python-tests.yaml

name: Unit tests

env:
  # enable colored output
  # https://github.com/pytest-dev/pytest/issues/7443
  PY_COLORS: 1

on:
  pull_request:
    paths:
      - .github/workflows/python-tests.yaml
      - "src/prefect/**/*.py"
      - "tests/**/*.py"
      - requirements.txt
      - requirements-client.txt
      - requirements-dev.txt
      - setup.cfg
      - Dockerfile
  push:
    branches:
      - main
    paths:
      - .github/workflows/python-tests.yaml
      - "src/prefect/**/*.py"
      - "tests/**/*.py"
      - requirements.txt
      - requirements-client.txt
      - requirements-dev.txt
      - setup.cfg
      - Dockerfile

permissions:
  contents: read

# Limit concurrency by workflow/branch combination.
#
# For pull request builds, pushing additional changes to the
# branch will cancel prior in-progress and pending builds.
#
# For builds triggered on a branch push, additional changes
# will wait for prior builds to complete before starting.
#
# https://docs.github.com/en/actions/using-jobs/using-concurrency
concurrency:
  group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
  cancel-in-progress: ${{ github.event_name == 'pull_request' }}

jobs:
  run-tests:
    runs-on:
      group: oss-larger-runners
    name: ${{ matrix.test-type.name }} - python:${{ matrix.python-version }}, ${{ matrix.database }}
    strategy:
      matrix:
        test-type:
          - name: Server Tests
            modules: tests/server/ tests/events/server
          - name: Client Tests
            modules: tests/ --ignore tests/server/ tests/events/server
        database:
          - "postgres:14"
          - "sqlite"
        python-version:
          - "3.9"
          - "3.10"
          - "3.11"
          - "3.12"
        exclude:
          - database: "sqlite"
            test-type: 
              name: Client Tests
              modules: tests/ --ignore tests/server/ tests/events/server

      fail-fast: true

    timeout-minutes: 20

    steps:
      - name: Display current test matrix
        run: echo '${{ toJSON(matrix) }}'

      - uses: actions/checkout@v4
        with:
          persist-credentials: false
          fetch-depth: 0

      - name: Set up Python ${{ matrix.python-version }}
        uses: actions/setup-python@v5
        id: setup_python
        with:
          python-version: ${{ matrix.python-version }}

      - name: UV Cache
        # Manually cache the uv cache directory
        # until setup-python supports it:
        # https://github.com/actions/setup-python/issues/822
        uses: actions/cache@v4
        id: cache-uv
        with:
          path: ~/.cache/uv
          key: uvcache-${{ runner.os }}-${{ steps.setup_python.outputs.python-version }}-${{ hashFiles('requirements-client.txt', 'requirements.txt', 'requirements-dev.txt') }}

      - name: Install packages
        run: |
          python -m pip install -U uv
          uv pip install --upgrade --system -e .[dev]

      - name: Start database container
        if: ${{ startsWith(matrix.database, 'postgres') }}
        run: >
          docker run
          --name "postgres"
          --detach
          --health-cmd pg_isready
          --health-interval 10s
          --health-timeout 5s
          --health-retries 5
          --publish 5432:5432
          --tmpfs /var/lib/postgresql/data
          --env POSTGRES_USER="prefect"
          --env POSTGRES_PASSWORD="prefect"
          --env POSTGRES_DB="prefect"
          --env LANG="C.UTF-8"
          --env LANGUAGE="C.UTF-8"
          --env LC_ALL="C.UTF-8"
          --env LC_COLLATE="C.UTF-8"
          --env LC_CTYPE="C.UTF-8"
          ${{ matrix.database }}
          -c max_connections=250

          ./scripts/wait-for-healthy-container.sh postgres 30

          echo "PREFECT_API_DATABASE_CONNECTION_URL=postgresql+asyncpg://prefect:prefect@localhost/prefect" >> $GITHUB_ENV

      - name: Start redis
        run: >
          docker run
          --name "redis"
          --detach
          --publish 6379:6379
          redis:latest

        # Parallelize tests by scope to reduce expensive service fixture duplication
        # Do not allow the test suite to build images, as we want the prebuilt images to be tested
        # Do not run Kubernetes service tests, we do not have a cluster available
        # maxprocesses 6 is based on empirical testing; higher than 6 sees diminishing returns
      - name: Run tests
        env:
          PREFECT_EXPERIMENTAL_ENABLE_PYDANTIC_V2_INTERNALS: "1"
        run: >
          pytest ${{ matrix.test-type.modules }}
          --numprocesses auto
          --maxprocesses 6
          --dist worksteal
          --disable-docker-image-builds
          --exclude-service kubernetes
          --exclude-service docker
          --durations 26
          --no-cov

      - name: Create and Upload failure flag
        if: ${{ failure() }}
        id: create_failure_flag
        run: |
          sanitized_name="${{ matrix.python-version }}-${{ matrix.database }}"
          sanitized_name="${sanitized_name//:/-}"
          echo "Failure in $sanitized_name" > "${sanitized_name}-failure.txt"
          echo "artifact_name=${sanitized_name}-failure" >> $GITHUB_OUTPUT

      - name: Upload failure flag
        if: ${{ failure() }}
        uses: actions/upload-artifact@v4
        with:
          name: ${{ steps.create_failure_flag.outputs.artifact_name }}
          path: "${{ steps.create_failure_flag.outputs.artifact_name }}.txt"

