The Test-First Technique

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prerequisites
basic TypeScript • basic Jest
skills learned
write granular tests for individual requirements • use larger-grain tests to drive the integration of individual components • change the design of existing code with the support of tests
Daniel Coleman and Max Guernsey, III
1 week · 4-6 hours per week · INTERMEDIATE
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Look inside

As a TypeScript developer, you’ve recently created a high-quality test suite as part of your company’s goal of adding functionality to its system. Now, using test-driven development (TDD) techniques, it’s time to analyze new requirements, reconcile them with what is currently documented by your test suite, and use the test-first technique to ensure changes to your library are justified, specified, and protected by tests.

This project is designed for learning purposes and is not a complete, production-ready application or solution.

project authors

Daniel Coleman

Daniel Coleman has been writing software since he was twelve years old, and has been getting paid for it for the last ten years. He quickly progressed from individual contributor to trailblazer for software design excellence, turning his teammates into fellow disciples of high quality. Dan has also worked as an embedded coach for teams, helping them perfect their craft through best practices for code design, test-driven development, behavior-driven development, and effective requirements management. He shares his thoughts on the industry and software design at agiledesign.io.

Max Guernsey, III

Max Guernsey has over twenty years of experience in software development and is currently a managing member at DevCraft LLC. He has worked on a wide range of products and technologies, including C++ class libraries, financial analysis applications, C# and Java backends, and even multi-platform video games. He is an experienced consultant and his "coaching from the keyboard" approach provides hands-on experience to learners in all aspects of modern software development.

prerequisites

This liveProject is for TypeScript developers who want to improve their testing skills. To begin these liveProjects you’ll need to be familiar with the following:

TOOLS
  • Basic TypeScript
  • Basic Jest
  • Basic Jest Mock Extended
TECHNIQUES
  • Object-oriented programming

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