![]() Go to the circleci-serverless-unit-testing directory. Run: mkdir circleci-serverless-unit-testing Our tutorials are platform-agnostic, but use CircleCI as an example.Ĭreate a new directory for your project. Set up AWS to use OpenID Connect Tokens.Prerequisitesįor this tutorial, you will need to set up these items: It builds on the learnings from the Deploying a serverless application blog post. In this tutorial, you will learn how to build an automated unit testing pipeline using Jest testing framework for serverless applications. Using event-based architecture, you can mock the events to add test cases and assert the expected behaviour based on the event received. Unit testing lets you to test your application logic in isolation. They improve the overall design and quality of the application and allow you to refactor code with confidence.īecause your application could depend on a number of other AWS services, it is difficult to replicate the cloud environment locally. ![]() Unit test cases make it easier to detect bugs early during the development phase and guard against regression issues. Serverless applications are distributed by design, so good code coverage is vital, and should include unit testing. It frees you from worrying about how to package and deploy the application to the cloud, so you can focus on your application logic. The Serverless framework is an open-source framework written in Node.js that simplifies the development and deployment of AWS Lambda functions. Building a pipeline to run tests and deploy the app.Using the Jest framework to set up unit testing for a serverless application.
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