Import AITURK IDE 1.0.0-beta.1 from Hermes 63279301; preserve MIT license

tests/hermes_cli/test_update_zip_atomic_replace.py

@@ -0,0 +1,39 @@
+"""Regression: the ZIP-update directory replace must never leave a half-deleted tree.
+
+Issue #49145: on Windows the ZIP-update path did ``rmtree(dst); copytree(...)``.
+A copy that failed partway (file locks / flaky I/O — the very conditions the ZIP
+path exists to work around) left the directory deleted with nothing copied back,
+which broke ``hermes --tui`` because ``ui-tui/`` had vanished.
+
+``_atomic_replace_dir`` stages the new copy first and only swaps it in on full
+success, so a mid-copy failure leaves the original directory intact.
+"""
+
+from __future__ import annotations
+
+import shutil
+from pathlib import Path
+
+import pytest
+
+from hermes_cli.main import _atomic_replace_dir
+
+
+def test_atomic_replace_swaps_content_on_success(tmp_path: Path) -> None:
+    src = tmp_path / "src" / "ui-tui"
+    src.mkdir(parents=True)
+    (src / "new.txt").write_text("NEW")
+
+    dst = tmp_path / "install" / "ui-tui"
+    dst.mkdir(parents=True)
+    (dst / "old.txt").write_text("OLD")
+
+    _atomic_replace_dir(str(src), str(dst))
+
+    assert (dst / "new.txt").read_text() == "NEW"
+    assert not (dst / "old.txt").exists()
+    # No staging/backup siblings left behind.
+    assert not (dst.parent / "ui-tui.hermes-update-staging").exists()
+    assert not (dst.parent / "ui-tui.hermes-update-old").exists()
+
+