Book Image

Mastering AWS Lambda

By : Yohan Wadia, Udita Gupta
Book Image

Mastering AWS Lambda

By: Yohan Wadia, Udita Gupta

Overview of this book

AWS is recognized as one of the biggest market leaders for cloud computing and why not? It has evolved a lot since the time it started out by providing just basic services such as EC2 and S3 and today; they go all the way from IoT to Machine Learning, Image recognition, Chatbot Frameworks, and much more! One of those recent services that is also gaining a lot of traction is AWS Lambda! Although seemingly simple and easy to use, Lambda is a highly effective and scalable compute service that provides developers with a powerful platform to design and develop Serverless event-driven systems and applications. The book begins with a high-level introduction into the world of Serverless computing and its advantages and use cases, followed by a deep dive into AWS Lambda! You’ll learn what services AWS Lambda provides to developers; how to design, write, and test Lambda functions; as well as monitor and troubleshoot them. The book is designed and accompanied with a vast variety of real-world examples, use cases, and code samples that will enable you to get started on your Serverless applications quickly. By the end of the book, you will have gained all the skills required to work with AWS Lambda services!
Table of Contents (11 chapters)

The need for testing Lambda function

If you are new to the world of testing or don't write test cases, then you may be thinking "Hey, I am here to write and develop Lambda functions, why do I even need to read this chapter, right?" Well, not so right. Testing is a very crucial part of any code development and should be enforced at all times. The reason is that, tests are an effective way of documenting your codebase and they can also act as a safeguarding mechanism which ensures that only code that is working as expected, and nothing else, is pushed into a production environment.

There are a variety of different tests that you can run on your code, however, for simplicity we can always refer the following test pyramid as a reference:

To know more about the test pyramid, check out this link https://martinfowler.com/bliki/TestPyramid.html.

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