Add test of tutorials

tests/test_tutorials.py

@@ -0,0 +1,17 @@
+from pathlib import Path
+from typing import List
+
+from pytest import mark
+
+
+def available_tutorials() -> List[Path]:
+    """Locate the available tutorials in the docs."""
+    base_path = Path(__file__).parent.parent / "docs" / "demo"
+    return [p for p in base_path.rglob("*.py")]
+
+
+@mark.parametrize("tutorial", available_tutorials())
+def test_tutorials(tutorial):
+    import subprocess
+
+    subprocess.run(["python", tutorial]).check_returncode()