test: add pytest coverage for core modules

tests/test_config.py

@@ -0,0 +1,44 @@
+from __future__ import annotations
+
+from pathlib import Path
+
+from afs.config import load_config, load_config_model
+
+
+def test_load_config_merges_workspace_registry(tmp_path, monkeypatch) -> None:
+    context_root = tmp_path / "context"
+    context_root.mkdir()
+    workspace_dir = tmp_path / "workspace"
+    workspace_dir.mkdir()
+
+    registry_path = context_root / "workspaces.toml"
+    registry_path.write_text(
+        "[[workspaces]]\n"
+        f"path = \"{workspace_dir}\"\n"
+        "description = \"Example\"\n",
+        encoding="utf-8",
+    )
+
+    config_path = tmp_path / "afs.toml"
+    config_path.write_text(
+        f"[general]\ncontext_root = \"{context_root}\"\n",
+        encoding="utf-8",
+    )
+
+    monkeypatch.chdir(tmp_path)
+    data = load_config(merge_user=False)
+    workspaces = data["general"]["workspace_directories"]
+    assert workspaces
+    assert Path(workspaces[0]["path"]).resolve() == workspace_dir.resolve()
+
+
+def test_load_config_model_uses_explicit_path(tmp_path) -> None:
+    context_root = tmp_path / "context"
+    config_path = tmp_path / "custom.toml"
+    config_path.write_text(
+        f"[general]\ncontext_root = \"{context_root}\"\n",
+        encoding="utf-8",
+    )
+
+    model = load_config_model(config_path=config_path, merge_user=False)
+    assert model.general.context_root == context_root.resolve()