chore: Use shiny's Makefile to allow for test commands to change over…

… time (narwhals-dev#1161)

* Use shiny's Makefile to allow for test commands to change over time

Related: 
* posit-dev/py-shiny#1729
* posit-dev/py-shiny#1731

* Remove white space

* Update step name

.github/workflows/downstream_tests.yml

@@ -113,22 +113,18 @@ jobs:
  - name: install-basics
  run: uv pip install --upgrade tox virtualenv setuptools --system
  - name: install-shiny-dev
+ env:
+ UV_SYSTEM_PYTHON: 1
  run: |
  cd py-shiny
- uv pip install -e ".[dev,test]" --system
+ make narwhals-install-shiny
  - name: install-narwhals-dev
  run: |
  uv pip uninstall narwhals --system
  uv pip install -e . --system
  - name: show-deps
  run: uv pip freeze
- - name: Run pytest
- run: |
- cd py-shiny
- python tests/pytest/asyncio_prevent.py
- pytest
- - name: Run mypy
+ - name: Run `make narwhals-test-integration`
  run: |
  cd py-shiny
- uv pip install mypy --system
- mypy shiny
+ make narwhals-test-integration