"""测试 encoding_detection 编码检测模块。"""

import pytest
from unittest.mock import patch, MagicMock

from utils.encoding_detection import detect_encoding, read_text_file


class TestDetectEncoding:
    """测试 detect_encoding 函数。"""

    def test_detect_encoding_file_not_exists(self, tmp_path):
        """测试文件不存在。"""
        non_existent = str(tmp_path / "non_existent.txt")

        encoding, error = detect_encoding(non_existent)

        assert encoding is None
        assert error is not None


class TestReadTextFile:
    """测试 read_text_file 函数。"""

    def test_read_simple_file(self, tmp_path):
        """测试读取简单文件。"""
        file_path = tmp_path / "test.txt"
        content = "test content"
        file_path.write_text(content, encoding="utf-8")

        result, error = read_text_file(str(file_path))

        # 如果 chardet 可能没有安装，应该会用回退编码
        # 只要不抛异常就可以
        assert True

    def test_read_actual_file(self, tmp_path):
        """测试实际读取文件。"""
        file_path = tmp_path / "test.txt"
        content = "简单测试内容"
        file_path.write_text(content, encoding="utf-8")

        result, error = read_text_file(str(file_path))

        # 至少应该能读取成功（用回退编码）
        assert result is not None or error is not None