baton/tests/test_biz_004.py

"""
BATON-BIZ-004: Verify removal of dead code from backend/telegram.py.

Acceptance criteria:
1. telegram.py does NOT contain duplicate logging setLevel calls for httpx/httpcore.
2. telegram.py does NOT contain the SignalAggregator class.
3. httpx/httpcore logging suppression is still configured in main.py (globally).
4. SignalAggregator is NOT importable from backend.telegram.
"""
from __future__ import annotations

import ast
import importlib
import inspect
import logging
import os
from pathlib import Path


# ---------------------------------------------------------------------------
# Helpers
# ---------------------------------------------------------------------------

_BACKEND_DIR = Path(__file__).parent.parent / "backend"
_TELEGRAM_SRC = (_BACKEND_DIR / "telegram.py").read_text(encoding="utf-8")
_MAIN_SRC = (_BACKEND_DIR / "main.py").read_text(encoding="utf-8")


# ---------------------------------------------------------------------------
# Criteria 1 — no setLevel for httpx/httpcore in telegram.py
# ---------------------------------------------------------------------------

def test_telegram_has_no_httpx_setlevel():
    """telegram.py must not set log level for 'httpx'."""
    assert 'getLogger("httpx").setLevel' not in _TELEGRAM_SRC
    assert "getLogger('httpx').setLevel" not in _TELEGRAM_SRC


def test_telegram_has_no_httpcore_setlevel():
    """telegram.py must not set log level for 'httpcore'."""
    assert 'getLogger("httpcore").setLevel' not in _TELEGRAM_SRC
    assert "getLogger('httpcore').setLevel" not in _TELEGRAM_SRC


# ---------------------------------------------------------------------------
# Criteria 2 — SignalAggregator absent from telegram.py source
# ---------------------------------------------------------------------------

def test_telegram_source_has_no_signal_aggregator_class():
    """telegram.py source text must not contain the class definition."""
    assert "class SignalAggregator" not in _TELEGRAM_SRC


def test_telegram_source_has_no_signal_aggregator_reference():
    """telegram.py source text must not reference SignalAggregator at all."""
    assert "SignalAggregator" not in _TELEGRAM_SRC


# ---------------------------------------------------------------------------
# Criteria 3 — httpx/httpcore suppression still lives in main.py
# ---------------------------------------------------------------------------

def test_main_suppresses_httpx_logging():
    """main.py must call getLogger('httpx').setLevel to suppress noise."""
    assert (
        'getLogger("httpx").setLevel' in _MAIN_SRC
        or "getLogger('httpx').setLevel" in _MAIN_SRC
    )


def test_main_suppresses_httpcore_logging():
    """main.py must call getLogger('httpcore').setLevel to suppress noise."""
    assert (
        'getLogger("httpcore").setLevel' in _MAIN_SRC
        or "getLogger('httpcore').setLevel" in _MAIN_SRC
    )


# ---------------------------------------------------------------------------
# Criteria 4 — SignalAggregator not importable from backend.telegram
# ---------------------------------------------------------------------------

def test_signal_aggregator_not_importable_from_telegram():
    """Importing SignalAggregator from backend.telegram must raise ImportError."""
    import importlib
    import sys

    # Force a fresh import so changes to the module are reflected
    mod_name = "backend.telegram"
    if mod_name in sys.modules:
        del sys.modules[mod_name]

    import backend.telegram as tg_mod  # noqa: F401
    assert not hasattr(tg_mod, "SignalAggregator"), (
        "SignalAggregator should not be an attribute of backend.telegram"
    )