"""Tests for CommsLogEntry in src/type_aliases.py

Per-aggregate dataclass regression-guard for the metadata_promotion_20260624 track.

CONVENTION: 1-space indentation. NO COMMENTS.
"""
from __future__ import annotations

from dataclasses import FrozenInstanceError

import pytest

from src.type_aliases import CommsLogEntry


def test_constructor_with_kwargs() -> None:
 entry = CommsLogEntry(role="user", content="hi", source_tier="tier1")
 assert entry.role == "user"
 assert entry.content == "hi"
 assert entry.source_tier == "tier1"


def test_field_access() -> None:
 entry = CommsLogEntry(role="assistant", model="claude-3")
 assert entry.model == "claude-3"


def test_frozen_raises_on_mutation() -> None:
 entry = CommsLogEntry()
 with pytest.raises(FrozenInstanceError):
  entry.role = "user"


def test_to_dict_from_dict_roundtrip() -> None:
 entry = CommsLogEntry(role="user", content="hi", source_tier="tier1")
 restored = CommsLogEntry.from_dict(entry.to_dict())
 assert restored == entry


def test_from_dict_filters_unknown_keys() -> None:
 raw = {"role": "user", "content": "hi", "unknown_key": "ignored"}
 entry = CommsLogEntry.from_dict(raw)
 assert entry.role == "user"
 assert entry.content == "hi"


def test_default_values() -> None:
 entry = CommsLogEntry()
 assert entry.role == "user"
 assert entry.ts == ""
 assert entry.error == ""


def test_hashability() -> None:
 entry = CommsLogEntry(role="user")
 assert hash(entry) is not None