(25 comments) (0 reactions) (0 assignees)Kotlin (6,518 stars) (463 forks)batch import

beginner friendlyhacktoberfesthelp wanted

Description

This ticket tracks classes that are lacking in test coverage. All of this code has been stable for a long time, but it's a good way to get familiar with the Arrow codebase.

If you're looking to contribute to Arrow, and want a small piece of work writing some tests is a good way to get started. If you're not sure if a function, or code branch, is missing coverage in a certain file you can run ./gradlew koverHtmlReport and open the resulting report.

Or feel free to pick any of the items listed below and add missing tests for the .kt file.

Arrow Core

currying.kt missing tests for almost all functions in progress by @lgtout
[Either.kt]](https://github.com/arrow-kt/arrow/blob/main/arrow-libs/core/arrow-core/src/commonMain/kotlin/arrow/core/Either.kt) only has 50% coverage in progress by @poseidon2060
[Ior.kt]](https://github.com/arrow-kt/arrow/blob/main/arrow-libs/core/arrow-core/src/commonMain/kotlin/arrow/core/Ior.kt) only has 70% coverage in progress by @gutiory
[Iterable.kt]](https://github.com/arrow-kt/arrow/blob/main/arrow-libs/core/arrow-core/src/commonMain/kotlin/arrow/core/Iterable.kt) only has 50% coverage.
[MapKt.kt]](https://github.com/arrow-kt/arrow/blob/main/arrow-libs/core/arrow-core/src/commonMain/kotlin/arrow/core/Iterable.kt) only has 16% coverage.
[NonEmptyList.kt]](https://github.com/arrow-kt/arrow/blob/main/arrow-libs/core/arrow-core/src/commonMain/kotlin/arrow/core/NonEmptyList.kt) only has 50% coverage. @l2hyunwoo
[Option.kt]](https://github.com/arrow-kt/arrow/blob/main/arrow-libs/core/arrow-core/src/commonMain/kotlin/arrow/core/NonEmptyList.kt) only has 75% coverage in progress by @swdevsm
[partials.kt]](https://github.com/arrow-kt/arrow/blob/main/arrow-libs/core/arrow-core/src/commonMain/kotlin/arrow/core/partials.kt) only has 2,4% coverage.
Missing tests for utilities TupleX.kt

Contributor guide

Tech stack: kotlin
Domain: testing
Issue type: test
Difficulty: 2
Estimated time: 1-3 hours
Activity status: stale
Clarity: clear
Prerequisites: Kotlin basicstesting experience
Newbie friendliness: 80
Research direction: Pick one of the listed files with missing tests (e.g., MapKt.kt, partials.kt, TupleX.kt). Run `./gradlew koverHtmlReport` to identify untested functions or branches. Write unit tests using Kotlin's testing framework (e.g., Kotest or JUnit) to cover the missing cases. Ensure tests are placed in the appropriate test directory following existing patterns.