Explicit test for user warning

.github/workflows/CI_conda.yml

@@ -67,6 +67,8 @@ jobs:
             conda install -c conda-forge $(cat requirements.txt | grep -v "julia" | xargs echo | sed "s/_/-/g")
             pip install .
             python -c 'import pysr; pysr.install()'
+      - name: "Ensure that static libpython warning appears"
+        run: python test/test_static_libpython_warning.py
       - name: "Install Coverage tool"
         run: pip install coverage coveralls
       - name: "Run tests"

test/test_static_libpython_warning.py

@@ -0,0 +1,12 @@
+"""Test that running PySR with static libpython raises a warning."""
+
+import warnings
+import pysr
+
+with warnings.catch_warnings(record=True) as warning_catcher:
+    warnings.simplefilter("always")
+    pysr.sr.init_julia()
+
+    assert len(warning_catcher) == 1
+    assert issubclass(warning_catcher[-1].category, UserWarning)
+    assert "static" in str(warning_catcher[-1].message)