Python 如何为flask应用程序设置测试mongo数据库

我有一个工作烧瓶应用程序，其外观如下：

import chai
from myFolder import app

class App(chai.Chai):
    @classmethod
    def setUpClass(cls):
        # this method is called before all testcases
        os.environ['MONGO_DB'] = 'test_db' # changing the db to test one

    @classmethod
    def tearDownClass(cls):
        # this method is called after all testcases
        os.environ['MONGO_DB'] = 'normal' # change db to normal

    def test_firstTestCase(self):
        client = app.app.test_client()
        print client.get('/api/something').data  # here is the Problem

我的myFolder/app.py带有：

app = flask.Flask('name')

# and then a lot of routes
@app.route('/api/something', methods=['GET'])
def someName():
   return flask.jsonify(somefile.somefunc())

包含函数的文件如下所示：

# initialize database connection
client = pymongo.MongoClient(host=os.environ['MONGO_IP'])
db = client[os.environ['MONGO_DB']]

# and then a lot of functions that uses this global db to CRUD something
def somefunc():
   # do something with db
   return

它工作得很好，每个人都很开心。但是我想和柴一起写一些测试

---

我想建立一个测试数据库，用数据填充它，进行一个API调用，断言数据看起来正常

我是这样做的：

import chai
from myFolder import app

class App(chai.Chai):
    @classmethod
    def setUpClass(cls):
        # this method is called before all testcases
        os.environ['MONGO_DB'] = 'test_db' # changing the db to test one

    @classmethod
    def tearDownClass(cls):
        # this method is called after all testcases
        os.environ['MONGO_DB'] = 'normal' # change db to normal

    def test_firstTestCase(self):
        client = app.app.test_client()
        print client.get('/api/something').data  # here is the Problem

---

让我惊讶的是，最后一次打印实际上是从真实数据库输出结果（我希望它什么也不输出，因为我将数据库名称更改为testing，并且没有填充它）。那么，我应该如何正确设置测试数据库呢？

您确定在模拟环境变量后会执行初始化数据库连接代码吗？根据我看到的输出，它不会执行。那么，您在哪里为带有函数的文件设置了

import

s？