Add regression test for issue #1027 #1069
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This test shows that MCP server cleanup code in lifespan doesn't run when the process is terminated, but does run when stdin is closed first (as implemented in PR #1044). The test includes: - Demonstration of current broken behavior (cleanup doesn't run) - Verification that stdin closure allows graceful shutdown - Windows-specific ResourceWarning handling - Detailed documentation of the issue and solution Github-Issue:#1027
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Motivation and Context
Issue #1027 reports that MCP server cleanup code (after yield in lifespan) is unreachable when the process is terminated. This PR adds tests that:
How Has This Been Tested?
Added two tests in
test_1027_win_unreachable_cleanup.py:test_lifespan_cleanup_executed- Shows cleanup doesn't run with current termination (xfails)test_stdin_close_triggers_cleanup- Shows cleanup works when stdin is closed first (passes)Tested on both macOS and Windows.
When run with PR #1091's changes, both tests pass.
Breaking Changes
None. Tests only.
Types of changes
Checklist
Additional context