如何使用带有moto的boto3测试方法

Question

我正在编写测试用例,以便使用boto3从s3中查找/获取密钥.我过去使用过moto来测试boto(而不是3)代码,但是我正试图用这个项目转到boto3,并遇到了一个问题:

class TestS3Actor(unittest.TestCase):
    @mock_s3
    def setUp(self):
        self.bucket_name = 'test_bucket_01'
        self.key_name = 'stats_com/fake_fake/test.json'
        self.key_contents = 'This is test data.'
        s3 = boto3.session.Session().resource('s3')
        s3.create_bucket(Bucket=self.bucket_name)
        s3.Object(self.bucket_name, self.key_name).put(Body=self.key_contents)

错误:

...
File "/Library/Python/2.7/site-packages/botocore/vendored/requests/packages/urllib3/connectionpool.py", line 344, in _make_request
self._raise_timeout(err=e, url=url, timeout_value=conn.timeout)
File "/Library/Python/2.7/site-packages/botocore/vendored/requests/packages/urllib3/connectionpool.py", line 314, in _raise_timeout
if 'timed out' in str(err) or 'did not complete (read)' in str(err):  # Python 2.6
TypeError: __str__ returned non-string (type WantWriteError)
botocore.hooks: DEBUG: Event needs-retry.s3.CreateBucket: calling handler <botocore.retryhandler.RetryHandler object at 0x10ce75310>

看起来moto没有正确地模仿boto3调用 - 我该如何工作呢？

Answer 1

对我来说有用的是boto在运行我的模拟测试之前设置环境boto3.

这是一个工作片段:

import unittest
import boto
from boto.s3.key import Key
from moto import mock_s3
import boto3


class TestS3Actor(unittest.TestCase):
    mock_s3 = mock_s3()

    def setUp(self):
        self.mock_s3.start()
        self.location = "eu-west-1"
        self.bucket_name = 'test_bucket_01'
        self.key_name = 'stats_com/fake_fake/test.json'
        self.key_contents = 'This is test data.'
        s3 = boto.connect_s3()
        bucket = s3.create_bucket(self.bucket_name, location=self.location)
        k = Key(bucket)
        k.key = self.key_name
        k.set_contents_from_string(self.key_contents)

    def tearDown(self):
        self.mock_s3.stop()

    def test_s3_boto3(self):
        s3 = boto3.resource('s3', region_name=self.location)
        bucket = s3.Bucket(self.bucket_name)
        assert bucket.name == self.bucket_name
        # retrieve already setup keys
        keys = list(bucket.objects.filter(Prefix=self.key_name))
        assert len(keys) == 1
        assert keys[0].key == self.key_name
        # update key
        s3.Object(self.bucket_name, self.key_name).put(Body='new')
        key = s3.Object(self.bucket_name, self.key_name).get()
        assert 'new' == key['Body'].read()

与py.test test.py您一起运行时,您将获得以下输出:

collected 1 items 

test.py .

========================================================================================= 1 passed in 2.22 seconds =========================================================================================