Fix mock_open() expectations for Python 3.13+

Python 3.13 introduces a behavior change in unittest.mock.mock_open(),
which now calls close() when exiting the context manager
as described in bpo-44185 [1]. This causes additional mock calls to appear,
breaking strict mock_calls assertions.

This patch fix tests and add compatibility for Python 3.13.

From mock documentation [2]:
  "bpo-44185: unittest.mock.mock_open() will call the close() method
   of the file handle mock when it is exiting from the context manager.
   Patch by Samet Yaslan."

[1] https://bugs.python.org/issue44185
[2] https://mock.readthedocs.io/en/latest/changelog.html

Change-Id: Ib8e2a8a20a828c4c69deedd307c9b726f51489f8

0 files changed, 0 insertions, 0 deletions