Kotlin Unit Testing Examples
This repository contains examples of basic unit tests written in Kotlin. In specific directories you can find gradle buildscript with needed dependencies and configuration, simple unit test and parameterized test.
All sample projects was verified under Gradle 4.10.2 and Intellij IDEA 2018.2.4
Application
UseCase
which provides empty string - to showcase structure of test
methods
DistanceConverter
- converts meters to kilometers in parameterized
tests
MVP
- Model-View-Presenter contract
Gradle, Kotlin & Groovy
This Gradle project is by default configured with Gradleโs Kotlin DSL
The equivalent Groovy build are still available for you copy&pasting
pleasures, they have been renamed as build.gradle.groovy
You can switch between Groovy and Kotlin by running the script
$ ./toggle-kotlin-groovy.sh
Junit4
Attach to project
dependencies{
testCompile group: 'junit', name: 'junit', version: '4.12'
}
Junit5
Attach to project
dependencies {
testCompile('org.junit.jupiter:junit-jupiter-api:5.3.1')
testCompile('org.junit.jupiter:junit-jupiter-params:5.3.1')
testRuntime('org.junit.jupiter:junit-jupiter-engine:5.3.1')
}
test {
useJUnitPlatform()
testLogging {
events "passed", "skipped", "failed"
}
}
KotlinTest
Attach to project
dependencies{
testCompile 'io.kotlintest:kotlintest-runner-junit5:3.1.10'
}
Spek
https://spekframework.org version 2.x
Attach to project
repositories {
mavenCentral()
maven { url "https://dl.bintray.com/spekframework/spek-dev" }
}
test {
useJUnitPlatform {
includeEngines 'spek2'
}
}
dependencies {
testImplementation ('org.spekframework.spek2:spek-dsl-jvm:2.0.0-rc.1') {
exclude group: 'org.jetbrains.kotlin'
}
testRuntimeOnly ('org.spekframework.spek2:spek-runner-junit5:2.0.0-rc.1') {
exclude group: 'org.junit.platform'
exclude group: 'org.jetbrains.kotlin'
}
testCompile('org.junit.jupiter:junit-jupiter-api:5.3.1')
// spek requires kotlin-reflect, can be omitted if already in the classpath
testRuntimeOnly "org.jetbrains.kotlin:kotlin-reflect:$kotlin_version"
}
For Spek you may also need additional Intellij or Android Studio plugin
Mockito
Add to project
repositories {
mavenCentral()
jcenter()
}
dependencies {
testCompile "org.mockito:mockito-core:2.23.0"
testCompile group: 'junit', name: 'junit', version: '4.12'
}
Mockito-Kotlin
Add to project
repositories {
mavenCentral()
jcenter()
}
dependencies {
testCompile "org.mockito:mockito-core:2.23.0"
testCompile "com.nhaarman.mockitokotlin2:mockito-kotlin:2.0.0-RC1"
testCompile group: 'junit', name: 'junit', version: '4.12'
}
Mockk
Add to project
dependencies {
testCompile group: 'junit', name: 'junit', version: '4.12'
testImplementation "io.mockk:mockk:1.8.12"
}
Strikt
Add to project
dependencies {
testImplementation("io.strikt:strikt-core:0.17.0")
}