Fix: Restore test collection for credentials and mock tests

.gitattributes

@@ -0,0 +1 @@
+*.py text eol=lf

.github/workflows/test.yml

@@ -0,0 +1,33 @@
+name: Python CI
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        python-version: [3.8, 3.9, 3.10, 3.11]
+
+    steps:
+    - name: Checkout code
+      uses: actions/checkout@v3
+
+    - name: Set up Python $\{{ matrix.python-version }}
+      uses: actions/setup-python@v4
+      with:
+        python-version: $\{{ matrix.python-version }}
+
+    - name: Install dependencies
+      run: |
+        python -m pip install --upgrade pip
+        pip install -e .[tests]
+
+    - name: Run tests
+      run: |
+        pytest -v tests/

google/auth/external_account_authorized_user.py

@@ -378,3 +378,5 @@ def from_file(cls, filename, **kwargs):
         with io.open(filename, "r", encoding="utf-8") as json_file:
             data = json.load(json_file)
             return cls.from_info(data, **kwargs)
+
+

tests/oauth2/test_credentials.py

@@ -1066,3 +1066,5 @@ def test_before_request(self, refresh, apply):
             cred.before_request(mock.Mock(), "GET", "https://example.com", {})
             refresh.assert_called()
             apply.assert_called()
+
+

tests/test_external_account_authorized_user.py

@@ -557,3 +557,5 @@ def test_from_file_full_options(self, tmpdir):
         assert creds.scopes == SCOPES
         assert creds._revoke_url == REVOKE_URL
         assert creds._quota_project_id == QUOTA_PROJECT_ID
+
+