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2bf79d0411
check_resources() listed /proc/self/fd, which only exists on Linux, so on macOS every scenario crashed at the end with FileNotFoundError. macOS now lists /dev/fd and resolves each descriptor with fcntl F_GETPATH, which, like /proc, still reports files that have been deleted (psutil's open_files() leaves those out). The temp directory is compared via realpath(), since macOS reports /var/folders as /private/var/folders. The test now fails with the harness's stderr when it exits without a summary line, instead of an IndexError that hid the real traceback. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
75 lines
2.4 KiB
Python
75 lines
2.4 KiB
Python
"""
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A fast, fixed-seed subset of the connection torture harness
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(tests/connection_torture.py). Each scenario runs in its own process, so a
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segfault or a hang fails one test instead of killing the test run.
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Several event loops (threads) drive one Datasette with extreme settings
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(smallest pool, 1ms idle timeout, 10ms schema polling) through reads,
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writes of every kind, DDL, isolated functions, analyze_sql, cancellation,
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add/remove_database, scratch databases, external schema changes, files
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replaced and deleted, Database.close() and Datasette.close() mid-flight,
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and non-threaded mode. See the harness docstring for what is checked.
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"""
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import json
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import os
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import signal
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import subprocess
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import sys
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import pytest
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HARNESS = os.path.join(os.path.dirname(__file__), "connection_torture.py")
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@pytest.mark.parametrize(
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"scenario,seed",
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[
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("mixed", 101),
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("lifecycle", 102),
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("close", 103),
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("cancel", 104),
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("pool", 105),
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("nothreads", 106),
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("writes", 107),
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],
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)
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def test_connection_torture(scenario, seed):
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try:
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proc = subprocess.run(
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[
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sys.executable,
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HARNESS,
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scenario,
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"--seed",
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str(seed),
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"--duration",
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"1.5",
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],
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capture_output=True,
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text=True,
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timeout=150,
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check=False,
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)
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except subprocess.TimeoutExpired as e: # pragma: no cover
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pytest.fail(f"{scenario} hung:\n{(e.stderr or '')[-4000:]}")
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if proc.returncode < 0: # pragma: no cover
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pytest.fail(
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f"{scenario} crashed with {signal.Signals(-proc.returncode).name}:\n"
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f"{proc.stderr[-4000:]}"
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)
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lines = proc.stdout.strip().splitlines()
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if not lines:
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pytest.fail(
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f"{scenario} exited {proc.returncode} without a summary:\n"
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f"{proc.stderr[-4000:]}"
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)
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summary = json.loads(lines[-1])
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problems = "\n".join(
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f"[{p['kind']}] {p['message'][:600]}" for p in summary["problems"]
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)
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assert proc.returncode == 0, f"{scenario} seed {seed}:\n{problems}"
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assert summary["ok"]
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# It did something (the slow-query scenarios do a few dozen operations
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# in 1.5s on a busy machine, the others hundreds)
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assert sum(summary["counts"].values()) > 10
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