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PR_SET_PDEATHSIG on the spawned lightpanda mcp process (Linux) so a SIGKILLed or crashed interpreter cannot leak a browser process — a 2h44m orphan surfaced during the v6 benchmark campaign. Regression test kills a parent and asserts the sidecar exits.
112 lines
3.6 KiB
Python
112 lines
3.6 KiB
Python
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 time
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from pathlib import Path
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import pytest
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from lightpanda import ToolError, run_script
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def test_goto_and_markdown(browser, fixture_url):
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page = browser.new_session()
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page.goto(url=f"{fixture_url}/index.html")
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text = page.markdown()
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assert "Hello from the fixture" in text
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page.close()
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def test_extract_dict_schema(browser, fixture_url):
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with browser.new_session() as page:
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page.goto(url=f"{fixture_url}/index.html")
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data = page.extract(schema={"headline": "#headline", "items": [".item a"]})
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assert data["headline"] == "Hello from the fixture"
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assert data["items"] == ["First item", "Second item", "Third item"]
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def test_evaluate(browser, fixture_url):
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with browser.new_session() as page:
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page.goto(url=f"{fixture_url}/index.html")
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assert page.evaluate(script="1 + 2") == 3
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assert page.evaluate(script="document.title") == "Fixture Home"
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def test_snake_case_alias(browser, fixture_url):
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with browser.new_session() as page:
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page.goto(url=f"{fixture_url}/index.html")
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assert page.get_url() == page.getUrl()
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def test_sessions_are_isolated(browser, fixture_url):
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with browser.new_session() as a, browser.new_session() as b:
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a.goto(url=f"{fixture_url}/index.html")
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b.goto(url=f"{fixture_url}/other.html")
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assert a.get_url().endswith("/index.html")
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assert b.get_url().endswith("/other.html")
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def test_tool_error_raises(browser, fixture_url):
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with browser.new_session() as page:
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page.goto(url=f"{fixture_url}/index.html")
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with pytest.raises(ToolError):
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page.extract(schema={"nope": "#does-not-exist"})
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def test_unknown_tool_raises(browser):
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with browser.new_session() as page:
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with pytest.raises(ToolError, match="unknown tool"):
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page.call("teleport", where="moon")
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def test_extra_args_passthrough(binary, fixture_url, tmp_path):
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from lightpanda import Browser
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cache_dir = tmp_path / "cache"
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with Browser(binary=binary, args=["--http-cache-dir", str(cache_dir)]) as b:
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with b.new_session() as page:
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page.goto(url=f"{fixture_url}/index.html")
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assert "Hello" in page.markdown()
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assert cache_dir.exists()
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@pytest.mark.skipif(sys.platform != "linux", reason="PDEATHSIG is Linux-only")
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def test_sidecar_dies_with_killed_parent(binary, tmp_path):
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child_src = tmp_path / "spawn_and_hang.py"
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child_src.write_text(
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"import os, sys, time\n"
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"from lightpanda import Browser\n"
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"b = Browser(binary=sys.argv[1])\n"
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"print(b._client._proc.pid, flush=True)\n"
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"time.sleep(60)\n"
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)
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env = dict(os.environ, PYTHONPATH=str(Path(__file__).parent.parent))
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child = subprocess.Popen(
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[sys.executable, str(child_src), binary],
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stdout=subprocess.PIPE, text=True, env=env,
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)
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sidecar_pid = int(child.stdout.readline())
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assert _alive(sidecar_pid)
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os.kill(child.pid, signal.SIGKILL)
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child.wait()
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deadline = time.monotonic() + 5
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while time.monotonic() < deadline and _alive(sidecar_pid):
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time.sleep(0.1)
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assert not _alive(sidecar_pid), "sidecar survived its parent's SIGKILL"
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def _alive(pid):
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try:
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os.kill(pid, 0)
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return True
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except ProcessLookupError:
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return False
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def test_run_script(binary, fixture_url, tmp_path):
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script = tmp_path / "visit.js"
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script.write_text('const page = new Page();\nawait page.goto("$LP_TEST_URL");\n')
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run_script(script, env={"LP_TEST_URL": f"{fixture_url}/index.html"}, binary=binary)
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