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test(pt_expt): restore sys.modules snapshot in plugin entry-point test #5728

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test(pt_expt): restore sys.modules snapshot in plugin entry-point test #5728

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64c96dc
test(pt_expt): restore sys.modules snapshot in plugin entry-point test
Jul 3, 2026
69450a5
test(pt_expt): drop the freshly-bound pt_expt attr when it was absent
Jul 4, 2026
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32 changes: 31 additions & 1 deletion source/tests/pt_expt/test_plugin.py
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Original file line number Diff line number Diff line change
Expand Up @@ -22,12 +22,42 @@ def fake_entry_points(*, group=None):
return [_FakeEntryPoint(calls)]

monkeypatch.setattr(importlib.metadata, "entry_points", fake_entry_points)

# Snapshot the deepmd.pt_expt module tree BEFORE re-importing. Just popping
# "deepmd.pt_expt" and leaving its submodules cached poisons sys.modules
# for the rest of the pytest process: a later import of a cached submodule
# (e.g. deepmd.pt_expt.infer.deep_eval) re-creates a BARE parent package
# whose submodule attributes (utils/infer/...) are never rebound, and
# mock.patch("deepmd.pt_expt.utils...") then fails with AttributeError on
# py3.10 (shard-order dependent CI failure).
saved = {
k: v
for k, v in sys.modules.items()
if k == "deepmd.pt_expt" or k.startswith("deepmd.pt_expt.")
}
deepmd_pkg = sys.modules.get("deepmd")
sys.modules.pop("deepmd.pt_expt", None)

try:
importlib.import_module("deepmd.pt_expt")
finally:
sys.modules.pop("deepmd.pt_expt", None)
# drop everything the fresh import created, then restore the snapshot
# (including the parent-package attribute binding).
for k in [
m
for m in list(sys.modules)
if m == "deepmd.pt_expt" or m.startswith("deepmd.pt_expt.")
]:
sys.modules.pop(k, None)
sys.modules.update(saved)
if deepmd_pkg is not None:
if "deepmd.pt_expt" in saved:
deepmd_pkg.pt_expt = saved["deepmd.pt_expt"]
elif hasattr(deepmd_pkg, "pt_expt"):
# deepmd.pt_expt was not imported before this test; the fresh
# import bound it onto the parent package, so drop that stale
# attribute to leave the parent exactly as we found it.
delattr(deepmd_pkg, "pt_expt")

assert groups == ["deepmd.pt_expt"]
assert calls == ["load"]
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