name: tests - rust

on:
  push:
    branches:
      - main
  pull_request:
    types: [opened, reopened, synchronize]

jobs:
  test:
    strategy:
      # A simple matrix for now, but if we introduce an MSRV it can be added here.
      matrix:
        rust:
          - "stable"

    runs-on: ubuntu-latest
    name: "rust ${{ matrix.rust }}"

    steps:
      - uses: actions/checkout@v4

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

      - name: Cache cargo build
        uses: actions/cache@v4
        with:
          path: target
          key: ${{ runner.os }}-${{ matrix.rust }}-cargo-build-target-${{ hashFiles('**/Cargo.lock') }}

      - uses: actions-rs/toolchain@v1
        with:
          toolchain: "${{ matrix.rust }}"
          override: true

      - name: test
        run: cargo test