaky tests observed
- Performance significantly exceeds requirements (343x under target)
- Statistical stability excellent (CV = 1.29%)

## Conclusion

**PASS**: All acceptance criteria validated and passing. No test failures. No missing coverage.
