Fix tests when running pypy (python#84)

Also run CI against pypy and update actions.

Closes: python#83

Author: srittau

.github/workflows/ci.yml

@@ -18,15 +18,15 @@ jobs:
         # Python version, because typing sometimes changed between bugfix releases.
         # For available versions, see:
         # https://raw.githubusercontent.com/actions/python-versions/main/versions-manifest.json
-        python-version: ["3.7", "3.7.1", "3.8", "3.8.0", "3.9", "3.9.0", "3.10", "3.10.0", "3.11-dev"]
+        python-version: ["3.7", "3.7.1", "3.8", "3.8.0", "3.9", "3.9.0", "3.10", "3.10.0", "3.11-dev", "pypy3.9"]
 
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
 
       - name: Set up Python
-        uses: actions/setup-python@v2
+        uses: actions/setup-python@v4
         with:
           python-version: ${{ matrix.python-version }}
 
@@ -44,11 +44,11 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v2
-      - name: Set up Python 3
-        uses: actions/setup-python@v2
+      - uses: actions/checkout@v3
+      - name: Set up Python
+        uses: actions/setup-python@v4
         with:
-          python-version: 3
+          python-version: "3"
           cache: "pip"
           cache-dependency-path: "test-requirements.txt"
 

src/test_typing_extensions.py

@@ -509,6 +509,10 @@ def blah():
 
         blah()
 
+    @skipIf(
+        sys.implementation.name == "pypy",
+        "sum() and print() are not compiled in pypy"
+    )
     @patch(
         f"{registry_holder.__name__}._overload_registry",
         defaultdict(lambda: defaultdict(dict))