René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"test_modulefinder always modifies execution environment","articleBody":"**Bug report**\r\n\r\n``test_modulefinder`` creates a temporary directory in its global module scope\r\n\r\nhttps://github.com/python/cpython/blob/22df2e0322300d25c1255ceb73cacc0ebd96b20e/Lib/test/test_modulefinder.py#L13-L14\r\n\r\nand removes the temporary directory in each test method\r\n\r\nhttps://github.com/python/cpython/blob/22df2e0322300d25c1255ceb73cacc0ebd96b20e/Lib/test/test_modulefinder.py#L349-L350\r\n\r\nIf 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:\r\n\r\n```\r\n/python-wasm/cpython/builddir/wasi# wasmtime run --mapdir .::../../ -- python.wasm -m test --fail-env-changed test_modulefinder\r\n0:00:00 Run tests sequentially\r\n0:00:00 [1/1] test_modulefinder\r\nWarning -- files was modified by test_modulefinder\r\nWarning --   Before: ['tmp8avdrxn0/']\r\nWarning --   After:  [] \r\ntest_modulefinder failed (env changed)\r\n\r\n== Tests result: ENV CHANGED ==\r\n\r\n1 test altered the execution environment:\r\n    test_modulefinder\r\n\r\nTotal duration: 292 ms\r\nTests result: ENV CHANGED\r\n```\r\n\r\n``test_modulefinder`` should create the temporary directory in setUp and rmtree it in tearDown methods instead.","author":{"url":"https://github.com/tiran","@type":"Person","name":"tiran"},"datePublished":"2022-06-08T20:30:13.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":0},"url":"https://github.com/93616/cpython/issues/93616"}