test_modulefinder always modifies execution environment #93616
Description
Bug report
test_modulefinder creates a temporary directory in its global module scope
cpython/Lib/test/test_modulefinder.py
Lines 13 to 14 in 22df2e0
and removes the temporary directory in each test method
cpython/Lib/test/test_modulefinder.py
Lines 349 to 350 in 22df2e0
If the test is executed in an environment without test worker processes (e.g. WASI) then the test runner complains about changes to the execution environment:
/python-wasm/cpython/builddir/wasi# wasmtime run --mapdir .::../../ -- python.wasm -m test --fail-env-changed test_modulefinder
0:00:00 Run tests sequentially
0:00:00 [1/1] test_modulefinder
Warning -- files was modified by test_modulefinder
Warning -- Before: ['tmp8avdrxn0/']
Warning -- After: []
test_modulefinder failed (env changed)
== Tests result: ENV CHANGED ==
1 test altered the execution environment:
test_modulefinder
Total duration: 292 ms
Tests result: ENV CHANGED
test_modulefinder should create the temporary directory in setUp and rmtree it in tearDown methods instead.