Articles | Khalil Stemmler

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How to Mock without Providing an Implementation in TypeScript Test-Driven Development

typescript test-driven development mocking jest ts-auto-mock

Having to provide an implementation everytime you create a test double leads to brittle tests. In this post, we learn how to creat...

When to Use Mocks: Use Case Tests Test-Driven Development

use cases test-driven development outside-in tdd inside-out tdd mocking

Mocking gets a pretty bad rap. However, if you're building an application using object-oriented programming and you're making use ...

Why I Recommend a Feature-Driven Approach to Software Design Software Design

feature-driven development accidental complexity essential complexity

Features represent the essential complexity of software design. It's the complexity that can't be avoided. Everything else — the l...

Introduction to Test-Driven Development (TDD) with Classic TDD Example Test-Driven Development

tdd test-driven development software craftsmanship agile technical practice classic tdd

The best thing tests give us is "feedback". Feedback as to if our designs are good, if there are bugs, and if we're making progres...

GraphQL Schemas vs. RESTful DTOs GraphQL

graphql architecture software design restful apis dto

GraphQL schemas serve a similar purpose to RESTful DTOs. One of the main differences is tooling. In this post, I aim to strengthen...

Use DTOs to Enforce a Layer of Indirection | Node.js w/ TypeScript Enterprise Node + TypeScript

node.js typescript express.js enterprise software dto

DTOs help you create a more stable RESTful API; they protect your API clients from changes made on the server.

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