test_include_guard.yaml

name: Test Keras include guards
# These tests check that the include guards checking for Keras availability
# behave as expected on ubuntu and macOS.

on:
  pull_request:
  push:
    branches:
      - main

jobs:
  keras_guards:
    name: Test include guards
    strategy:
      matrix:
        os: [ubuntu-latest, macos-latest]
    runs-on: ${{ matrix.os }}
    steps:
      - name: Check out repository
        uses: actions/checkout@v3

      - name: Setup Python
        uses: actions/setup-python@v4
        with:
          python-version: '3.12'

      - name: Install cellfinder via pip
        run: python -m pip install -e "."

      - name: Test (working) import
        uses: jannekem/run-python-script-action@v1
        env:
          KERAS_BACKEND: torch
        with:
          fail-on-error: true
          script: |
            import cellfinder.core
            import cellfinder.napari

      - name: Uninstall keras
        run: python -m pip uninstall -y keras

      - name: Test (broken) import
        id: broken_import
        uses: jannekem/run-python-script-action@v1
        with:
          fail-on-error: false
          script: |
            import cellfinder.core

      # exit 1 will force an actions exit with a failure reported
      - name: Flag error thrown by broken import
        if: steps.broken_import.outputs.error == 'false'
        run: |
          echo "Broken import test result was: ${{ steps.broken_import.outputs.error }}"
          exit 1

      # add an additional step to confirm an error occurred in the import
      - name: Confirm error was thrown by broken import
        if: steps.broken_import.outputs.error == 'true'
        run: |
          echo "Broken import test result was: ${{ steps.broken_import.outputs.error }}"