Initial Release:

https://chatgpt.com/share/6941a2a4-7974-800f-8911-9ab0bf1e3873

tests/unit/test_config.py

@@ -0,0 +1,57 @@
+from __future__ import annotations
+
+import os
+import tempfile
+import unittest
+from pathlib import Path
+
+from dotlinker.config import default_config_path, load_config, save_config, upsert_mapping
+from dotlinker.model import Mapping
+
+
+class TestConfig(unittest.TestCase):
+    def test_default_config_path_respects_xdg(self) -> None:
+        with tempfile.TemporaryDirectory() as td:
+            xdg = Path(td) / "xdg"
+            os.environ["XDG_CONFIG_HOME"] = str(xdg)
+
+            p = default_config_path()
+            self.assertEqual(p, xdg / "dotlinker" / "config.yaml")
+
+    def test_load_config_missing_returns_empty(self) -> None:
+        with tempfile.TemporaryDirectory() as td:
+            cfg = Path(td) / "missing.yaml"
+            self.assertEqual(load_config(cfg), [])
+
+    def test_save_and_load_roundtrip(self) -> None:
+        with tempfile.TemporaryDirectory() as td:
+            cfg = Path(td) / "cfg.yaml"
+            mappings = [
+                Mapping(name="zshrc", backend="chezmoi", src="~/.zshrc", dest=None),
+                Mapping(
+                    name="nvim",
+                    backend="cloud",
+                    src="~/.config/nvim",
+                    dest="~/Nextcloud/dotfiles/.config/nvim",
+                ),
+            ]
+
+            save_config(cfg, mappings)
+            loaded = load_config(cfg)
+            self.assertEqual(loaded, mappings)
+
+    def test_upsert_adds_when_missing(self) -> None:
+        out = upsert_mapping([], Mapping("a", "chezmoi", "~/.a", None), replace=False)
+        self.assertEqual(len(out), 1)
+        self.assertEqual(out[0].name, "a")
+
+    def test_upsert_rejects_duplicate_without_replace(self) -> None:
+        items = [Mapping("a", "chezmoi", "~/.a", None)]
+        with self.assertRaises(ValueError):
+            upsert_mapping(items, Mapping("a", "cloud", "~/.a", "~/x"), replace=False)
+
+    def test_upsert_replaces_with_replace(self) -> None:
+        items = [Mapping("a", "chezmoi", "~/.a", None)]
+        out = upsert_mapping(items, Mapping("a", "cloud", "~/.a", "~/x"), replace=True)
+        self.assertEqual(out[0].backend, "cloud")
+        self.assertEqual(out[0].dest, "~/x")