Testing

Testing Step Functions: how to skip time when testing Timeout and Wait states

AWS, Programming, Serverless, Step Functions, Testing / September 6, 2023

When I previously wrote about testing Step Functions, I gave you a general strategy that consists of: Component tests that target the Lambda functions (specifically, the custom code you wrote in those functions). End-to-end tests that execute the state machine in the cloud. Local tests using Step Functions Local where you can use mocks to …

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No, you don’t need to test every line of your CDK application

AWS, CDK, Programming, Serverless, Testing / September 6, 2023

Several people have asked me about unit testing CDK applications recently. The questions often go something like this: “Because it can be in Python or TS, people bring up unit testing for CDK, whereas it’s not even thought about with Serverless Framework, SAM or Terraform. What are your thoughts on this?” “I have so many …

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A practical guide to testing AWS Step Functions

AWS, Serverless, Step Functions, Testing / September 6, 2023

Testing Step Functions can be a daunting task. However, with a little preparation and effort, the testing process can be simplified and streamlined. In this article, we will provide a practical strategy on how to test Step Functions. So let’s start by setting the stage and introducing the players. What makes Step Functions hard to test? …

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How to include SNS and Kinesis in your e2e tests

API Gateway, AWS, DynamoDB, Kinesis, Lambda, Programming, Serverless, SNS, Testing / September 6, 2023

Update 17/09/2019: based on feedback, I added a few more alternatives that do not require you to deploy additional Lambda functions to the e2e-test stage. Scroll to the end to find out more. Being event-driven is a key characteristic of a serverless architecture. Often our Lambda functions would publish events to SNS topics or Kinesis …

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.Net Tips – using InternalsVisibleTo attribute to help testing non-public methods

Leave a Comment / .Net, C#, Programming, Testing, Tips / August 18, 2023

Oh, the Pain! For a long time, unit testing non-public methods in C# has been a pain in the back side. In order to test a non-public method (most likely private methods) you have a number of choices each with an undesired effect: The easiest way out is to make the methods public. However, this …

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