DevOps Articles

Unit Testing AWS Lambda with Python and Mock AWS Services

When building serverless event-driven applications using https://aws.amazon.com/lambda/, it is best practice to validate individual components. Unit testing can quickly identify and isolate issues in AWS Lambda function code. The techniques outlined in this blog demonstrates unit test techniques for Python-based AWS Lambda functions and interactions with AWS Services.

In production, our Lambda function code will directly access the AWS resources we defined in our function handler; however, in our unit tests we want to isolate our code and replace the AWS resources with simulations.

We’ve seen in this blog how to unit test AWS Lambda functions and mock AWS Services to isolate and test individual logic within our code.