# Test-only image — the app's Python deps + pytest/ruff, and NOTHING else. Code is bind-mounted at
# run time (not baked), so pytest always sees the working tree, and this file never touches the prod
# Dockerfile, so the published image can never carry test tooling. Same python + same pinned
# requirements.txt as the runtime stage, so tests run against the prod dependency set. Rebuilt only
# when a requirements file changes (the pip layer is cache-keyed on them); otherwise a no-op.
#
#   docker build -f backend/Dockerfile.test -t siftlode-test:local backend
#   docker run --rm -v "<repo>/backend:/app" -w /app siftlode-test:local python -m pytest
FROM python:3.12-slim
WORKDIR /app
# ffmpeg so the thumbnail/poster tests (needs_ffmpeg) actually run in the gate instead of skipping
# silently — the runtime image already ships ffmpeg, so the test image should too (see conftest's
# SIFTLODE_TEST_REQUIRE_DB, which now also refuses to run if ffmpeg is missing).
RUN apt-get update \
    && apt-get install -y --no-install-recommends ffmpeg \
    && rm -rf /var/lib/apt/lists/*
# Install the SAME pinned lock as the prod image (+ the test-only tooling), so the tests run against
# the exact dependency versions prod ships.
COPY requirements.lock requirements-dev.txt ./
RUN pip install --no-cache-dir -r requirements.lock -r requirements-dev.txt