Files
DECNET/tests/topology/test_editing.py
anti 91df57d36b feat(topology): pending-only mutation repo methods with cascade + guards
MazeNET phase 2 step 6. Equips the repo layer with the CRUD the web
editor needs before deploy.

- TopologyNotEditable exception: raised when a pending-only method hits
  a non-pending topology. The intent is "free-form edits stop at deploy;
  the mutator (step 7) takes over for live topologies."
- _assert_pending helper checks status inside the session.
- update_lan / update_topology_decky accept enforce_pending=True for
  pre-deploy callers (existing internal callers default to False so
  behavior is unchanged).
- delete_lan: cascades edges; refuses if any decky has only one edge
  (= this LAN is its home) to prevent orphans.
- delete_topology_decky: cascades edges.
- delete_topology_edge: bare-bones removal.

All four mutators accept expected_version for optimistic concurrency.
Existing tests continue to pass (no behavior change for persist/deploy).
2026-04-20 17:50:29 -04:00

133 lines
4.7 KiB
Python

"""Pre-deploy mutation repo methods: pending-only, version-aware."""
from __future__ import annotations
import pytest
from decnet.topology.config import TopologyConfig
from decnet.topology.generator import generate
from decnet.topology.persistence import persist, transition_status
from decnet.topology.status import TopologyNotEditable, TopologyStatus
from decnet.web.db.factory import get_repository
def _cfg(**kw) -> TopologyConfig:
base = dict(
name="edit",
depth=1,
branching_factor=1,
deckies_per_lan_min=2,
deckies_per_lan_max=2,
cross_edge_probability=0.0,
randomize_services=False,
services_explicit=["ssh"],
seed=6,
)
base.update(kw)
return TopologyConfig(**base)
@pytest.fixture
async def repo(tmp_path):
r = get_repository(db_path=str(tmp_path / "edit.db"))
await r.initialize()
return r
@pytest.mark.anyio
async def test_add_lan_to_pending_bumps_version(repo):
plan = generate(_cfg())
tid = await persist(repo, plan)
await repo.add_lan(
{"topology_id": tid, "name": "LAN-NEW", "subnet": "10.55.0.0/24", "is_dmz": False},
expected_version=1,
)
topo = await repo.get_topology(tid)
assert topo["version"] == 2
lans = {l["name"] for l in await repo.list_lans_for_topology(tid)}
assert "LAN-NEW" in lans
@pytest.mark.anyio
async def test_update_decky_roundtrips_service_config(repo):
plan = generate(_cfg())
tid = await persist(repo, plan)
decky = (await repo.list_topology_deckies(tid))[0]
patch = dict(decky["decky_config"])
patch["service_config"] = {"ssh": {"password": "megapassword"}}
await repo.update_topology_decky(
decky["uuid"], {"decky_config": patch}, expected_version=1,
)
fresh = next(
d for d in await repo.list_topology_deckies(tid)
if d["uuid"] == decky["uuid"]
)
assert fresh["decky_config"]["service_config"]["ssh"]["password"] == "megapassword"
@pytest.mark.anyio
async def test_update_decky_rejected_on_active_topology(repo):
plan = generate(_cfg())
tid = await persist(repo, plan)
decky = (await repo.list_topology_deckies(tid))[0]
# pending → deploying → active
await transition_status(repo, tid, TopologyStatus.DEPLOYING)
await transition_status(repo, tid, TopologyStatus.ACTIVE)
with pytest.raises(TopologyNotEditable) as ei:
await repo.update_topology_decky(
decky["uuid"],
{"decky_config": decky["decky_config"]},
enforce_pending=True,
)
assert ei.value.status == TopologyStatus.ACTIVE
@pytest.mark.anyio
async def test_delete_lan_with_home_decky_refused(repo):
"""A LAN whose decky has no other edge cannot be deleted — it'd orphan."""
plan = generate(_cfg(depth=1, branching_factor=1, deckies_per_lan_max=1, deckies_per_lan_min=1))
tid = await persist(repo, plan)
lan = (await repo.list_lans_for_topology(tid))[0]
with pytest.raises(ValueError, match="orphaned"):
await repo.delete_lan(lan["id"])
@pytest.mark.anyio
async def test_delete_edge_leaves_decky_intact(repo):
"""Deleting one bridge edge of a multi-homed decky should succeed."""
# depth=1 branching=1 gives DMZ(LAN-00) + LAN-01 with a bridge decky.
plan = generate(_cfg())
tid = await persist(repo, plan)
edges = await repo.list_topology_edges(tid)
bridge_edges = [e for e in edges if e["is_bridge"]]
assert bridge_edges, "generator should produce at least one bridge edge"
# Delete exactly one — the bridge decky should keep at least one edge.
edge = bridge_edges[0]
before_deckies = {d["uuid"] for d in await repo.list_topology_deckies(tid)}
await repo.delete_topology_edge(edge["id"])
after_deckies = {d["uuid"] for d in await repo.list_topology_deckies(tid)}
assert before_deckies == after_deckies
remaining = await repo.list_topology_edges(tid)
assert edge["id"] not in {e["id"] for e in remaining}
@pytest.mark.anyio
async def test_delete_decky_cascades_edges(repo):
plan = generate(_cfg())
tid = await persist(repo, plan)
decky = (await repo.list_topology_deckies(tid))[0]
await repo.delete_topology_decky(decky["uuid"])
# No edge pointing to the removed decky remains.
remaining = await repo.list_topology_edges(tid)
assert decky["uuid"] not in {e["decky_uuid"] for e in remaining}
@pytest.mark.anyio
async def test_delete_edge_rejected_on_active(repo):
plan = generate(_cfg())
tid = await persist(repo, plan)
edges = await repo.list_topology_edges(tid)
await transition_status(repo, tid, TopologyStatus.DEPLOYING)
await transition_status(repo, tid, TopologyStatus.ACTIVE)
with pytest.raises(TopologyNotEditable):
await repo.delete_topology_edge(edges[0]["id"])