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Blog

#kotlinDevChallenge 2023 summary

How to mock data class?

Short answer: you don't. Instead...

4 Ways to Leverage Kotest Specs for More Robust Testing

When it comes to testing in Kotlin, we often default to jUnit as the go-to framework. However, there's an alternative that offers a variety of powerful features – Kotest. Kotest provides a variety of spec styles, each with its unique capabilities, that make writing tests a breeze.

Are unit tests worth it?

StateFlow vs SharedFlow

How to refactor your code (without turning the project inside-out)

Idiomatic Kotlin in tests: idiomatic stubbings

In this article we will explore several ways of creating stubs… using Kotlin idioms.

Unit testing on Android – test pyramide

Are you programming for Android and wondering how to write tests for your app? Or maybe you don't have any tests in your project and don't know how to live? Get to know my philosophy of creating tests for Android.

De-mock your tests: practical recipes

Examples of de-mocking test code as presented on Droidcon Berlin 2022.

Stubbing with doAnswer vs doReturn – what’s the difference?

Most of the times while stubbing with Mockito or MockK you will use doReturn construction. But do you know, that you can stub your test double method in other way – with doAnswer. Let's take a look a both stubbing types.

How to mock final classes in Kotlin with Mockito?

Mockito cannot mock/spy because your class is final class? We can fix that.

How to use jUnit4 & jUnit5 in one project?

When you have existing test suite containing jUni4 tests and you want to migrate slowly to jUnit5 to make use of new APIs and modern test engine, you may encounter some issues – not all tests will be visible in reports.

Libraries for Kotlin & JVM Testing

JVM and Kotlin testing libraries - Gradle dependencies and latest versions.