unittest, 抽取 conftest.py， 集成 unittest 基础配置

[itaa]

unittest, 抽取 conftest.py， 集成 unittest 基础配置
目前自动生成的 conftest.py 内容如下，该部分需提取到 summer 内，用户使用的时候直接 import 即可

import os
import pytest
import tempfile
from application.router import app as testapp
from application import db, engine, Base


@pytest.fixture
def app():
    db_fd, db_path = tempfile.mkstemp()
    yield testapp, db_path
    os.close(db_fd)
    os.unlink(db_path)


@pytest.yield_fixture()
def db():
    Base.metadata.create_all(engine)
    yield db
    Base.metadata.drop_all(engine)


@pytest.yield_fixture
def client(app):
    with app[0].test_client() as cli:
        yield cli