aws-lambda-runtime-interface-emulator

FWIW, Lambda takes the opposite of your assertion: there are function entrypoints and the HTTP or gRPC or Stdin is an implementation detail; one can see that in practice via the golang lambda "bootstrap" shim <https://pkg.go.dev/github.com/aws/aws-lambda-go@v1.49.0/lamb...> which is invoked by the Runtime Interface Emulator <https://github.com/aws/aws-lambda-runtime-interface-emulator...> I don't have the links to Azure's or GCP's function emulation framework, but my recollection is that they behave similarly, for similar reasons

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-

The best solution I've found for local testing is the Lambda Runtime Interface Emulator (RIE)[1]. It's basically a little Go wrapper[2] that runs your handler and makes it callable through an HTTP API. I considered writing a test harness around this for convenient integration testing but in my recent evaluation, I ended up avoiding Lambda (it's been really nice for small one-off tasks but was too expensive for the most recent and somewhat fringe use-case I considered using it for). [1]: https://docs.aws.amazon.com/lambda/latest/dg/images-test.htm... [2]: https://github.com/aws/aws-lambda-runtime-interface-emulator