saveourtool/diktat

New rule: Empty functions should be one-liner and return `Unit`

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#1,701 opened on Jun 29, 2023

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 (2 comments) (1 reaction) (1 assignee)Kotlin (40 forks)github user discovery
enhancementgood first issue

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Description

If for some reasons, function have no any logic, but exists only for some kind of execution: in cases of testing via JUnit Runners or JUnit Rules or some other purposes, it shouldn't have any body and should be fixed in the following way

@Test
@SomeAnnotation
fun foo() {
// no-op here
}

// no-op here
@Test
@SomeAnnotation
fun foo() = Unit

Contributor guide

Research direction
Review existing rule implementations in diktat for function related checks. Look at how rules check function bodies and annotations. Create a new rule that detects empty function bodies with the pattern shown and suggests replacing with '= Unit'.
Tech stack
kotlin
Domain
tooling
Issue type
Feature
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.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
KotlinGit
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
75