diet-guard/diet_guard/tests/test_mcp.py
Krzysztof kuhy Rudnicki f7f06aee53
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Remove unused features; fix reminder false alarms; share all state
Four asks, plus the fixes two review passes turned up.

Removals (all unused):
- "Repeat last meal" button, and the reward/temptation-bundling prompt it
  was the sole trigger for. Replaced with a post-log progress card showing
  kcal against budget, macros, and the adherence streak.
- The multi-item meal builder, on both the gate and the phone. The stored
  `components` field stays: nothing writes it now, but historical composite
  entries and the food bank still read it and it is part of the wire format.
- Meal photos entirely: 13 files, `imagePath`, the photo filter, the
  wrapper's /blobs/ route, image_picker, and the CAMERA permission.

Reminder false alarms had three real causes, all fixed:
- Logging never reconciled notifications, so a reminder sat on screen up to
  15 minutes after the meal was logged -- on the phone itself.
- The background check never pulled, so a PC-logged meal nagged forever
  until the app was opened. Now mirrors _cli_gate._should_lock: cheap local
  check, network only when a slot looks due, then re-check.
- Meals before 08:00 / after 22:00 were attributed to no slot at all. New
  slot_for_log/slotForLog clamps them to the first/last slot, byte-identical
  across Python and Dart. Deliberately separate from elapsed_slots, which
  would otherwise make every slot fall due at 23:00.

Budget history, so lowering the budget stops rewriting the past:
- Forward-only (effective_from, kcal) entries; each day is judged against
  the budget in force then. Verified live: setting 2000 left a 36-day
  adherence streak and the whole calendar pixel-identical.
- Rides as hist:<date> fields on the existing budget record. crdt_sync
  merges per-field over the union of field names and both devices push the
  merged log, so a device that predates the feature relays them untouched --
  no coordinated rollout, no second document.
- The seed guard tests emptiness, not file presence: _sync can write an
  empty history after merging with a pre-feature peer, and a presence check
  would then never seed again, silently reclassifying every past day.

One shared source of truth for every piece of data:
- Body weight now travels as its own `weight` CRDT field. Inside `value` it
  was collateral damage of whole-map LWW -- any phone budget edit deleted it,
  and the protein target with it.
- Both halves of the food bank sync. The curated half (foods added without
  eating them) was the last device-local state. The derived half merges with
  count as the clock, so LWW means max-count-wins; the log stays
  authoritative for membership, because a CRDT union never shrinks and a
  peer's stale copy would otherwise resurrect a deleted food permanently.
- Bank adapters honour tombstones, and Dart parses bank records defensively:
  a cast failure there is an Error, not an Exception, so one malformed
  remote record would have broken phone sync permanently.

_test_guard.py blocks any pathlib write to real user state while pytest is
in the process, whatever conftest is loaded. A throwaway test run outside
the package conftest destroyed a real GitHub token during this work; this
makes that class of accident impossible rather than merely discouraged.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
2026-07-26 16:39:52 +02:00

