test(bootstrap): make cache-dir assertion version-agnostic (#48)

ensure_native_loaded's cache dir is keyed on the module's __version__,
not the version argument. The test hardcoded "3.2.1", so the 3.3.0
version bump broke it and blocked the publish-python-bootstrap job
(which runs the bootstrap unit tests before twine upload), which in
turn skipped github-release.

Reference _bootstrap.__version__ directly, matching the sibling
CacheDirTests, so the assertion can't go stale on future bumps.

Co-authored-by: Claude <claude@anthropic.com>

Author: ZhiXiao-Lin

sdk/python-bootstrap/tests/test_bootstrap.py

@@ -186,7 +186,11 @@ def fake_get(url: str) -> bytes:
         ):
             cache = _bootstrap.ensure_native_loaded("3.2.1")
 
-        self.assertEqual(cache, Path(self._tmp) / "3.2.1")
+        # `_cache_root()` keys the cache dir on the module's own __version__,
+        # not the version arg passed to `ensure_native_loaded`. Reference it
+        # directly so this assertion can't go stale on a version bump (the
+        # sibling CacheDirTests follow the same pattern).
+        self.assertEqual(cache, Path(self._tmp) / _bootstrap.__version__)
         # Native file extracted at cache root, not under a subdirectory.
         extracted = list(cache.glob("_native.*"))
         self.assertEqual(len(extracted), 1)