Add workflow for testing python setup

python-setup/tests/setup_py/extra-require-not-installed/setup.py

@@ -0,0 +1,11 @@
+from setuptools import setup
+
+# has fake Trove classifier to fool Python extractor to believe this is Python 3 for sure
+
+# Programming Language :: Python :: 3.7
+
+setup(
+    name="example-setup.py",
+    install_requires=[],
+    extras_require={"all": ["requests==1.2.3"]}
+)