Files
NestQuest/tests/test_api_host_zone.py
T

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Python

"""The API host's zone and the effective application timezone (task 7e173881).
With no zone stored the API reads its clock in the host's local time, so
:func:`api.host_zone.effective_timezone` names that host zone — resolved
the way the C library resolves local time — for the panel and admin app
to format in. Every host configuration here is a temporary file tree.
"""
from __future__ import annotations
from pathlib import Path
import pytest
from api import host_zone
def _host(tmp_path: Path, *, link: str | None = None, name: str | None = None):
"""A fake ``/etc``: ``localtime`` linked into a zoneinfo tree at
``link``, and/or an ``/etc/timezone`` file holding ``name``."""
localtime = tmp_path / "etc" / "localtime"
timezone_file = tmp_path / "etc" / "timezone"
localtime.parent.mkdir(parents=True)
if link is not None:
target = tmp_path / "usr" / "share" / "zoneinfo" / link
target.parent.mkdir(parents=True)
target.write_bytes(b"TZif")
localtime.symlink_to(target)
if name is not None:
timezone_file.write_text(f"{name}\n", encoding="utf-8")
return {"timezone_file": timezone_file, "localtime": localtime}
def test_tz_environment_variable_wins(tmp_path: Path) -> None:
paths = _host(tmp_path, link="Europe/Paris")
assert host_zone.host_timezone({"TZ": "Asia/Kolkata"}, **paths) == "Asia/Kolkata"
assert host_zone.host_timezone({"TZ": ":Asia/Kolkata"}, **paths) == "Asia/Kolkata"
assert host_zone.host_timezone({"TZ": ""}, **paths) == "UTC"
def test_localtime_link_names_the_zone(tmp_path: Path) -> None:
paths = _host(tmp_path, link="America/Argentina/Buenos_Aires")
assert host_zone.host_timezone({}, **paths) == "America/Argentina/Buenos_Aires"
def test_etc_timezone_names_a_copied_localtime(tmp_path: Path) -> None:
paths = _host(tmp_path, name="Pacific/Auckland")
paths["localtime"].write_bytes(b"TZif")
assert host_zone.host_timezone({}, **paths) == "Pacific/Auckland"
def test_unconfigured_host_runs_utc(tmp_path: Path) -> None:
assert host_zone.host_timezone({}, **_host(tmp_path)) == "UTC"
@pytest.mark.parametrize("tz", ["EST+5", "Not/AZone", ":/etc/localtime"])
def test_an_unnamed_host_zone_is_empty(tmp_path: Path, tz: str) -> None:
assert host_zone.host_timezone({"TZ": tz}, **_host(tmp_path)) == ""
def test_unnamed_copied_localtime_is_empty(tmp_path: Path) -> None:
paths = _host(tmp_path)
paths["localtime"].write_bytes(b"TZif")
assert host_zone.host_timezone({}, **paths) == ""
def test_effective_timezone_is_the_stored_zone_else_the_host_zone(
monkeypatch,
) -> None:
monkeypatch.setattr(host_zone, "host_timezone", lambda: "Europe/Dublin")
assert host_zone.effective_timezone("America/Chicago") == "America/Chicago"
assert host_zone.effective_timezone("") == "Europe/Dublin"