mutation.yml

name: Mutation Testing

on:
  # Run on PRs to main to catch test quality regressions.
  pull_request:
    branches: [main]
    paths:
      - "contracts/**"
      - "cargo-mutants.toml"
  # Allow manual runs to get a baseline score.
  workflow_dispatch:

jobs:
  mutants:
    name: cargo-mutants
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4

      - name: Install Rust
        uses: dtolnay/rust-toolchain@stable

      - name: Cache Cargo registry
        uses: actions/cache@v4
        with:
          path: |
            ~/.cargo/registry
            ~/.cargo/git
            target
          key: ${{ runner.os }}-cargo-mutants-${{ hashFiles('**/Cargo.lock') }}

      - name: Install cargo-mutants
        run: cargo install cargo-mutants --locked

      - name: Run mutation tests
        run: ./scripts/mutation_test.sh

      - name: Upload mutation results
        if: always()
        uses: actions/upload-artifact@v4
        with:
          name: mutation-results
          path: mutants.out/
          retention-days: 14