utils.py: Add file timestamp helpers

1 files changed, 22 insertions, 1 deletions

diff --git a/tests/internals/utils_move_atomic.py b/tests/internals/utils_move_atomic.py
index cda020809..dd417cb66 100644
--- a/tests/internals/utils_move_atomic.py
+++ b/tests/internals/utils_move_atomic.py
@@ -3,7 +3,13 @@
 
 import pytest
 
-from buildstream.utils import move_atomic, DirectoryExistsError
+from buildstream.utils import (
+    move_atomic,
+    DirectoryExistsError,
+    _get_file_mtimestamp,
+    _set_file_mtime,
+    _parse_timestamp,
+)
 
 
 @pytest.fixture
@@ -89,3 +95,18 @@ def test_move_to_existing_non_empty_dir(src, tmp_path):
 
     with pytest.raises(DirectoryExistsError):
         move_atomic(src, dst)
+
+
+def test_move_to_empty_dir_set_mtime(src, tmp_path):
+    dst = tmp_path.joinpath("dst")
+    move_atomic(src, dst)
+    assert dst.joinpath("test").exists()
+    _dst = str(dst)
+    # set the mtime via stamp
+    timestamp1 = "2020-01-08T11:05:50.832123Z"
+    _set_file_mtime(_dst, _parse_timestamp(timestamp1))
+    assert timestamp1 == _get_file_mtimestamp(_dst)
+    # reset the mtime using an offset stamp
+    timestamp2 = "2010-02-12T12:05:50.832123+01:00"
+    _set_file_mtime(_dst, _parse_timestamp(timestamp2))
+    assert _get_file_mtimestamp(_dst) == "2010-02-12T11:05:50.832123Z"