supervisor/tests/common.py
Mike Degatano 0958cd0c06
Switch from dbus-next to dbus-fast (#3882)
* Switch to dbus-fast

* dbus-fast==1.6.0
2022-09-21 09:24:04 +02:00

84 lines
2.7 KiB
Python

"""Common test functions."""
import asyncio
import json
from pathlib import Path
from typing import Any
from dbus_fast.introspection import Method, Property, Signal
from supervisor.dbus.interface import DBusInterface, DBusInterfaceProxy
from supervisor.utils.dbus import DBUS_INTERFACE_PROPERTIES
def get_dbus_name(intr_list: list[Method | Property | Signal], snake_case: str) -> str:
"""Find name in introspection list, fallback to ignore case match."""
name = "".join([part.capitalize() for part in snake_case.split("_")])
names = [item.name for item in intr_list]
if name in names:
return name
# Acronyms like NTP can't be easily converted back to camel case. Fallback to ignore case match
lower_name = name.lower()
for val in names:
if lower_name == val.lower():
return val
raise AttributeError(f"Could not find match for {name} in D-Bus introspection!")
def fire_watched_signal(dbus: DBusInterface, signal: str, data: list[Any] | str):
"""Test firing a watched signal."""
if isinstance(data, str) and exists_fixture(data):
data = load_json_fixture(data)
if not isinstance(data, list):
raise ValueError("Data must be a list!")
signal_parts = signal.split(".")
interface = ".".join(signal_parts[:-1])
name = signal_parts[-1]
# pylint: disable=protected-access
assert interface in dbus.dbus._signal_monitors
signals = dbus.dbus._proxies[interface].introspection.signals
signal_monitors = {
get_dbus_name(signals, k): v
for k, v in dbus.dbus._signal_monitors[interface].items()
}
assert name in signal_monitors
for coro in [callback(*data) for callback in signal_monitors[name]]:
asyncio.create_task(coro)
def fire_property_change_signal(
dbus: DBusInterfaceProxy,
changed: dict[str, Any] | None = None,
invalidated: list[str] | None = None,
):
"""Fire a property change signal for an interface proxy."""
fire_watched_signal(
dbus,
f"{DBUS_INTERFACE_PROPERTIES}.PropertiesChanged",
[dbus.properties_interface, changed or {}, invalidated or []],
)
def load_json_fixture(filename: str) -> Any:
"""Load a json fixture."""
path = Path(Path(__file__).parent.joinpath("fixtures"), filename)
return json.loads(path.read_text(encoding="utf-8"))
def load_fixture(filename: str) -> str:
"""Load a fixture."""
path = Path(Path(__file__).parent.joinpath("fixtures"), filename)
return path.read_text(encoding="utf-8")
def exists_fixture(filename: str) -> bool:
"""Check if a fixture exists."""
path = Path(Path(__file__).parent.joinpath("fixtures"), filename)
return path.exists()