facebookexperimental/Recoil

Add unit tests for glitch-freeness

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#535 opened on Aug 26, 2020

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 (5 comments) (10 reactions) (0 assignees)JavaScript (19,428 stars) (1,151 forks)batch import
good first issuetests

Description

First of all thanks for sharing this amazing library!

I was wondering, is Recoil glitch-free?

Many other reactive frameworks - like RxJS - don't have a synchronous dataflow architecture, so updates happen in the order of subscription, and not per se in the correct dependency order (like FlapJAX, SodiumFRP, Reactive-Banana, etc).

I'm curious if Recoil solves this problem?

Contributor guide

Tech stack
javascriptreact
Domain
frontendtesting
Issue type
test
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
half day
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
needs maintainer response
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
unclear
Prerequisites
Recoil fundamentalsGlitch concept in reactive programmingUnit testing with Jest
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
20
Research direction
Investigate Recoil's existing test suite to understand testing patterns. Identify the core scheduler or dependency graph module where glitch freeness would be relevant. Design test cases that verify that when a dependency changes, all selectors update in the correct order without intermediate inconsistent states. Look for any existing discussions in the issue comments that might clarify the desired implementation.