Install testsuite when using deadsnakes PPA

Author: oremanj

.github/workflows/ci.yml

@@ -66,6 +66,13 @@ jobs:
         if: endsWith(matrix.python, '-dev')
         with:
           python-version: '${{ matrix.python }}'
+      - name: Install python testsuite
+        if: endsWith(matrix.python, '-dev')
+        run: |
+          version=$(echo $PYVERSION | sed 's/-dev//')
+          sudo apt-get install -y --no-install-recommends libpython${version}-testsuite
+        env:
+          PYVERSION: '${{ matrix.python }}'
       - name: Run tests
         run: ./ci.sh
         env:

ci.sh

@@ -80,6 +80,9 @@ if python -c 'import sys; sys.exit(sys.version_info >= (3, 7))'; then
     git diff test-requirements.txt
 fi
 
+# See https://github.com/python-trio/trio/issues/334
+YAPF_VERSION=0.20.0
+
 if [ "$CHECK_FORMATTING" = "1" ]; then
     pip install yapf==${YAPF_VERSION}
     if ! yapf -rpd setup.py trio_asyncio; then