196 lines
7.3 KiB
Python

"""Tests for the MCP server tools in ``_mcp``.
Leaf helpers are patched at the ``_mcp`` module namespace (where they are
imported), keeping each tool's own logic under test while isolating the
already-tested state/resolution functions. No test touches the real food log,
budget seal, or shared HMAC key.
"""
from __future__ import annotations
from unittest.mock import patch
from diet_guard import _mcp
from diet_guard._budget import BudgetNotInitializedError
from diet_guard._estimator import Nutrition
def _nutrition(kcal: float = 250.0) -> Nutrition:
return Nutrition(
kcal=kcal,
protein_g=10.0,
carbs_g=20.0,
fat_g=5.0,
grams=150.0,
source="manual",
)
class TestGetStatus:
def test_band_and_intake(self) -> None:
with (
patch.object(_mcp, "today_total_kcal", return_value=640.0),
patch.object(_mcp, "today_total_macros", return_value=(30.0, 50.0, 12.0)),
patch.object(_mcp, "consumption_band", return_value="on track"),
patch.object(_mcp, "due_slots", return_value=(12,)),
patch.object(_mcp, "logged_slots_today", return_value={8}),
patch.object(_mcp, "current_slot", return_value=12),
patch.object(_mcp, "now_local"),
patch.object(_mcp, "slot_label", return_value="12:00"),
):
out = _mcp.get_status()
assert out["consumed_kcal"] == 640.0
assert out["consumed_macros_g"] == {"protein": 30.0, "carbs": 50.0, "fat": 12.0}
assert out["consumption_band"] == "on track"
assert out["budget_initialized"] is True
assert out["due_slots"] == ["12:00"]
assert out["logged_slots"] == [8]
assert out["current_slot"] == 12
def test_no_budget_hides_band(self) -> None:
with (
patch.object(_mcp, "today_total_kcal", return_value=0.0),
patch.object(_mcp, "today_total_macros", return_value=(0.0, 0.0, 0.0)),
patch.object(
_mcp,
"consumption_band",
side_effect=BudgetNotInitializedError(),
),
patch.object(_mcp, "due_slots", return_value=()),
patch.object(_mcp, "logged_slots_today", return_value=set()),
patch.object(_mcp, "current_slot", return_value=None),
patch.object(_mcp, "now_local"),
):
out = _mcp.get_status()
assert out["consumption_band"] is None
assert out["budget_initialized"] is False
assert out["due_slots"] == []
assert out["logged_slots"] == []
class TestListToday:
def test_projects_entries_and_drops_hmac(self) -> None:
entries = [
{
"time": "2026-07-10T12:30:00",
"desc": "big mac",
"kcal": 550.0,
"protein_g": 25.0,
"carbs_g": 45.0,
"fat_g": 30.0,
"grams": 215.0,
"source": "openfoodfacts: Big Mac",
"slot": 12,
"hmac": "deadbeef",
},
]
with patch.object(_mcp, "today_entries", return_value=entries):
out = _mcp.list_today()
assert out["count"] == 1
view = out["entries"][0]
assert view["desc"] == "big mac"
assert view["kcal"] == 550.0
assert view["slot"] == 12
assert "hmac" not in view
def test_empty(self) -> None:
with patch.object(_mcp, "today_entries", return_value=[]):
out = _mcp.list_today()
assert out == {"count": 0, "entries": []}
class TestGetSlots:
def test_lists_slots_and_current(self) -> None:
with (
patch.object(_mcp, "day_slots", return_value=(8, 12, 16, 20)),
patch.object(_mcp, "current_slot", return_value=16),
patch.object(_mcp, "now_local"),
patch.object(_mcp, "slot_label", side_effect=lambda s: f"{s:02d}:00"),
):
out = _mcp.get_slots()
assert out["current_slot"] == 16
assert out["day_slots"][0] == {"hour": 8, "label": "08:00"}
assert len(out["day_slots"]) == 4
class TestLogMealGate:
def test_unresolvable_returns_reason(self) -> None:
with patch.object(_mcp, "resolve_nutrition", return_value=None):
out = _mcp.log_meal("mystery stew")
assert out["ok"] is False
assert "could not resolve" in out["reason"]
def test_preview_manual_macros_does_not_mutate(self) -> None:
with (
patch.object(
_mcp, "resolve_nutrition", return_value=_nutrition()
) as resolve,
patch.object(_mcp, "ManualMacros") as manual,
patch.object(_mcp, "record_meal") as record,
):
out = _mcp.log_meal(
"protein shake",
macros=_mcp.Macros(kcal=180.0, protein=30.0, carbs=5.0, fat=2.0),
slot=12,
)
manual.assert_called_once_with(kcal=180.0, protein=30.0, carbs=5.0, fat=2.0)
resolve.assert_called_once_with(
"protein shake", grams=None, manual_macros=manual.return_value
)
record.assert_not_called()
assert out["preview"] is True
assert out["target_slot"] == 12
assert out["resolved"]["kcal"] == 250.0
assert out["confirm_required"] is True
def test_preview_no_manual_defaults_slot_to_current(self) -> None:
with (
patch.object(_mcp, "resolve_nutrition", return_value=_nutrition()),
patch.object(_mcp, "ManualMacros") as manual,
patch.object(_mcp, "slot_for_log", return_value=8),
patch.object(_mcp, "now_local"),
patch.object(_mcp, "record_meal") as record,
):
out = _mcp.log_meal("apple")
manual.assert_not_called()
record.assert_not_called()
assert out["preview"] is True
assert out["target_slot"] == 8
def test_confirm_applies_signed(self) -> None:
entry = {"desc": "apple", "hmac": "sig"}
with (
patch.object(_mcp, "resolve_nutrition", return_value=_nutrition()),
patch.object(_mcp, "record_meal", return_value=entry) as record,
):
out = _mcp.log_meal("apple", slot=8, confirm=True)
record.assert_called_once()
assert out["applied"] is True
assert out["signed"] is True
assert out["target_slot"] == 8
def test_confirm_applies_unsigned(self) -> None:
entry = {"desc": "apple"}
with (
patch.object(_mcp, "resolve_nutrition", return_value=_nutrition()),
patch.object(_mcp, "record_meal", return_value=entry),
):
out = _mcp.log_meal("apple", slot=8, confirm=True)
assert out["applied"] is True
assert out["signed"] is False
def test_confirm_write_failure_returns_gracefully(self) -> None:
with (
patch.object(_mcp, "resolve_nutrition", return_value=_nutrition()),
patch.object(_mcp, "record_meal", side_effect=OSError("disk full")),
):
out = _mcp.log_meal("apple", slot=8, confirm=True)
assert out["ok"] is False
assert "could not write" in out["reason"]
def test_main_runs_stdio_server() -> None:
with patch.object(_mcp.mcp, "run") as run:
_mcp.main()
run.assert_called_once_with()