"""测试辅助函数"""

import pytest
from njupt_mcp.utils.helpers import format_json, parse_semester, validate_student_id


def test_format_json():
    """测试 JSON 格式化"""
    data = {"name": "测试", "value": 123}
    result = format_json(data)
    assert '"name": "测试"' in result
    assert '"value": 123' in result


def test_parse_semester_valid():
    """测试学期解析 - 有效格式"""
    result = parse_semester("2024-2025-1")
    assert result == ("2024", "2025", 1)
    
    result = parse_semester("2023-2024-2")
    assert result == ("2023", "2024", 2)


def test_parse_semester_invalid():
    """测试学期解析 - 无效格式"""
    assert parse_semester("2024-2025") is None
    assert parse_semester("invalid") is None
    assert parse_semester("") is None


def test_validate_student_id_valid():
    """测试学号验证 - 有效格式"""
    assert validate_student_id("B21010101") is True
    assert validate_student_id("M21010101") is True


def test_validate_student_id_invalid():
    """测试学号验证 - 无效格式"""
    assert validate_student_id("12345678") is False
    assert validate_student_id("B210101") is False
    assert validate_student_id("") is False