test: cover config load and errors

tests/test_configure_load.py

@@ -0,0 +1,32 @@
+from pathlib import Path
+
+import pytest
+
+from skywipe.configure import Configuration
+
+
+def test_configuration_load_missing_file(monkeypatch, tmp_path):
+    monkeypatch.setattr(Path, "home", lambda: tmp_path)
+    config = Configuration()
+    with pytest.raises(FileNotFoundError):
+        config.load()
+
+
+def test_configuration_load_empty_file(monkeypatch, tmp_path):
+    monkeypatch.setattr(Path, "home", lambda: tmp_path)
+    config = Configuration()
+    config.config_file.parent.mkdir(parents=True, exist_ok=True)
+    config.config_file.write_text("")
+
+    with pytest.raises(ValueError, match="empty or invalid"):
+        config.load()
+
+
+def test_configuration_load_invalid_yaml(monkeypatch, tmp_path):
+    monkeypatch.setattr(Path, "home", lambda: tmp_path)
+    config = Configuration()
+    config.config_file.parent.mkdir(parents=True, exist_ok=True)
+    config.config_file.write_text(": bad")
+
+    with pytest.raises(ValueError, match="Invalid YAML"):
+        config.load()