PayrollManagementSystem/backend/tests/integration/test_settings.py

"""系统设置（公司信息）接口测试。

守的是：
- 单行语义：全系统恒一行，PUT 只改名称不增行
- public 端点无鉴权可用但**白名单字段**——多一个敏感字段都是匿名泄漏
- logo 上传三重校验（后缀/magic bytes/大小）——仅看后缀可被伪造
- 审计留痕：系统设置属敏感配置，改必须有日志

真图片构造：PNG 用 8 字节签名 + 最小 IHDR；JPG 用 SOI 头 + 填充字节。
仅校验 magic bytes 前缀，无需完整合法图片（解析由前端 img 完成）。
"""

import uuid

import pytest
from fastapi.testclient import TestClient

from app.main import app

pytestmark = pytest.mark.integration

_SETTINGS = "/api/v1/system/settings"

_PNG_BYTES = b"\x89PNG\r\n\x1a\n" + b"\x00" * 32
_JPG_BYTES = b"\xff\xd8\xff\xe0" + b"\x00" * 32
_TXT_BYTES = b"not an image at all"


@pytest.fixture
def client() -> TestClient:
    return TestClient(app)


class TestCompanyInfo:
    """公司名称读取与更新。"""

    def test_初始值与更新生效(self, client: TestClient, admin: dict) -> None:
        got = client.get(_SETTINGS, headers=admin["headers"]).json()["data"]
        assert got["company_name"]
        # logo_url 允许为 None（未上传）或历史遗留的 URL——单行库可复用，
        # 断言不依赖「干净库」前提；上传行为由 TestLogoUpload 专类覆盖
        assert got["logo_url"] is None or "/logo/public" in got["logo_url"]

        new_name = f"测试公司_{uuid.uuid4().hex[:6]}"
        put = client.put(_SETTINGS, json={"company_name": new_name}, headers=admin["headers"])
        assert put.status_code == 200, put.text
        assert put.json()["data"]["company_name"] == new_name
        assert (
            client.get(_SETTINGS, headers=admin["headers"]).json()["data"]["company_name"]
            == new_name
        )

    def test_名称为空被拒(self, client: TestClient, admin: dict) -> None:
        assert (
            client.put(_SETTINGS, json={"company_name": ""}, headers=admin["headers"]).status_code
            == 400
        )

    def test_非管理员改名称被拒(self, client: TestClient, normal: dict) -> None:
        resp = client.put(_SETTINGS, json={"company_name": "越权公司"}, headers=normal["headers"])
        assert resp.status_code == 403

    def test_修改留审计日志(self, client: TestClient, admin: dict) -> None:
        client.put(
            _SETTINGS,
            json={"company_name": f"审计公司_{uuid.uuid4().hex[:6]}"},
            headers=admin["headers"],
        )
        logs = client.get(
            "/api/v1/system/operation-logs",
            params={"module": "系统设置"},
            headers=admin["headers"],
        ).json()["data"]["list"]
        assert logs, "修改公司名称未产生操作日志"


class TestPublicEndpoint:
    """匿名端点：白名单字段 + 可用性。"""

    def test_无令牌可读且仅白名单字段(self, client: TestClient, admin: dict) -> None:
        name = f"公开公司_{uuid.uuid4().hex[:6]}"
        client.put(_SETTINGS, json={"company_name": name}, headers=admin["headers"])

        resp = client.get(f"{_SETTINGS}/public")
        assert resp.status_code == 200
        data = resp.json()["data"]
        assert set(data) == {"company_name", "logo_url"}, "public 端点字段越界"
        assert data["company_name"] == name
        assert resp.headers.get("cache-control") is not None

    def test_写操作匿名不可用(self, client: TestClient) -> None:
        assert client.put(f"{_SETTINGS}/public", json={"company_name": "x"}).status_code in {
            401,
            405,
        }


class TestLogoUpload:
    """logo 上传校验链。"""

    def _upload(self, client: TestClient, admin: dict, filename: str, content: bytes):
        return client.post(
            f"{_SETTINGS}/logo",
            files={"file": (filename, content, "application/octet-stream")},
            headers=admin["headers"],
        )

    def test_合法png上传成功且回读(self, client: TestClient, admin: dict) -> None:
        resp = self._upload(client, admin, "logo.png", _PNG_BYTES)
        assert resp.status_code == 200, resp.text
        out = resp.json()["data"]
        assert out["logo_url"] and "/logo/public" in out["logo_url"]

        img = client.get(f"{_SETTINGS}/logo/public")
        assert img.status_code == 200
        assert img.headers["content-type"] == "image/png"

    def test_伪造扩展名被magic_bytes拦截(self, client: TestClient, admin: dict) -> None:
        resp = self._upload(client, admin, "fake.png", _TXT_BYTES)
        assert resp.status_code == 400
        assert "不符" in resp.json()["message"]

    def test_非法格式被拒(self, client: TestClient, admin: dict) -> None:
        assert self._upload(client, admin, "x.gif", _PNG_BYTES).status_code == 400

    def test_超限被拒(self, client: TestClient, admin: dict) -> None:
        big = _PNG_BYTES + b"\x00" * (2 * 1024 * 1024)
        resp = self._upload(client, admin, "big.png", big)
        assert resp.status_code == 400
        assert "2MB" in resp.json()["message"]

    def test_匿名上传被拒(self, client: TestClient) -> None:
        resp = client.post(
            f"{_SETTINGS}/logo",
            files={"file": ("logo.png", _PNG_BYTES, "application/octet-stream")},
        )
        assert resp.status_code == 401