tests/cli(fmt): capture workspace root normalization gap

Author: tony

tests/cli/test_fmt.py

@@ -3,16 +3,16 @@
 from __future__ import annotations
 
 import logging
+import pathlib
 import typing as t
+from typing import ClassVar
 
 import pytest
 import yaml
 
 from vcspull.cli.fmt import format_config, format_config_file, normalize_repo_config
 
 if t.TYPE_CHECKING:
-    import pathlib
-
     from _pytest.logging import LogCaptureFixture
 
 
@@ -65,6 +65,79 @@ def test_both_url_and_repo(self) -> None:
 class TestFormatConfig:
     """Test configuration formatting."""
 
+    class WorkspaceRootFixture(t.NamedTuple):
+        """Fixture for workspace root normalization cases."""
+
+        test_id: str
+        config: dict[str, t.Any]
+        expected_roots: list[str]
+
+    WORKSPACE_ROOT_FIXTURES: ClassVar[list[WorkspaceRootFixture]] = [
+        WorkspaceRootFixture(
+            test_id="tilde-mixed-trailing-slash",
+            config={
+                "~/study/c": {
+                    "cpython": {"repo": "git+https://github.com/python/cpython.git"},
+                },
+                "~/study/c/": {
+                    "tmux": {"repo": "git+https://github.com/tmux/tmux.git"},
+                },
+            },
+            expected_roots=["~/study/c/"],
+        ),
+        WorkspaceRootFixture(
+            test_id="home-vs-absolute",
+            config={
+                str(pathlib.Path.home() / "study" / "c"): {
+                    "cpython": {"repo": "git+https://github.com/python/cpython.git"},
+                },
+                "~/study/c/": {
+                    "tmux": {"repo": "git+https://github.com/tmux/tmux.git"},
+                },
+            },
+            expected_roots=["~/study/c/"],
+        ),
+        WorkspaceRootFixture(
+            test_id="relative-vs-tilde",
+            config={
+                "./study/c": {
+                    "cpython": {"repo": "git+https://github.com/python/cpython.git"},
+                },
+                "~/study/c/": {
+                    "tmux": {"repo": "git+https://github.com/tmux/tmux.git"},
+                },
+            },
+            expected_roots=["~/study/c/"],
+        ),
+    ]
+
+    @pytest.mark.parametrize(
+        list(WorkspaceRootFixture._fields),
+        [
+            pytest.param(
+                *fixture,
+                marks=pytest.mark.xfail(
+                    reason=(
+                        "Workspace root normalization not yet implemented in formatter."
+                    ),
+                    strict=True,
+                ),
+            )
+            for fixture in WORKSPACE_ROOT_FIXTURES
+        ],
+        ids=[fixture.test_id for fixture in WORKSPACE_ROOT_FIXTURES],
+    )
+    def test_workspace_root_normalization(
+        self,
+        test_id: str,
+        config: dict[str, t.Any],
+        expected_roots: list[str],
+    ) -> None:
+        """Ensure format_config merges duplicate workspace roots."""
+        assert test_id  # ensure fixture naming used for clarity
+        formatted, _changes = format_config(config)
+        assert list(formatted.keys()) == expected_roots
+
     def test_sort_directories(self) -> None:
         """Test that directories are sorted alphabetically."""
         config = {