🚧 WIP

tests/unit/test_status_parsing.py

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+"""Unit tests for porcelain parsing and ChangeType mapping (Section 6)."""
+
+from __future__ import annotations
+
+import pytest
+
+from git_auto_tracker.changes.models import ChangeType
+from git_auto_tracker.errors import GitError
+from git_auto_tracker.git.status import RawStatusEntry, parse_porcelain_z
+
+
+def _build(entries: list[tuple[str, str, str | None]]) -> bytes:
+    """Serialize porcelain -z records: 'XY path' + optional origin path."""
+    parts: list[bytes] = []
+    for xy, path, previous in entries:
+        parts.append(f"{xy} {path}".encode())
+        if previous:
+            parts.append(previous.encode())
+    return b"\x00".join(parts) + b"\x00"
+
+
+class TestParsePorcelainZ:
+    def test_modified(self) -> None:
+        raw = _build([(" M", "config.xml", None)])
+        (entry,) = parse_porcelain_z(raw)
+        assert entry.path == "config.xml"
+        assert entry.change_type is ChangeType.MODIFIED
+
+    def test_untracked_is_added(self) -> None:
+        raw = _build([("??", "new.xml", None)])
+        (entry,) = parse_porcelain_z(raw)
+        assert entry.change_type is ChangeType.ADDED
+
+    def test_deleted(self) -> None:
+        raw = _build([(" D", "gone.xml", None)])
+        (entry,) = parse_porcelain_z(raw)
+        assert entry.change_type is ChangeType.DELETED
+
+    def test_staged_deletion(self) -> None:
+        raw = _build([("D ", "gone.xml", None)])
+        (entry,) = parse_porcelain_z(raw)
+        assert entry.change_type is ChangeType.DELETED
+
+    def test_rename_with_previous(self) -> None:
+        raw = _build([("R ", "new.xml", "old.xml")])
+        (entry,) = parse_porcelain_z(raw)
+        assert entry.change_type is ChangeType.RENAMED
+        assert entry.previous_path == "old.xml"
+
+    def test_filenames_with_spaces_and_unicode(self) -> None:
+        raw = _build([(" M", "Station PS101/räumliche Datei.xml", None)])
+        (entry,) = parse_porcelain_z(raw)
+        assert entry.path == "Station PS101/räumliche Datei.xml"
+
+    def test_trailing_empty_chunks_ignored(self) -> None:
+        raw = b"\x00\x00 M a.xml\x00\x00"
+        entries = parse_porcelain_z(raw)
+        assert len(entries) == 1
+
+    def test_invalid_xy_rejected(self) -> None:
+        with pytest.raises(GitError):
+            parse_porcelain_z(b"XX path.xml\x00")
+
+
+class TestChangeTypeMapping:
+    def test_staged_addition(self) -> None:
+        entry = RawStatusEntry.from_zy_pair("A ", "a.xml", None)
+        assert entry.change_type is ChangeType.ADDED
+
+    def test_staged_rename(self) -> None:
+        entry = RawStatusEntry.from_zy_pair("R ", "a.xml", "b.xml")
+        assert entry.change_type is ChangeType.RENAMED