Kotest

Kotest is a flexible and comprehensive testing tool for Kotlin with multiplatform support. Powerful, elegant, and flexible test framework for Kotlin with additional assertions, property testing, and data-driven testing. The Kotest test framework enables tests to be laid out in a fluid way and execute them on JVM, Javascript, or native platforms. With built-in coroutine support at every level, the ability to use functions such as test lifecycle callbacks, extensive extension points, advanced conditional evaluation, powerful data-driven testing, and more. The Kotest assertions library is a Kotlin-first multi-platform assertions library with over 300 rich assertions. It comes equipped with collection inspectors, non-deterministic test helpers, soft assertions, modules for arrow, json, kotlinx-datetime and much more.