Run examples in YAML as tests

tests/test_example_files.py

@@ -0,0 +1,20 @@
+from pytest import mark
+from pathlib import Path
+import subprocess
+
+
+def collect_examples() -> list[Path]:
+    root = Path.cwd() / "docs" / "demo" / "examples"
+    return list(root.glob("**/*.yaml"))
+
+
+@mark.parametrize("example", collect_examples())
+def test_examples(example: Path, tmp_path: Path) -> None:
+    result = subprocess.run(
+        ["wsimod", str(example), "-o", str(tmp_path)],
+        shell=True,
+        check=True,
+    )
+    assert (tmp_path / "flows.csv").exists()
+    assert (tmp_path / "tanks.csv").exists()
+    assert (tmp_path / "surfaces.csv").exists()

wsimod/validation.py

@@ -38,12 +38,12 @@ def validate_io_args(
 
     # Valildate inputs folder
     settings_["inputs"] = _validate_input_dir(
-        settings_.get("inputs", inputs), default=settings.parent
+        inputs if inputs else settings_.get("inputs", None), default=settings.parent
     )
 
     # Valildate outputs folder
     settings_["outputs"] = _validate_output_dir(
-        settings_.get("outputs", outputs), default=settings.parent
+        outputs if outputs else settings_.get("outputs", None), default=settings.parent
     )
 
     return settings_