"""
命名转换工具单元测试
=============================================================

- convert_camel_case / convert_snake_case：单字符串转换
- convert_camel_to_snake / convert_snake_to_camel：字典键递归转换
"""

from src.common.utils.case_converter import (
    convert_camel_case,
    convert_snake_case,
    convert_camel_to_snake,
    convert_snake_to_camel,
)


class TestSingleString:
    def test_snake_to_camel(self):
        assert convert_camel_case("user_id") == "userId"

    def test_camel_to_snake(self):
        assert convert_snake_case("userId") == "user_id"


class TestDictKeys:
    def test_camel_to_snake_dict(self):
        data = {"userId": 1, "userInfo": {"realName": "张三"}}
        assert convert_camel_to_snake(data) == {"user_id": 1, "user_info": {"real_name": "张三"}}

    def test_snake_to_camel_dict(self):
        data = {"user_id": 1, "user_info": {"real_name": "张三"}}
        assert convert_snake_to_camel(data) == {"userId": 1, "userInfo": {"realName": "张三"}}

    def test_roundtrip(self):
        source = {"user_id": 1, "role_ids": [1, 2]}
        camel = convert_snake_to_camel(source)
        assert camel == {"userId": 1, "roleIds": [1, 2]}
        assert convert_camel_to_snake(camel) == source