typelevel/cats-effect

Laws testing for queue functor instances

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#1,618 opened on Jan 22, 2021

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good first issue

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Description

We have {Functor, Invariant, Contravariant} instances for {Q, Deq, PQ}ueue in cats.effect.std but they currently have no laws tests. We should correct this :)

Contributor guide

Research direction
Examine the existing laws tests for other types in cats.effect.std and implement similar tests for the functor instances of Q, Deq, and PQ queues. Check which functor instances (Functor, Invariant, Contravariant) are defined and ensure all laws are covered.
Tech stack
scala
Domain
backend
Issue type
Test
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
Scalacats effecttesting laws
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
60