      - name: Check database container
        # Only applicable for Postgres, but we want this to run even when tests fail
        if: always()
        run: >
          docker container inspect postgres
          && docker container logs postgres
          || echo "Ignoring bad exit code"

  run-docker-tests:
    runs-on:
      group: oss-larger-runners
    name: docker, python:${{ matrix.python-version }}
    strategy:
      matrix:
        database:
          - "postgres:14"
        python-version:
          - "3.9"
          - "3.10"
          - "3.11"
          - "3.12"

      fail-fast: true

    timeout-minutes: 45

    steps:
      - name: Display current test matrix
        run: echo '${{ toJSON(matrix) }}'

      - uses: actions/checkout@v4
        with:
          persist-credentials: false
          fetch-depth: 0

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3
        with:
          driver-opts: image=moby/buildkit:v0.12.5

      - name: Set up Python ${{ matrix.python-version }}
        uses: actions/setup-python@v5
        id: setup_python
        with:
          python-version: ${{ matrix.python-version }}

      - name: UV Cache
        # Manually cache the uv cache directory
        # until setup-python supports it:
        # https://github.com/actions/setup-python/issues/822
        uses: actions/cache@v4
        id: cache-uv
        with:
          path: ~/.cache/uv
          key: uvcache-${{ runner.os }}-${{ steps.setup_python.outputs.python-version }}-${{ hashFiles('requirements-client.txt', 'requirements.txt', 'requirements-dev.txt') }}

      - name: Get image tag
        id: get_image_tag
        run: |
          SHORT_SHA=$(git rev-parse --short=7 HEAD)
          tmp="sha-$SHORT_SHA-python${{ matrix.python-version }}"
          echo "image_tag=${tmp}" >> $GITHUB_OUTPUT

      - name: Build test image
        uses: docker/build-push-action@v6
        with:
          context: .
          build-args: |
            PYTHON_VERSION=${{ matrix.python-version }}
            PREFECT_EXTRAS=[dev]
          tags: prefecthq/prefect-dev:${{ steps.get_image_tag.outputs.image_tag }}
          outputs: type=docker,dest=/tmp/image.tar

      - name: Test Docker image
        run: |
          docker load --input /tmp/image.tar
          docker run --rm prefecthq/prefect-dev:${{ steps.get_image_tag.outputs.image_tag }} prefect version

      - name: Install packages
        run: |
          python -m pip install -U uv
          uv pip install --upgrade --system -e .[dev]

      - name: Start database container
        if: ${{ startsWith(matrix.database, 'postgres') }}
        run: >
          docker run
          --name "postgres"
          --detach
          --health-cmd pg_isready
          --health-interval 10s
          --health-timeout 5s
          --health-retries 5
          --publish 5432:5432
          --tmpfs /var/lib/postgresql/data
          --env POSTGRES_USER="prefect"
          --env POSTGRES_PASSWORD="prefect"
          --env POSTGRES_DB="prefect"
          --env LANG="C.UTF-8"
          --env LANGUAGE="C.UTF-8"
          --env LC_ALL="C.UTF-8"
          --env LC_COLLATE="C.UTF-8"
          --env LC_CTYPE="C.UTF-8"
          ${{ matrix.database }}
          -c max_connections=250

          ./scripts/wait-for-healthy-container.sh postgres 30

          echo "PREFECT_API_DATABASE_CONNECTION_URL=postgresql+asyncpg://prefect:prefect@localhost/prefect" >> $GITHUB_ENV

      - name: Start docker registry
        run: >
          docker run
          --name "prefect-test-registry"
          --detach
          --publish 5555:5000
          registry:2

      - name: Start redis
        run: >
          docker run
          --name "redis"
          --detach
          --publish 6379:6379
          redis:latest

        # Parallelize tests by scope to reduce expensive service fixture duplication
        # Do not allow the test suite to build images, as we want the prebuilt images to be tested
        # Do not run Kubernetes service tests, we do not have a cluster available
        # maxprocesses 6 is based on empirical testing; higher than 6 sees diminishing returns
      - name: Run tests
        env:
          PREFECT_EXPERIMENTAL_ENABLE_PYDANTIC_V2_INTERNALS: "1"
        run: >
          pytest tests
          --numprocesses auto
          --maxprocesses 6
          --dist worksteal
          --disable-docker-image-builds
          --only-service docker
          --durations 26
          --no-cov

      - name: Create and Upload failure flag
        if: ${{ failure() }}
        id: create_failure_flag
        run: |
          sanitized_name="${{ matrix.python-version }}-${{ matrix.database }}"
          sanitized_name="${sanitized_name//:/-}"
          echo "Failure in $sanitized_name" > "${sanitized_name}-failure.txt"
          echo "artifact_name=${sanitized_name}-failure" >> $GITHUB_OUTPUT

      - name: Upload failure flag
        if: ${{ failure() }}
        uses: actions/upload-artifact@v4
        with:
          name: ${{ steps.create_failure_flag.outputs.artifact_name }}
          path: "${{ steps.create_failure_flag.outputs.artifact_name }}.txt"

      - name: Check database container
        # Only applicable for Postgres, but we want this to run even when tests fail
        if: always()
        run: >
          docker container inspect postgres
          && docker container logs postgres
          || echo "Ignoring bad exit code"