f287036ea3
Change-detectors, tautologies, source-reading tests, redundant duplicates, mock-echo tests and dead/unrunnable tests. Per-test rationale in the lane ledger (category + reason for every removal).
89 lines
3.1 KiB
Python
89 lines
3.1 KiB
Python
"""Verify that TUI-context subprocess calls specify stdin=.
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This is the pytest wrapper for scripts/check_subprocess_stdin.py.
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It runs as part of the test suite so CI catches regressions when new
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subprocess calls are added without stdin=subprocess.DEVNULL.
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"""
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import importlib.util
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import subprocess
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import sys
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from pathlib import Path
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REPO_ROOT = Path(__file__).resolve().parents[2]
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SCRIPT = REPO_ROOT / "scripts" / "check_subprocess_stdin.py"
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def _load_guard():
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spec = importlib.util.spec_from_file_location("_stdin_guard", SCRIPT)
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assert spec is not None and spec.loader is not None
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mod = importlib.util.module_from_spec(spec)
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spec.loader.exec_module(mod)
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return mod
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def test_all_tui_subprocess_calls_have_stdin():
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"""Every subprocess.run/Popen in TUI-context code must set stdin=."""
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result = subprocess.run(
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[sys.executable, str(SCRIPT)],
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capture_output=True,
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text=True,
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timeout=30,
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)
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assert result.returncode == 0, (
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f"subprocess stdin= check failed:\n{result.stdout}\n{result.stderr}"
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)
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def test_inline_noqa_marker_exempts_a_call():
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"""The guard honors an inline 'noqa: subprocess-stdin' exemption marker."""
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guard = _load_guard()
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flagged = guard.find_subprocess_calls(
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"import subprocess\nsubprocess.run(['ls'])\n", "x.py"
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)
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assert len(flagged) == 1, "unmarked missing-stdin call should be flagged"
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exempt = guard.find_subprocess_calls(
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"import subprocess\nsubprocess.run(['ls']) # noqa: subprocess-stdin\n",
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"x.py",
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)
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assert exempt == [], "inline marker should exempt the call"
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def test_splatted_kwargs_helper_counts_only_when_it_sets_stdin():
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"""``**_KW`` / ``**_kw()`` splats are safe only when the same-file definition sets stdin=."""
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guard = _load_guard()
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safe_const = (
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"import subprocess\n"
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"_KW = dict(capture_output=True, stdin=subprocess.DEVNULL)\n"
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"subprocess.run(['ls'], **_KW)\n"
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)
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safe_fn = (
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"import subprocess\n"
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"def _kw(timeout):\n"
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" return dict(timeout=timeout, stdin=subprocess.DEVNULL)\n"
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"subprocess.run(['ls'], **_kw(3))\n"
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)
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unsafe_const = (
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"import subprocess\n"
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"_KW = dict(capture_output=True, text=True)\n"
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"subprocess.run(['ls'], **_KW)\n"
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)
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undefined = "import subprocess\nsubprocess.run(['ls'], **_KW)\n"
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# A later unrelated call passing stdin= must NOT vouch for the splat (reviewer-found false negative
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# in the 30-line text-window version).
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unrelated_later = (
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"import subprocess\n"
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"kwargs = {'capture_output': True}\n"
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"subprocess.run(['child'], **kwargs)\n"
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"subprocess.run(['other'], stdin=subprocess.DEVNULL)\n"
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)
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assert guard.find_subprocess_calls(safe_const, "x.py") == []
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assert guard.find_subprocess_calls(safe_fn, "x.py") == []
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assert len(guard.find_subprocess_calls(unsafe_const, "x.py")) == 1
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assert len(guard.find_subprocess_calls(undefined, "x.py")) == 1
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assert [v["line"] for v in guard.find_subprocess_calls(unrelated_later, "x.py")] == [3]
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