使用 Moto 模拟 Lambda 响应 returns 'b"error running lambda: (2, 'WaitNamedPipe', 'The system cannot find the file specified.')"'

Question

我正在运行进行单元测试 (Pytest) to that invokes a mocked Lambda (with Moto) 并期待回复。假设我们正在导入 boto3 并创建了一个 lambda 客户端常量。这是函数：

def invoke_lambda():
    request = {'message': 'Hello World!'}
    lambda_response = LAMBDA_CLIENT.invoke(
        FunctionName='hello-world-lambda',
        InvocationType='RequestResponse',
        Payload=json.dumps(request)
    )

    response = lambda_response['Payload'].read()
    print(response)
    return response

这是我的单元测试：

import zipfile

import boto3
from moto import mock_lambda

CLIENT = boto3.client('lambda', region_name='us-east-1')

# Expected response setup and zip file for lambda mock creation
def lambda_event():
    code = '''
        def lambda_handler(event, context):
            return event
        '''
    zip_output = io.BytesIO()
    zip_file = zipfile.ZipFile(zip_output, 'w', zipfile.ZIP_DEFLATED)
    zip_file.writestr('lambda_function.py', code)
    zip_file.close()
    zip_output.seek(0)
    return zip_output.read()

# create mocked lambda with zip file
def mock_some_lambda(lambda_name, return_event):
    return CLIENT.create_function(
        FunctionName=lambda_name,
        Runtime='python2.7',
        Role='test-iam-role',
        Handler='lambda_function.lambda_handler',
        Code={
            'ZipFile': return_event,
        },
        Publish=True,
        Timeout=30,
        MemorySize=128
    )

# Test function
@mock_lambda
def test_invoke_lambda():
    mock_some_lambda('hello-world-lambda', lambda_event)
    response = function_code.invoke_lambda()
    assert response['message'] == 'Hello World!'

当运行连接 Pytest 时，我看到 Lambda 响应是：b"error running lambda: (2, 'WaitNamedPipe', 'The system cannot find the file specified.')"

关于如何解决这个问题有什么想法吗？我从 google 搜索中看到一些指向 docker 的问题，但根据我的理解，Moto 应该能够运行这些开箱即用的东西，而不需要运行这个一个 docker 容器。帮助会很棒:)

Answer 1

原来我只需要为 Windows 安装 Docker 并有 Docker 运行...我没有再看到这个问题所以我想一切都是美好的。 – SamN 刚刚编辑

Answer 2

使用 moto 模拟 AWS lambda 需要 docker。
如果 docker 不是运行，您将看到错误：

'error running docker: Error while fetching server API version: (2, 'CreateFile', 'The system cannot find the file specified.')'

来自文档 https://github.com/spulec/moto

使用 Moto 模拟 Lambda 响应 returns 'b"error running lambda: (2, 'WaitNamedPipe', 'The system cannot find the file specified.')"'

Using Moto to Mock Lambda Response returns 'b"error running lambda: (2, 'WaitNamedPipe', 'The system cannot find the file specified.')"'

python

pytest

boto3

aws-lambda

moto