模拟boto3客户端调用

Question

我无法测试以下代码。如果删除client_mock，则测试将成功运行，显示已调用boto3.client（）。但是我无法测试返回的模拟客户端进行的任何调用。我收到AssertionError：预期已调用'get_paginator'。

我知道moto和安慰剂，但是出于本练习的目的，我试图学习如何使用unittest.mock进行此操作。

accounts.py

import boto3 

def get_accounts():
    '''
    Return a list of account information from the organization.
    '''
    client = boto3.client('organizations')
    paginator = client.get_paginator('list_accounts')
    response_iterator = paginator.paginate()    

    accounts = []
    for page in response_iterator:
        for account in page['Accounts']:
            accounts.append(account)

    return accounts

tests.py

import unittest
from accounts import get_accounts, get_session
from unittest.mock import patch    

class TestAccounts(unittest.TestCase):
    @patch('accounts.boto3')
    @patch('accounts.boto3.client')
    def test_get_accounts(self, client_mock, boto3_mock):
        get_accounts()
        boto3_mock.client.assert_called()
        client_mock.get_paginator.assert_called()    


if __name__ == '__main__':
    unittest.main()