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🧪 test: tolerate a preloaded sqlite3 - #894
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The FreeBSD environment in #864 loads sqlite3 before filelock through a site hook, so the lazy-import check reported ['sqlite3'] although filelock never imported it, and the missing-sqlite3 checks could not hide a module that was already cached. The lazy-import check now counts only the modules the import adds, and the missing-module checks evict a preloaded sqlite3 before installing the finder that hides it.
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The FreeBSD run in #864 failed
test_lazy_import_skips_asyncio_and_sqlite3with['sqlite3']: a site hook in that environment loadedsqlite3at interpreter start, before filelock was imported. A.pthfile that importssqlite3reproduces it, and the same preload breaks the missing-sqlite3checks, because a finder cannot hide a module that is already cached.The lazy-import check now counts only the modules that importing filelock adds, and the missing-module checks evict a preloaded
sqlite3before installing the finder that hides it. Library behavior is unchanged.