Property testing for JavaScript

Quick and dirty CSS property testing

Oxlint rules enforcing the property-testing contract: it.prop / it.effect.prop predicates return a boolean on every path, never assert/expect, and never run through raw fc.assert.

Property testing for JavaScript

TEA-faithful state machine substrate — one package, every host adapter. Core + subs + testing, plus React, Durable Object, Chrome extension, Node, in-memory, work-queue, devtools, and property-testing modules as subpaths.

Complete oxlint preset for Effect and cell architecture: bundles all custom rule plugins (workflow, schema, entrypoint, property testing, test placement, hygiene) with type-aware correctness settings in a single config.

Property testing for JavaScript

MeTTa-native property testing, shrinking, state-machine testing, and bounded verification for MeTTaScript.

Property testing for JavaScript

One-shot oxlint plugin bundle: registers the surviving architecture rules in the DMMF family (property testing, test hygiene, test placement, effect-schema, effect-workflow) under a single entrypoint, excluding the core junk drawer.

Property testing for JavaScript

Property testing for JavaScript

Dead simple chaos/property testing

Property testing for Tap using fast-check

CSS vendor prefix detection and property feature testing.

TypeScript fuzz/property testing utilities with test runner integrations

Detect whether a terminal supports color

Does the environment have full property descriptor support? Handles IE 8's broken defineProperty/gOPD.

Property based testing for Vitest based on fast-check

`Object.defineProperty`, but not IE 8's broken one.