A very common reason is a wrong site baseUrl configuration.\n

Current configured baseUrl = / (default value)\n

We suggest trying baseUrl = \n\n',document.body.prepend(n);var e=document.getElementById("__docusaurus-base-url-issue-banner-suggestion-container"),s=window.location.pathname,o="/"===s.substr(-1)?s:s+"/";e.innerHTML=o}document.addEventListener("DOMContentLoaded",function(){void 0===window.docusaurus&&insertBanner()})

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Kotest is a multiplatform Kotlin test framework with powerful assertions, integrated property testing, and multiple expressive styles.

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Test Framework

Test Framework

The Kotest test framework supports multiple test styles with unlimited nesting, natural language test names, and coroutine support at every level.

The out of the box DSL provides support for parameterized tests, data-driven testing, conditional evaluation, test lifecycle callbacks, extensive parallelism and more.

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Multiplatform Support

Multiplatform Support

Kotest is fully multiplatform with support for JVM, JS, Native (Linux, Windows, iOS, macOS, tvOS, watchOS), Wasm, and Android unit and instrumented tests.

Multiplatform support leverages the existing Kotlin Gradle tasks for seamless integration into the Kotlin ecosystem.

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Powerful Assertions

Powerful Assertions

The assertions library provides over 350 rich assertions to verify code state with fluent, expressive, and idiomatic Kotlin syntax.

It comes equipped with collection inspectors, non-determistic utilities, grouped assertion support, support for power-assertion and extensions for Arrow, JSON, kotlinx-datetime and more.

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Property Testing

Property Testing

The property testing module uses Kotlin's powerful DSL support to create succinent and powerful property based tests.

It supports generating values for over 100 types, failure shrinking, compose and extend generators, exhaustive checks, repeatable random seeds, coverage metrics, and more.

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Third Party Extensions

Third Party Extensions

Many projects in the Kotlin and JVM ecosystem have Kotest integration available, such as Spring, Koin, Test Containers, Blockhound, Micronaut and more.

It is easy to add your own integration using Kotest's extensive extensibility model.

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