How do I automate testing for Terraform backends in GitHub Actions?

        name: Terraform CI

        on:
          push:
            branches:
              - main
          pull_request:
            branches:
              - main

        jobs:
          terraform:
            runs-on: ubuntu-latest

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

              - name: Set up Terraform
                uses: hashicorp/setup-terraform@v1
                with:
                  terraform_version: 1.0.0

              - name: Terraform Init
                run: terraform init

              - name: Terraform Validate
                run: terraform validate

              - name: Terraform Plan
                run: terraform plan

              - name: Terraform Apply (if integrate with a testing framework)
                run: terraform apply -auto-approve
                env:
                  TF_VAR_some_variable: ${{ secrets.SOME_SECRET }}