Book Image

Implementing AWS: Design, Build, and Manage your Infrastructure

By : Yohan Wadia, Rowan Udell, Lucas Chan, Udita Gupta
Book Image

Implementing AWS: Design, Build, and Manage your Infrastructure

By: Yohan Wadia, Rowan Udell, Lucas Chan, Udita Gupta

Overview of this book

With this Learning Path, you’ll explore techniques to easily manage applications on the AWS cloud. You’ll begin with an introduction to serverless computing, its advantages, and the fundamentals of AWS. The following chapters will guide you on how to manage multiple accounts by setting up consolidated billing, enhancing your application delivery skills, with the latest AWS services such as CodeCommit, CodeDeploy, and CodePipeline to provide continuous delivery and deployment, while also securing and monitoring your environment's workflow. It’ll also add to your understanding of the services AWS Lambda provides to developers. To refine your skills further, it demonstrates how to design, write, test, monitor, and troubleshoot Lambda functions. By the end of this Learning Path, you’ll be able to create a highly secure, fault-tolerant, and scalable environment for your applications. This Learning Path includes content from the following Packt products: • AWS Administration: The Definitive Guide, Second Edition by Yohan Wadia • AWS Administration Cookbook by Rowan Udell, Lucas Chan • Mastering AWS Lambda by Yohan Wadia, Udita Gupta
Table of Contents (29 chapters)
Title Page
Copyright and Credits
About Packt
Contributors
Preface
Index

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:

Note

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

The following image depicts the three basic steps that you as a developer have to keep in mind when developing Lambda functions:

  • Unit Tests: A unit test...