name: Tests

on:
  push:
    branches:
    - main
  pull_request:
    branches:
    - '*'

jobs:
  test:
    strategy:
      matrix:
        go-version: [1.15, 1.16]
        platform: [ubuntu-latest, macos-latest]
    runs-on: ${{ matrix.platform }}

    steps:
    - name: Install Go
      uses: actions/setup-go@v2
      with:
        go-version: ${{ matrix.go-version }}

    - name: Checkout code
      uses: actions/checkout@v2

    - name: Check formatting
      if: matrix.go-version == '1.16' && matrix.platform == 'ubuntu-latest'
      run: diff -u <(echo -n) <(go fmt $(go list ./...))

    - name: Check Go modules
      if: matrix.go-version == '1.16'
      run: |
        go mod tidy
        git diff --exit-code

    - name: Run unit tests
      run: go test -v ./...