name: output
on: push

jobs:
  build_output:
    runs-on: ubuntu-latest
    steps:
    - id: set_1
      run: |
        echo "::set-output name=var_1::$(echo var1)"
        echo "::set-output name=var_2::$(echo var2)"
    - id: set_2
      run: |
        echo "::set-output name=var_3::$(echo var3)"
    outputs:
      variable_1: ${{ steps.set_1.outputs.var_1 }}
      variable_2: ${{ steps.set_1.outputs.var_2 }}
      variable_3: ${{ steps.set_2.outputs.var_3 }}

  build:
    needs: build_output
    runs-on: ubuntu-latest
    steps:
      - name: Check outputs
        run: |
          test "${{ needs.build_output.outputs.variable_1 }}" = var1
          test "${{ needs.build_output.outputs.variable_2 }}" = var2
          test "${{ needs.build_output.outputs.variable_3 }}" = var3