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aws-lambda-runtime-interface-emulator | Moto | |
---|---|---|
4 | 32 | |
871 | 7,374 | |
1.7% | 1.2% | |
5.2 | 9.9 | |
6 days ago | 7 days ago | |
Go | Python | |
Apache License 2.0 | Apache License 2.0 |
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aws-lambda-runtime-interface-emulator
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Understanding the AWS Lambda Runtime API
Enter the aws-lambda-runtime-interface-emulator. This tool will allow us to emulate the AWS Lambda Runtime API locally (I suspect that the AWS SAM uses this tool under the hood as well). The aws-lambda-runtime-interface-emulator is designed to be used with Docker. Still, nothing stops us from containerizing our code for the sake of development and then, whenever we are ready, proceeding with deployment how we wish to. This local workflow is a bit more involved than the previous one, but it might be a valid alternative for those not using AWS SAM or are already using containers to deploy their Lambdas.
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Puppeteer performance in AWS Lambda Docker containers
There is a special tool to test AWS Lambda images locally. It's called AWS Lambda Runtime Interface Emulator (RIE). You have two options: include RIE in your image or install it locally. We don't need it in the production image, so let's choose the second option. We will download binary locally and mount it to our image if we need to test it.
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Ask HN: Does anyone else find the AWS Lambda developer experience poor?
Suggestions:
1. If you are building APIs and using Lambda functions as targets from an API Gateway API, look into libraries like serverless-wsgi (Python) or wai-handler-hal (Haskell) that translate between API Gateway request/response payloads and some kind of ecosystem-native representation. Then as long as you're writing code where all state gets persisted outside of the request/response cycle, you can develop locally as if you were writing for a more normal deploy environment.
2. Look into the lambda runtime interface emulator ( https://github.com/aws/aws-lambda-runtime-interface-emulator... ). This lets you send invoke requests to a fake listener and locally test the lambda more easily. While the emulator is provided in the AWS container base images, you don't need to run it inside a container if you're deploying with zip files. (AWS-provided container images automatically enable the emulator if not running in a lambda runtime environment, and using docker for port remapping is nice. But not at all required.)
3. Get really good at capturing all requests to external services, and mocking them out for local testing. Whether this is with free monads, effect systems, gateway classes will depend on your language and library choices.
Moto
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OpenTF Announces Fork of Terraform
> OpenMoto
I dunno if you're trying to play on "hashimoto" but https://github.com/getmoto/moto#readme would be a prime name collision for any such "OpenMoto" name
But yes, please, to adopting Vault. I don't have a horse in the race about Consul but my suspicion is such an effort would only be worthwhile if trying to adopt Nomad, too, which I gravely doubt
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Class Credentials does not exist
Unfortunately I do not believe AWS provides any "test" gateways. I do know there are mock AWS servers you can run on your own. The one I use is called Moto. It does not cover everything (unfortunately it's the most comprehensive out there AFAIK), but it's decent enough to test most standard calls via the sdk. I'm not sure if it covers authorization though...we tend to use security roles on tasks for authorization.
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What is the development enviroment for AWS?
If using Python use Moto to mock AWS Services
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Unit testing Athena ETL?
You can use a library such as moto https://github.com/getmoto/moto
- Looking for resources for building unit testing for boto3 code and mocking AWS services in pytest
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Guide to AWS Serverless & Lambda Testing Best Practices — Part 1
The Pythonic motto library mocks AWS services, removing the need to deploy your application or pay for API calls against AWS services. Other programming languages have their motto implementation.
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Mock AWS Services on Docker
Has anyone managed to configure moto (https://docs.getmoto.org/en/latest/) in a docker container in the similar way LocalStack does?
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Unit Testing an Airflow Dag
As for mocking, you can take a look at the moto library for mocking the AWS SDK, or for more simple cases even just use a `unittest.Mock/MagicMock` object. If you're having trouble trying to use the mocks in your code, it's a good sign your code is too highly coupled and it'd pay to re-factor, for example using dependency injection, design patterns like adapter/facade etc. (but don't over-do it)
- Final FLiP Stack Weekly of 2022
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Do unit tests make sense here?
To add on to the integration tests point, for mocking out your AWS resources you should check out moto if you don't want run your test against real AWS resources as they may cost you and is usually slower.
What are some alternatives?
serverless-application-model - The AWS Serverless Application Model (AWS SAM) transform is a AWS CloudFormation macro that transforms SAM templates into CloudFormation templates.
LocalStack - 💻 A fully functional local AWS cloud stack. Develop and test your cloud & Serverless apps offline
serverless-offline - Emulate AWS λ and API Gateway locally when developing your Serverless project
aws-sdk-go - AWS SDK for the Go programming language.
aws-lambda-go - Libraries, samples and tools to help Go developers develop AWS Lambda functions.
aws-cdk-local - Thin wrapper script for using the AWS CDK CLI with LocalStack
docker-lambda - Docker images and test runners that replicate the live AWS Lambda environment
VCR.py - Automatically mock your HTTP interactions to simplify and speed up testing
aws-lambda-python-runtime-interface-client
responses - A utility for mocking out the Python Requests library.
chrome-aws-lambda - Chromium Binary for AWS Lambda and Google Cloud Functions
freezegun - Let your Python tests travel through time