Hello there!
My name is Nikolas Knickrehm and I am a Full Stack Developer and IT Consultant. This is a place where I write about work related stuff, technology and my favorite books.
Mocking Single Exported Functions with TypeScript and Jest
Mocking functions is really easy to do in Jest but what if the module is exporting a functions directly instead of bundling them in a class? Well, it is actually quite easy to do if you know this simple trick.
Transferring Large Files in TypeScript using Streams
We recently tried to optimize a Lambda function that is transferring files between two systems through REST-APIs. It was downloading a file from one system, splitting it up into chunks of a few MB before uploading the chunks to the destination system.
Why Live Share is Not Ideal for Pair Programming
For over one year my current team was using the Live Share plugin for VS Code and more recently also Code With Me for IntelliJ on a daily basis due to our remote setup. While initially I really loved this highly collaborative way of remote pair programming I now see a lot of issues with it.
Using Mocks in Unit Tests for Lambda Handlers with Jest
Today I had a little confrontation with Jest while writing unit tests for a Lambda function in TypeScript. The function is using the AWS SDK to send messages to an SQS queue. While this mocking problem seems very specific at first, mocking other dependencies would yield similar results.