Connect Two Services

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prerequisites
basic TypeScript • basic Jest
skills learned
reproduce “ghost in the machine”-type problems with integration tests • create in-memory Nest.js applications
Daniel Coleman and Max Guernsey, III
1 week · 2-4 hours per week · INTERMEDIATE
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Look inside

You’re a TypeScript developer for a large company that sells stock photography. You’re responsible for the service that ingests images, and this service depends on another subservice: the pricing microservice. As proven by their individual unit tests, each service works as specified. But when the services are combined, new customers are locked into one pricing table—even those that should have access to pricing that fluctuates depending on factors like promotions, flash sales, and price-tuning. Working in IntelliJ WebStorm, you’ll solve this problem by writing an integration test that connects and runs the two services together, letting you reproduce the problem locally.

This project is a part of the series TypeScript Integration Testing with Nest Framework.
This project is designed for learning purposes and is not a complete, production-ready application or solution.

prerequisites

This liveProject is for developers with an intermediate-level understanding of TypeScript and object-oriented design. To begin these liveProjects you’ll need to be familiar with the following:

TOOLS
  • Basic Jest
  • Basic Nest.js
  • Working knowledge of TypeScript 4.x
  • Working knowledge of object-oriented programming

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