dwyl/learn-aws-lambda

How to Unit Test Lambda Functions in Local/CI Environment?

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#16 opened on Jan 26, 2016

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Description

How are we going to Unit Test the Lambda handler to ensure it works as expected? https://aws.amazon.com/blogs/compute/serverless-testing-with-aws-lambda/ ? https://medium.com/@AdamRNeary/developing-and-testing-amazon-lambda-functions-e590fac85df4

Contributor guide

Tech stack
nodejsaws
Domain
testingcloudbackend
Issue type
research
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
stale
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
unclear
Prerequisites
AWS Lambda basicsunit testing concepts
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
30
Research direction
Investigate the blog posts linked in the issue to understand common approaches for unit testing AWS Lambda handlers locally and in CI. Explore patterns like mocking AWS SDK calls and using local testing frameworks. Consider documenting a recommended setup with Node.js and Jest, and discuss trade offs between unit and integration tests for Lambda.