curo1305
eaed52006f
Atomic write-then-rename, stale-PID detection via os.kill on POSIX and ctypes.OpenProcess on Windows, context manager for cleanup on exit. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
104 lines
2.9 KiB
Python
104 lines
2.9 KiB
Python
"""Unit tests for daemon PID file management."""
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from __future__ import annotations
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import os
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from pathlib import Path
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import pytest
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from pyra.daemon.pid import PidFile, PidFileError, resolve_pid_path
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def test_write_creates_file(tmp_path: Path) -> None:
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p = PidFile(tmp_path / "daemon.pid")
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p.write()
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assert (tmp_path / "daemon.pid").exists()
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assert int((tmp_path / "daemon.pid").read_text().strip()) == os.getpid()
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def test_read_returns_none_when_absent(tmp_path: Path) -> None:
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p = PidFile(tmp_path / "daemon.pid")
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assert p.read() is None
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def test_read_returns_pid_when_present(tmp_path: Path) -> None:
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pid_file = tmp_path / "daemon.pid"
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pid_file.write_text("12345")
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p = PidFile(pid_file)
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assert p.read() == 12345
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def test_read_returns_none_on_bad_content(tmp_path: Path) -> None:
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pid_file = tmp_path / "daemon.pid"
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pid_file.write_text("not-a-number")
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p = PidFile(pid_file)
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assert p.read() is None
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def test_is_stale_false_for_self(tmp_path: Path) -> None:
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p = PidFile(tmp_path / "daemon.pid")
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p.write()
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assert not p.is_stale()
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def test_is_stale_true_for_dead_pid(tmp_path: Path) -> None:
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pid_file = tmp_path / "daemon.pid"
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pid_file.write_text("999999999") # unrealistically large PID
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p = PidFile(pid_file)
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assert p.is_stale()
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def test_is_stale_false_when_file_absent(tmp_path: Path) -> None:
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p = PidFile(tmp_path / "daemon.pid")
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assert not p.is_stale()
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def test_remove_deletes_file(tmp_path: Path) -> None:
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p = PidFile(tmp_path / "daemon.pid")
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p.write()
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p.remove()
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assert not (tmp_path / "daemon.pid").exists()
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def test_remove_is_idempotent(tmp_path: Path) -> None:
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p = PidFile(tmp_path / "daemon.pid")
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p.remove() # must not raise
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def test_context_manager_writes_and_removes(tmp_path: Path) -> None:
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pid_file = tmp_path / "daemon.pid"
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p = PidFile(pid_file)
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with p:
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assert pid_file.exists()
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assert int(pid_file.read_text().strip()) == os.getpid()
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assert not pid_file.exists()
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def test_write_raises_when_live_pid_exists(tmp_path: Path) -> None:
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p = PidFile(tmp_path / "daemon.pid")
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p.write() # writes self PID (which is alive)
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p2 = PidFile(tmp_path / "daemon.pid")
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with pytest.raises(PidFileError):
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p2.write()
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def test_write_succeeds_over_stale_pid(tmp_path: Path) -> None:
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pid_file = tmp_path / "daemon.pid"
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pid_file.write_text("999999999") # stale
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p = PidFile(pid_file)
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p.write() # should not raise
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assert int(pid_file.read_text().strip()) == os.getpid()
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def test_resolve_pid_path_expands_tilde() -> None:
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result = resolve_pid_path("~/.pyra/daemon.pid")
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assert not str(result).startswith("~")
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assert result.is_absolute()
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def test_resolve_pid_path_absolute_unchanged(tmp_path: Path) -> None:
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path = tmp_path / "daemon.pid"
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result = resolve_pid_path(str(path))
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assert result == path
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