📰 Dev.to · Kevin Julián Martínez Escobar
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⚡ AI Lessons
Dev.to · Kevin Julián Martínez Escobar
1w ago
Playwright vs TWD: A Frontend Developer's Honest Comparison
I had both Playwright and TWD pointed at the same small app for a working day. Same backend, same UI,...
Dev.to · Kevin Julián Martínez Escobar
1w ago
Frontend with AI: workflow first, agent second
If you're about to plug AI into your team's frontend, define the process before you let it loose....
Dev.to · Kevin Julián Martínez Escobar
2w ago
The easiest way to test React Router v7 apps
You wrote a React Router v7 route. It has a loader, an action, a form, some interactivity. Now you...
Dev.to · Kevin Julián Martínez Escobar
2w ago
Testing TanStack Router + Query apps in the real browser
The first time you try to test a TanStack app the way the React Testing Library docs suggest, the...
Dev.to · Kevin Julián Martínez Escobar
3w ago
TWD setup is now two Vite plugins and zero app code
Setting up TWD used to mean adding a block of dev-only code to your app's entry file — a dynamic...
Dev.to · Kevin Julián Martínez Escobar
3w ago
Two test runtimes, two coverage reports, one fragile merge
You have unit tests in Vitest (or Jest). You have E2E tests in Playwright. CI runs both. Coverage...
Dev.to · Kevin Julián Martínez Escobar
1mo ago
Testing Payment Flows Without the Payment SDK
Payment integrations are one of the hardest things to test in a web app. The SDK renders its own UI,...
Dev.to · Kevin Julián Martínez Escobar
1mo ago
When Your Mocks Lie: Contract Testing with TWD
Every mock you write is a claim about what your backend returns. The moment the backend changes — a...
Dev.to · Kevin Julián Martínez Escobar
1mo ago
Turning Your Test Suite Into a Visual Map Your Whole Team Can Read
You have written the tests. The CI pipeline runs them. The gap analysis has helped you fill the blind...
Dev.to · Kevin Julián Martínez Escobar
1mo ago
Your Tests Pass. But Are They Good? Grading Test Quality with /twd:test-quality
The Problem With "We Have Tests" There is a moment in every project where someone says "we...
Dev.to · Kevin Julián Martínez Escobar
1mo ago
Your Tests Are Running — But Are They Covering the Right Things?
You've wired up your test suite. CI is green. You're shipping. And then a bug lands in production on...
Dev.to · Kevin Julián Martínez Escobar
1mo ago
From Local Tests to CI in One Command
Why Set Up CI Early Once you have tests worth running, the natural next step is making...
Dev.to · Kevin Julián Martínez Escobar
1mo ago
Your AI Doesn't Just Write Tests. It Runs Them Too.
In the previous article, we talked about /twd:setup — the skill that analyzes your project and...
Dev.to · Kevin Julián Martínez Escobar
2mo ago
Stop Letting AI Write Untestable Code. Add Determinism Back with TWD
Now that AI is generating a big portion of our frontend code, speed is no longer the main...
Dev.to · Kevin Julián Martínez Escobar
2mo ago
Are Developers Still Learning, or Just Using AI?
AI is changing the way we work as developers. We are moving from writing code to writing...
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