"""logger.py DTO 单元测试。

覆盖 ``LogLevel`` 枚举的取值、字符串继承与成员完整性。
"""

from __future__ import annotations

import pytest
from yuxi.channels.contract.dtos.logger import LogLevel

pytestmark = pytest.mark.unit


@pytest.mark.unit
class TestLogLevel:
    """日志级别枚举测试。"""

    def test_enum_values_are_correct(self):
        # Arrange
        # Act
        # Assert - 校验四个枚举成员的字符串值
        assert LogLevel.DEBUG == "debug"
        assert LogLevel.INFO == "info"
        assert LogLevel.WARN == "warn"
        assert LogLevel.ERROR == "error"

    def test_enum_inherits_from_str(self):
        # Arrange
        # Act
        # Assert - StrEnum 应继承 str 并支持字符串比较
        assert issubclass(LogLevel, str)
        assert isinstance(LogLevel.INFO, str)

    def test_enum_has_four_members(self):
        # Arrange
        # Act
        members = list(LogLevel)
        # Assert
        assert len(members) == 4