Kotlin - HelpMeTest (Page 2)

Testing

KMP Unit Testing with kotlin.test and MockK

Kotlin Multiplatform (KMP) brings a challenge that pure Android or pure iOS developers don't face: your unit tests need to run on multiple runtimes. The kotlin.test library and MockK together form the standard testing stack for KMP projects. Here's how to use them effectively. The

Kotlin

Spring Boot Testing with Kotlin: @SpringBootTest, MockMvc, and TestRestTemplate

Spring Boot's test support is comprehensive, and Kotlin's concise syntax makes test setup significantly less verbose than the equivalent Java. This guide covers the main testing strategies for Spring Boot applications written in Kotlin. Dependencies // build.gradle.kts dependencies { testImplementation("org.springframework.boot:spring-boot-starter-test"

Kotlin

Testing Kotlin Coroutines: runTest, turbine for Flow, and Best Practices

Testing asynchronous Kotlin code used to require Thread.sleep and other workarounds. The kotlinx-coroutines-test library provides proper tools: virtual time, controlled dispatchers, and runTest — which makes async tests run synchronously without any thread juggling. Dependencies // build.gradle.kts testImplementation("org.jetbrains.kotlinx:kotlinx-coroutines-test:1.8.1") testImplementation("

Kotlin

MockK Guide: Mocking in Kotlin with mockk

MockK is the go-to mocking library for Kotlin. Unlike Mockito (which was designed for Java), MockK understands Kotlin's type system — it handles data class, object, companion object, extension functions, coroutines, and final classes without workarounds. Installation // build.gradle.kts testImplementation("io.mockk:mockk:1.13.12"

Kotlin

Kotest Guide: Kotlin Testing Framework with Multiple Spec Styles

Kotest is a pure-Kotlin testing framework that goes beyond JUnit 5's Java roots. It offers multiple specification styles, a rich matcher library, built-in property testing, and first-class coroutine support. If you want test code that reads like idiomatic Kotlin, Kotest is worth learning. Installation // build.gradle.kts dependencies

Kotlin

Kotlin Unit Testing Guide: JUnit 5, Assertions, and Test Structure

Kotlin runs on the JVM and integrates seamlessly with the Java testing ecosystem. JUnit 5 is the standard choice for Kotlin projects, but Kotlin's language features — named parameters, extension functions, infix notation, and data classes — enable more expressive test code than Java allows. This guide covers how to

Kotlin

Android Instrumented Testing with Espresso and Kotlin

Android has two types of tests: unit tests (JVM, fast) and instrumented tests (run on a device or emulator, access Android APIs). Instrumented tests are required for testing UI behavior, database operations, and anything that depends on the Android framework. This guide covers instrumented tests using Espresso for View-based UI