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https://github.com/l5yth/potato-mesh.git
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204 lines
8.4 KiB
Python
204 lines
8.4 KiB
Python
# Copyright © 2025-26 l5yth & contributors
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""Unit tests for the ``MESH_UDP_GROUP`` multicast-group list (issue #903).
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Meshtastic firmware 2.8 sends "Mesh via UDP" to ``239.0.0.69`` and earlier
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firmware to ``224.0.0.69``, with no fallback either way, so the UDP transport
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joins both by default and :envvar:`MESH_UDP_GROUP` accepts a comma-separated
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list, validated at import time like ``PRIMARY_CHANNEL_KEY`` (ACCEPTANCE UH-A1).
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The packaged deployment defaults are pinned here as well: the image ``ENV``
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and the Nix option override the code default, so a stale single-group default
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there would keep every such deployment deaf to one firmware line.
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"""
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from __future__ import annotations
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import importlib
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import re
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import sys
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from pathlib import Path
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import pytest
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REPO_ROOT = Path(__file__).resolve().parents[1]
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if str(REPO_ROOT) not in sys.path:
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sys.path.insert(0, str(REPO_ROOT))
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import data.mesh_ingestor.config as config
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#: The shipped default, spelled out rather than read back from ``config`` so a
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#: change to the default has to be made here deliberately.
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EXPECTED_GROUPS = ("239.0.0.69", "224.0.0.69")
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#: :data:`EXPECTED_GROUPS` as an operator writes it in ``MESH_UDP_GROUP``.
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EXPECTED_SETTING = ",".join(EXPECTED_GROUPS)
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@pytest.fixture
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def load_config(monkeypatch):
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"""Reload ``config`` under a given ``MESH_UDP_GROUP``; restore defaults after.
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Yields a callable taking the raw value (``None`` unsets the variable) that
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reloads the module and returns it, so import-time parsing and validation
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run exactly as they do at ingestor startup.
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"""
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def _load(value: str | None):
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"""Reload ``config`` with *value* as ``MESH_UDP_GROUP`` (``None`` unsets it)."""
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if value is None:
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monkeypatch.delenv("MESH_UDP_GROUP", raising=False)
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else:
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monkeypatch.setenv("MESH_UDP_GROUP", value)
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return importlib.reload(config)
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yield _load
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monkeypatch.delenv("MESH_UDP_GROUP", raising=False)
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importlib.reload(config)
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class TestParseMeshUdpGroups:
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"""Tests for :func:`config._parse_mesh_udp_groups`."""
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def test_single_group(self):
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"""One address yields a one-group tuple, restricting the listener."""
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assert config._parse_mesh_udp_groups("224.0.0.69") == ("224.0.0.69",)
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def test_list_keeps_configured_order(self):
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"""A comma-separated list is split in the order it was written."""
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assert config._parse_mesh_udp_groups("224.0.0.69,239.0.0.69") == (
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"224.0.0.69",
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"239.0.0.69",
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)
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def test_whitespace_and_empty_segments_are_ignored(self):
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"""Padding is trimmed and empty segments are skipped, not rejected."""
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assert (
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config._parse_mesh_udp_groups(" 239.0.0.69 ,, 224.0.0.69 ,")
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== EXPECTED_GROUPS
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)
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def test_duplicates_collapse_onto_first_position(self):
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"""A repeated group is joined once, where it first appeared."""
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assert config._parse_mesh_udp_groups("224.0.0.69,239.0.0.69, 224.0.0.69") == (
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"224.0.0.69",
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"239.0.0.69",
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)
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@pytest.mark.parametrize("raw", ["", " ", ",", " , ", '""', "''"])
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def test_blank_falls_back_to_both_groups(self, raw):
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"""Blank, separator-only, or quote-only values mean the default.
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A quote-only value is what a Compose ``${VAR:-""}`` default delivers
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(see ``test_config_unit.TestComposeDefaults``); it carries no address.
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"""
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assert config._parse_mesh_udp_groups(raw) == EXPECTED_GROUPS
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@pytest.mark.parametrize("group", ["224.0.0.0", "239.255.255.255"])
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def test_multicast_block_boundaries_are_accepted(self, group):
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"""Both ends of ``224.0.0.0/4`` are valid groups."""
