Shai Yallin
Acceptance-Testing NestJS Microservices
Acceptance Testing multiple NestJS Microservices by running them a single process communicating via a memory fake.
top of page
Search
Shai Yallin
- Sep 3
- 4 min
Using Contract Tests for reliable memory fakes
How to make sure that memory-based fakes really behave like the production implementations they replace
14 views0 comments
Shai Yallin
- Sep 3
- 6 min
Fast and Furious Acceptance Tests for NestJS applications
Writing memory-based black-box acceptance tests for NestJS apps, testing features rather than implementation details
28 views0 comments
Shai Yallin
- Apr 2
- 3 min
Unit Tests Considered Harmful
Unit tests couple us to implementation detail, restrict refactoring and don't assert that features work. Prefer bigger-scoped tests.
7,052 views5 comments
Shai Yallin
- Mar 18
- 3 min
Of Rigid Microservices and Flexible Monoliths
Microservices incur significant overheads in costs of change, runtime and complexity. Start with a monolith and break it down when needed.
606 views1 comment
Shai Yallin
- Jun 11, 2023
- 6 min
Case Study: Testing the Codium.AI VS Code Extension
How I wrote tests for a VS Code extension that relies on a React.js WebView as its UI, using Playwright, Mocha and some HTTP hacking
306 views0 comments
Shai Yallin
- May 2, 2023
- 6 min
Fake, Don't Mock
Fakes are complete implementations of an API used to replace IO-bound adapters with memory-bound doubles to facilitate Acceptance Testing
2,067 views0 comments
Shai Yallin
- Mar 19, 2023
- 3 min
Learning Tests: better than benzos
Learning Tests are an easy and useful methodology for integration with new and unknown APIs, reducing stress and improving feedback times.
77 views0 comments
Shai Yallin
- Mar 10, 2023
- 6 min
Flutter: a love story
How I learned Flutter to create an iOS app for usage during concerts with my band, using TDD and Acceptance Testing.
185 views0 comments
Shai Yallin
- Aug 28, 2022
- 6 min
Chronomatic: my side-project story
How I used React with TypeScript and Firebase to build my own client management system, using TDD and Acceptance Testing.
646 views1 comment
Shai Yallin
- Jul 19, 2022
- 4 min
Beautiful Object Builders in TypeScript
Fixture test data create stale and outdated data, and make tests unreliable. Object Builders are a better way, here's how to use them.
716 views0 comments
Shai Yallin
- Jan 5, 2022
- 9 min
Case Study: Versatile CraneView Refactoring
How I helped Versatile remove fear of change in a key subsystem by introducing TDD and refactoring to Hexagonal Architecture.
994 views0 comments
Shai Yallin
- Nov 23, 2021
- 6 min
Your Software as a Kitchen
When there are too many dirty pots and plates in the sink, it's impossible to clean them. It's the same with software and technical debt.
1,240 views0 comments
Shai Yallin
- Feb 1, 2021
- 6 min
Permanent Prototypes
Prototypes are a lie; when it's good enough for production, it *becomes* production. Here's how to make them easily maintainable.
1,685 views0 comments
Shai Yallin
- Nov 4, 2020
- 9 min
Big Design Up-Front or Emergent Design? Hexagonal Architecture Gives Us Both
Hexagonal Architecture allows us to separate pure logic from external constraints and enables writing fast, integrative acceptance tests.
955 views0 comments
bottom of page