81 lines
2.4 KiB
Markdown
81 lines
2.4 KiB
Markdown
# Mutation Testing Baselines
|
|
|
|
> Sprint: SPRINT_0353_0001_0001_mutation_testing_integration
|
|
> Task: MUT-0353-005
|
|
|
|
This document tracks mutation testing baselines for critical modules.
|
|
|
|
## Baseline Scores
|
|
|
|
| Module | Initial Score | Target Score | Date Established |
|
|
|--------|--------------|--------------|------------------|
|
|
| Scanner.Core | 72% | ≥ 80% | 2025-12-16 |
|
|
| Policy.Engine | 68% | ≥ 80% | 2025-12-16 |
|
|
| Authority.Core | 75% | ≥ 85% | 2025-12-16 |
|
|
| Signer.Core | 70% | ≥ 80% | TBD |
|
|
| Attestor.Core | 65% | ≥ 80% | TBD |
|
|
| Reachability.Core | 60% | ≥ 75% | TBD |
|
|
|
|
## Threshold Configuration
|
|
|
|
See `stryker-thresholds.json` for per-module threshold configuration.
|
|
|
|
## Mutation Operators Applied
|
|
|
|
| Operator | Description | Enabled |
|
|
|----------|-------------|---------|
|
|
| Arithmetic | Replace +, -, *, /, % | ✓ |
|
|
| Boolean | Flip true/false | ✓ |
|
|
| Comparison | Replace <, >, <=, >=, ==, != | ✓ |
|
|
| Logical | Replace &&, ||, ! | ✓ |
|
|
| String | Mutate string literals | ✓ |
|
|
| Linq | Mutate LINQ methods | ✓ |
|
|
| NullCoalescing | Mutate ?? operators | ✓ |
|
|
| Assignment | Mutate assignment operators | ✓ |
|
|
|
|
## Exclusions
|
|
|
|
The following patterns are excluded from mutation testing:
|
|
|
|
- `**/Migrations/**` - Database migrations (tested via integration tests)
|
|
- `**/Generated/**` - Generated code
|
|
- `**/*.g.cs` - Source-generated files
|
|
- `**/Models/**` - Simple data transfer objects
|
|
- `**/Exceptions/**` - Exception types (tested via integration)
|
|
|
|
## Running Mutation Tests
|
|
|
|
### Local Execution
|
|
|
|
```bash
|
|
# Run mutation tests for a specific module
|
|
cd src/Scanner/__Libraries/StellaOps.Scanner.Core
|
|
dotnet stryker
|
|
|
|
# Run with specific configuration
|
|
dotnet stryker -f stryker-config.json --reporter html
|
|
|
|
# Quick mode (fewer mutations, faster feedback)
|
|
dotnet stryker --since:main
|
|
```
|
|
|
|
### CI Execution
|
|
|
|
Mutation tests run on:
|
|
- Merge requests targeting main
|
|
- Weekly scheduled runs (comprehensive)
|
|
|
|
Results are uploaded as artifacts and published to the mutation testing dashboard.
|
|
|
|
## Improving Mutation Score
|
|
|
|
1. **Add missing test cases** - Cover edge cases revealed by surviving mutants
|
|
2. **Strengthen assertions** - Replace weak assertions with specific ones
|
|
3. **Test boundary conditions** - Cover off-by-one and boundary scenarios
|
|
4. **Add negative tests** - Test that invalid inputs are rejected
|
|
|
|
## References
|
|
|
|
- [Stryker.NET Documentation](https://stryker-mutator.io/docs/stryker-net/)
|
|
- [Mutation Testing Guide](../testing/mutation-testing-guide.md)
|