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assert config._parse_mesh_udp_groups(group) == (group,)
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@pytest.mark.parametrize(
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"entry",
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[
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"not-an-address",
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"10.0.0.1", # unicast
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"223.255.255.255", # just below the multicast block
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"240.0.0.1", # just above it (reserved)
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"255.255.255.255", # limited broadcast
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"239.0.0.256", # octet out of range
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"239.0.0.69:4403", # port belongs in MESH_UDP_PORT
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"ff02::1", # IPv6 multicast; the transport is IPv4-only
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'"239.0.0.69"', # quoted address: quotes are content, not stripped
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],
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)
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def test_non_multicast_entry_raises_naming_variable_and_entry(self, entry):
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"""Anything outside IPv4 ``224.0.0.0/4`` is rejected with a clear message."""
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with pytest.raises(ValueError) as excinfo:
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config._parse_mesh_udp_groups(f"239.0.0.69,{entry}")
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message = str(excinfo.value)
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assert "MESH_UDP_GROUP" in message
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assert repr(entry) in message
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class TestMeshUdpGroupsAtImport:
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"""Import-time resolution of :data:`config.MESH_UDP_GROUPS`."""
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def test_default_listens_on_both_groups(self, load_config):
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"""Unset, the ingestor joins the firmware 2.8+ group and the earlier one."""
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assert load_config(None).MESH_UDP_GROUPS == EXPECTED_GROUPS
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def test_list_is_normalised_into_both_names(self, load_config):
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"""The tuple and the comma-joined string agree after normalisation."""
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cfg = load_config(" 224.0.0.69 ,239.0.0.69,224.0.0.69")
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assert cfg.MESH_UDP_GROUPS == ("224.0.0.69", "239.0.0.69")
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assert cfg.MESH_UDP_GROUP == "224.0.0.69,239.0.0.69"
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def test_one_address_restricts_to_that_group(self, load_config):
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"""Setting a single address listens on that group only."""
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cfg = load_config("239.0.0.69")
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assert cfg.MESH_UDP_GROUPS == ("239.0.0.69",)
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assert cfg.MESH_UDP_GROUP == "239.0.0.69"
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def test_invalid_entry_fails_at_import(self, load_config):
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"""A bad entry stops startup instead of failing every reconnect.
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Without import-time validation the entry first fails inside
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``connect()``, which the daemon's generic handler retries forever
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(the failure mode ACCEPTANCE UH-A1 closed for ``PRIMARY_CHANNEL_KEY``).
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"""
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with pytest.raises(ValueError, match="MESH_UDP_GROUP entry '10.0.0.1'"):
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load_config("239.0.0.69,10.0.0.1")
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def test_both_names_are_exported(self):
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"""The parsed tuple joins the string setting on the public surface."""
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assert {"MESH_UDP_GROUP", "MESH_UDP_GROUPS"} <= set(config.__all__)
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class TestMeshUdpGroupDeploymentSurface:
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"""Every packaged default delivers both groups, or defers to the code.
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A packaged default overrides :data:`config.DEFAULT_MESH_UDP_GROUPS`, so a
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surface still pinning ``224.0.0.69`` alone would silently keep that whole
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deployment path on one group.
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"""
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def test_image_stages_default_to_both_groups(self):
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"""Both ``data/Dockerfile`` stages declare the full default list."""
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text = (REPO_ROOT / "data" / "Dockerfile").read_text(encoding="utf-8")
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assert re.findall(r"^\s*MESH_UDP_GROUP=(\S+)", text, re.MULTILINE) == [
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EXPECTED_SETTING,
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EXPECTED_SETTING,
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]
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def test_nix_option_defaults_to_both_groups(self):
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"""The NixOS ``meshUdpGroup`` option defaults to the full list."""
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text = (REPO_ROOT / "flake.nix").read_text(encoding="utf-8")
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match = re.search(
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r'meshUdpGroup = lib\.mkOption \{.*?default = "([^"]*)";', text, re.S
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)
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assert match, "flake.nix no longer declares the meshUdpGroup option"
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assert match.group(1) == EXPECTED_SETTING
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@pytest.mark.parametrize(
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"path", ["docker-compose.yml", "data/tools/compose.udp.pi.yml"]
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)
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def test_compose_default_is_bare_or_both_groups(self, path):
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"""A Compose default is either bare (code default) or the full list."""
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text = (REPO_ROOT / path).read_text(encoding="utf-8")
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match = re.search(r"MESH_UDP_GROUP:\s*\$\{MESH_UDP_GROUP:-([^}]*)\}", text)
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assert match, f"{path} no longer passes MESH_UDP_GROUP through"
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assert match.group(1) in ("", EXPECTED_SETTING)
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