.github/workflows/java.yml

name: Java

on:
  pull_request:
    paths:
      - "**/*.java"
      - "**/*.gradle"
  push:
    branches:
      - main
  workflow_dispatch:

jobs:
  build:
    name: Check if tests compile cleanly with starter sources
    runs-on: ubuntu-24.04
    steps:
      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd
      - name: Set up JDK 21
        uses: actions/setup-java@be666c2fcd27ec809703dec50e508c2fdc7f6654
        with:
          java-version: 21
          distribution: "temurin"
      - name: Check if tests compile cleanly with starter sources
        run: ./gradlew compileStarterTestJava --continue
        working-directory: exercises

  lint:
    name: Lint Java files using Checkstyle
    runs-on: ubuntu-24.04
    steps:
      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd
      - name: Set up JDK 21
        uses: actions/setup-java@be666c2fcd27ec809703dec50e508c2fdc7f6654
        with:
          java-version: 21
          distribution: "temurin"
      - name: Run checkstyle
        run: ./gradlew check --exclude-task test --continue
        working-directory: exercises

  test-all:
    name: Test all exercises using java-test-runner
    if: github.event_name == 'push' || github.event_name == 'workflow_dispatch'
    runs-on: ubuntu-24.04
    steps:
      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd
      - name: Test all exercises using java-test-runner
        run: bin/test-with-test-runner
      - name: Print summary
        run: |
          if [ -f exercises/build/summary.txt ]; then
            echo "===== TEST SUMMARY ====="
            cat exercises/build/summary.txt
            echo "========================"
          else
            echo "===== ALL TESTS PASSED ====="
            echo "No summary file was generated."
            echo "============================="
          fi
        if: always() 
      - name: Archive test results
        uses: actions/upload-artifact@b7c566a772e6b6bfb58ed0dc250532a479d7789f
        with:
          name: test-results
          path: exercises/**/build/results.json
        if: failure()
        
  test-changed:
    name: Test changed exercises using gradlew
    if: github.event_name == 'pull_request'
    runs-on: ubuntu-24.04
    steps:
      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd
        with:
          fetch-depth: 0
      - name: Test changed exercises using java-test-runner
        run: bin/test-changed-exercise
      - name: Print summary
        run: |
          if [ -f exercises/build/summary.txt ]; then
            echo "===== TEST SUMMARY ====="
            cat exercises/build/summary.txt
            echo "========================"
          else
            echo "===== ALL TESTS PASSED ====="
            echo "No summary file was generated."
            echo "============================="
          fi
        if: always() 
      - name: Archive test results
        uses: actions/upload-artifact@b7c566a772e6b6bfb58ed0dc250532a479d7789f
        with:
          name: test-results
          path: |
            exercises/**/build/results.txt
            exercises/**/build/results.json
        if: failure()