"""测试 unstructured XLS Reader 的解析功能。"""

import pytest
import os
from readers.xls import unstructured


class TestUnstructuredXlsReaderParse:
    """测试 unstructured XLS Reader 的 parse 方法。"""

    def test_module_importable(self):
        """测试模块可以正确导入。"""
        assert unstructured is not None
        assert hasattr(unstructured, 'parse')
        assert callable(unstructured.parse)

    def test_file_not_exists(self, tmp_path):
        """测试文件不存在的情况。"""
        non_existent_file = str(tmp_path / "non_existent.xls")

        content, error = unstructured.parse(non_existent_file)

        # 验证返回 None 和错误信息
        assert content is None
        assert error is not None

    def test_parse_simple_xls(self, simple_xls_path):
        """测试解析简单 XLS 文件。"""
        content, error = unstructured.parse(simple_xls_path)

        # unstructured 可能需要额外依赖，只要不崩溃即可
        if content is not None:
            assert len(content.strip()) > 0