fix: install package via pip in CI

Author: basnijholt

.github/workflows/ci.yml

@@ -43,10 +43,10 @@ jobs:
       - name: Install test dependencies
         run: |
           python -m pip install --upgrade pip
-          python -m pip install maturin pytest scipy
+          python -m pip install pytest scipy
 
-      - name: Build extension in editable mode
-        run: maturin develop
+      - name: Install package
+        run: python -m pip install .
 
       - name: Run test suite
         run: pytest -x -v

tests/test_project_metadata.py

@@ -23,8 +23,19 @@ def workflow_python_versions() -> list[str]:
     return sorted(set(re.findall(r'- "(3\.\d+)"', workflow)))
 
 
+def workflow_contents() -> str:
+    return (ROOT / ".github/workflows/ci.yml").read_text()
+
+
 def test_python_version_support_matches_current_bindings() -> None:
     expected = ["3.10", "3.11", "3.12", "3.13"]
 
     assert pyproject_python_versions() == expected
     assert workflow_python_versions() == expected
+
+
+def test_ci_avoids_maturin_develop_without_virtualenv() -> None:
+    workflow = workflow_contents()
+
+    assert "maturin develop" not in workflow
+    assert "python -m pip install ." in workflow