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Overview

Imagination is more important than knowledge. For knowledge is limited to all we now know and understand, while imagination embraces the entire world, and all there ever will be to know and understand." - Albert Einstein.

News

Blog 4 months ago
Mocks are the Little-Death: Escaping the Mirage of Green Tests
"Mocks are the mind-killer. They are the little-death that brings total production failure. I will face my mocks. I will permit them to pass over me and through me. And when they have gone past, I will turn the inner eye to see their path. Where the mocks
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Blog 6 months ago
Beyond the README: Enforcing Application Guardrails at Runtime
You're testing a new feature in a development environment. You click "Submit," and a few seconds later, your phone buzzes with a real-world SMS notification. Or worse, a real customer receives a "Test" email meant for a sandbox user. While these aren't us
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Blog 7 months ago
Time-Travel Debugging: Replaying Production Bugs Locally
We've all had that sinking feeling. There are multiple crash reports from production. We have the exact input parameters that caused the failures. We have the stack traces. Yet, when we run the code locally, it works perfectly. We know where it broke, but
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Blog 9 months ago
Testing Side Effects Without the Side Effects
In Managing Side Effects , we built a tiny JavaScript Effect System that treats side effects like database calls as data descriptions rather than executable promises. In a typical imperative application, business logic and side effects are inextricably li
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Blog 10 months ago
Managing Side Effects: A JavaScript Effect System in 30 Lines or Less
If you look at the source code of a typical application, you will likely find business logic tangled with database calls, HTTP requests firing off in the middle of validation rules, and try/catch blocks sprinkled here and there. The biggest casualty of th
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