Kotlin Assertions

Open-source Kotlin projects categorized as Assertions
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Top 7 Kotlin Assertion Projects

Assertions

  1. Kotest

    Powerful, elegant and flexible test framework for Kotlin with assertions, property testing and data driven tests.

    Project mention: Ultimate Kotlin Cheatsheet | dev.to | 2025-03-29

    Kotest - Testing framework

  2. Stream

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  3. atrium

    A multiplatform expectation library for Kotlin

  4. strikt

    An assertion library for Kotlin

  5. hamkrest

    Hamcrest for Kotlin

  6. expekt

    BDD assertion library for Kotlin

  7. kiwi

    Fluent assertions for Kotlin (by from-source)

  8. xemantic-kotlin-test

    The power-assert compatible assertions DSL and some other testing goodies - a Kotlin multiplatform testing library.

    Project mention: Show HN: Power-assert for hierarchical data structures | news.ycombinator.com | 2024-12-10

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NOTE: The open source projects on this list are ordered by number of github stars. The number of mentions indicates repo mentiontions in the last 12 Months or since we started tracking (Dec 2020).

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Kotlin Assertions related posts

  • Why do Kotlin tests (for Gradle projects) have to be inside classes?

    1 project | /r/Kotlin | 28 Jan 2023

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  • How to improve third-party libraries with Kotlin extensions

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  • Which assertion library do you use?

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Index

What are some of the best open-source Assertion projects in Kotlin? This list will help you:

# Project Stars
1 Kotest 4,609
2 atrium 610
3 strikt 600
4 hamkrest 344
5 expekt 171
6 kiwi 17
7 xemantic-kotlin-test 8

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