Organizing Serverless Code with AWS SAM: Lambda Layers and Testing with Jest

Mon, 01 Jan 0001 00:00:00 +0000

This example demonstrates how to build clean, testable, and modular serverless applications on AWS using AWS SAM, Lambda Layers, and Jest. It focuses on two essential practices for scalable serverless development:

Using Lambda Layers to share code across functions
Using Jest to properly test each function and its dependencies

By combining these two patterns, you get a powerful structure that’s maintainable, reusable, and confidently testable.

Project Overview: Shared Logic + Layer for Node Modules + Testing

functions/ – Your Lambda function handlers:

Jest on {O}

Organizing Serverless Code with AWS SAM: Lambda Layers and Testing with Jest

Project Overview: Shared Logic + Layer for Node Modules + Testing