Initial SyncVito release with installer updater

tests/test_sync_engine.py

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+import os
+from pathlib import Path
+
+from syncvito.models import ConflictMode, DeleteMode, SyncDirection, SyncTask
+from syncvito.state_store import StateStore
+from syncvito.sync_engine import SyncEngine
+
+
+def _engine(tmp_path: Path) -> SyncEngine:
+    return SyncEngine(StateStore(tmp_path / "state.json"))
+
+
+def test_one_way_copy_and_mirror_delete(tmp_path: Path) -> None:
+    source = tmp_path / "source"
+    target = tmp_path / "target"
+    source.mkdir()
+    target.mkdir()
+    (source / "neu.txt").write_text("aktuell", encoding="utf-8")
+    (target / "alt.txt").write_text("veraltet", encoding="utf-8")
+    task = SyncTask(
+        name="Einweg",
+        source=str(source),
+        target=str(target),
+        delete_mode=DeleteMode.MIRROR,
+    )
+
+    result = _engine(tmp_path).synchronize(task)
+
+    assert result.successful
+    assert (target / "neu.txt").read_text(encoding="utf-8") == "aktuell"
+    assert not (target / "alt.txt").exists()
+
+
+def test_selection_limits_synced_files(tmp_path: Path) -> None:
+    source = tmp_path / "source"
+    target = tmp_path / "target"
+    (source / "auswahl").mkdir(parents=True)
+    target.mkdir()
+    (source / "auswahl" / "ja.txt").write_text("ja", encoding="utf-8")
+    (source / "nein.txt").write_text("nein", encoding="utf-8")
+    task = SyncTask(
+        name="Auswahl",
+        source=str(source),
+        target=str(target),
+        selected_paths=["auswahl"],
+    )
+
+    _engine(tmp_path).synchronize(task)
+
+    assert (target / "auswahl" / "ja.txt").exists()
+    assert not (target / "nein.txt").exists()
+
+
+def test_bidirectional_newer_file_wins(tmp_path: Path) -> None:
+    source = tmp_path / "source"
+    target = tmp_path / "target"
+    source.mkdir()
+    target.mkdir()
+    left = source / "datei.txt"
+    right = target / "datei.txt"
+    left.write_text("links", encoding="utf-8")
+    right.write_text("rechts", encoding="utf-8")
+    os.utime(left, ns=(2_000_000_000, 2_000_000_000))
+    os.utime(right, ns=(1_000_000_000, 1_000_000_000))
+    task = SyncTask(
+        name="Beide",
+        source=str(source),
+        target=str(target),
+        direction=SyncDirection.BIDIRECTIONAL,
+    )
+
+    result = _engine(tmp_path).synchronize(task)
+
+    assert result.successful
+    assert right.read_text(encoding="utf-8") == "links"
+
+
+def test_conflict_copy_preserves_replaced_version(tmp_path: Path) -> None:
+    source = tmp_path / "source"
+    target = tmp_path / "target"
+    source.mkdir()
+    target.mkdir()
+    left = source / "plan.txt"
+    right = target / "plan.txt"
+    left.write_text("neu", encoding="utf-8")
+    right.write_text("alt", encoding="utf-8")
+    os.utime(left, ns=(3_000_000_000, 3_000_000_000))
+    os.utime(right, ns=(1_000_000_000, 1_000_000_000))
+    task = SyncTask(
+        name="Konflikt",
+        source=str(source),
+        target=str(target),
+        direction=SyncDirection.BIDIRECTIONAL,
+        conflict_mode=ConflictMode.CONFLICT_COPY,
+    )
+
+    result = _engine(tmp_path).synchronize(task)
+
+    conflict_files = list(target.glob("plan_conflict_*.txt"))
+    assert result.successful
+    assert result.conflicts == 1
+    assert right.read_text(encoding="utf-8") == "neu"
+    assert conflict_files[0].read_text(encoding="utf-8") == "alt"
+
+
+def test_bidirectional_mirrors_known_deletion(tmp_path: Path) -> None:
+    source = tmp_path / "source"
+    target = tmp_path / "target"
+    source.mkdir()
+    target.mkdir()
+    (source / "entfernen.txt").write_text("inhalt", encoding="utf-8")
+    task = SyncTask(
+        name="Löschung",
+        source=str(source),
+        target=str(target),
+        direction=SyncDirection.BIDIRECTIONAL,
+        delete_mode=DeleteMode.MIRROR,
+    )
+    engine = _engine(tmp_path)
+    engine.synchronize(task)
+    (target / "entfernen.txt").unlink()
+
+    result = engine.synchronize(task)
+
+    assert result.successful
+    assert not (source / "entfernen.txt").exists()