add check for directory in config loader

pyproject.toml

@@ -1,6 +1,6 @@
 [project]
 name = "dopt-basics"
-version = "0.1.1"
+version = "0.1.2"
 description = "basic cross-project tools for Python-based d-opt projects"
 authors = [
     {name = "Florian Förster", email = "f.foerster@d-opt.com"},

src/dopt_basics/configs.py

@@ -14,6 +14,9 @@ def load_toml(
 
     if not path_to_toml.exists():
         raise FileNotFoundError(f"Config file seems not to exist under: >{path_to_toml}<")
+    if not path_to_toml.is_file():
+        raise ValueError("Object to which path points must be a file.")
+
     path_to_toml = path_to_toml.with_suffix(".toml")
 
     with open(path_to_toml, "rb") as f:

tests/test_configs.py

@@ -34,3 +34,10 @@ def test_load_toml_FailWrongPath(tmp_path):
 
     with pytest.raises(FileNotFoundError):
         _ = configs.load_toml(wrong_pth)
+
+
+def test_load_toml_FailIsDirectory(config_file):
+    wrong_pth = config_file.parent
+
+    with pytest.raises(ValueError):
+        _ = configs.load_toml(wrong_pth)