run pydantic tests as an allowed-to-fail job (#767)

Author: davidhewitt

.github/workflows/ci.yml

@@ -175,6 +175,46 @@ jobs:
       - run: pip freeze
       - run: pytest
 
+  test-pydantic-integration:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v3
+        with:
+          repository: pydantic/pydantic
+          path: pydantic
+
+      - uses: actions/checkout@v3
+        with:
+          path: pydantic-core
+
+      - name: set up python
+        uses: actions/setup-python@v4
+        with:
+          python-version: '3.11'
+
+      - name: install rust stable
+        uses: dtolnay/rust-toolchain@stable
+
+      - name: cache rust
+        uses: Swatinem/rust-cache@v2
+        with:
+          key: test-pydantic-integration
+
+      - name: install deps
+        run: |
+          pip install pdm maturin
+          pdm venv create --with-pip
+          pdm install -G testing
+          pdm run pip install maturin
+          pdm run bash -c 'cd ../pydantic-core && make build-dev'
+        working-directory: pydantic
+
+      - run: pdm info && pdm list
+        working-directory: pydantic
+      - run: pdm run pytest
+        working-directory: pydantic
+
   lint:
     runs-on: ubuntu-latest
 
@@ -296,14 +336,14 @@ jobs:
   # https://github.com/marketplace/actions/alls-green#why used for branch protection checks
   check:
     if: always()
-    needs: [coverage, test-python, test-os, test-debug, lint, bench, build-wasm-emscripten]
+    needs: [coverage, test-python, test-os, test-debug, test-pydantic-integration, lint, bench, build-wasm-emscripten]
     runs-on: ubuntu-latest
     steps:
       - name: Decide whether the needed jobs succeeded or failed
         uses: re-actors/alls-green@release/v1
         with:
           jobs: ${{ toJSON(needs) }}
-          allowed-failures: coverage
+          allowed-failures: coverage, test-pydantic-integration
 
   build-sdist:
     name: build sdist