Source link: https://github.com/kotlintest/kotlintest

KotlinTest is a flexible and comprehensive testing tool for Kotlin.
Full documentation

For latest updates see Changelog


How to use

For latest updates see Changelog.

Test with Style

Write simple and beautiful tests with the StringSpec style:

class MyTests : StringSpec() {

init {

"length should return size of string" {

 "hello".length shouldBe 5


You can choose the testing style that fits your needs.

Let the Computer Generate Your Test Data

Use property based testing to test your code with automatically generated test data:

class PropertyExample: StringSpec() {

init {

  "String size" {

 forAll {
 a: String, b: String ->

(a + b).length == a.length + b.length



Check all the Tricky Cases With Table Testing

Handle even an enormous amount of input parameter combinations easily with table driven tests:

class StringSpecExample : StringSpec() {

init {

"should add" {

  val myTable = table(

 headers("a", "b", "result"),

 row(1, 2, 3),

 row(1, 1, 2)


  forAll(myTable) {
 a, b, result ->

 a + b shouldBe result




Test Exceptions

Testing for exceptions is easy with KotlinTest:

val exception = shouldThrow<IllegalAccessException> {

// code in here that you expect to throw an IllegalAccessException 
 exception.message should startWith("Something went wrong")

Fine Tune Test Execution

You can specify the number of threads, invocations, and a timeout for each test or for all tests. And you can group tests by tags or disable them conditionally. All you need is config:

class MySpec : StringSpec() {

 override val defaultTestCaseConfig = TestCaseConfig(invocations = 3)
 init {

  "should use config" {

 // ...
.config(timeout = 2.seconds, invocations = 10, threads = 2, tags = setOf(Database, Linux))


And More ...

This page gives you just a short overview over KotlinTest. There are some more useful things:

See full documentation.



testCompile 'io.kotlintest:kotlintest:xxx' 


  <scope>test</scope> </dependency>


Simple library that helps creating a "Tap Bar" menu layout.

Card Menu View.

Android widget. Combination of EditText and SeekBar.

Android widget combination of ImageView, EditText and TextView.

Keep calm and stay easy with multiple language supported in your android application.

Tracklytics is an annotation based analytic tools aggregator with using AOP to track events and crashes. It basically collects all analytic/tracking tools together and provide a simple and clean solution without polluting your code base.


2D Engines   3D Engines   9-Patch   Action Bars   Activities   ADB   Advertisements   Analytics   Animations   ANR   AOP   API   APK   APT   Architecture   Audio   Autocomplete   Background Processing   Backward Compatibility   Badges   Bar Codes   Benchmarking   Bitmaps   Bluetooth   Blur Effects   Bread Crumbs   BRMS   Browser Extensions   Build Systems   Bundles   Buttons   Caching   Camera   Canvas   Cards   Carousels   Changelog   Checkboxes   Cloud Storages   Color Analysis   Color Pickers   Colors   Comet/Push   Compass Sensors   Conferences   Content Providers   Continuous Integration   Crash Reports   Credit Cards   Credits   CSV   Curl/Flip   Data Binding   Data Generators   Data Structures   Database   Database Browsers   Date &   Debugging   Decompilers   Deep Links   Dependency Injections   Design   Design Patterns   Dex   Dialogs   Distributed Computing   Distribution Platforms   Download Managers   Drawables   Emoji   Emulators   EPUB   Equalizers &   Event Buses   Exception Handling   Face Recognition   Feedback &   File System   File/Directory   Fingerprint   Floating Action   Fonts   Forms   Fragments   FRP   FSM   Functional Programming   Gamepads   Games   Geocaching   Gestures   GIF   Glow Pad   Gradle Plugins   Graphics   Grid Views   Highlighting   HTML   HTTP Mocking   Icons   IDE   IDE Plugins   Image Croppers   Image Loaders   Image Pickers   Image Processing   Image Views   Instrumentation   Intents   Job Schedulers   JSON   Keyboard   Kotlin   Layouts   Library Demos   List View   List Views   Localization   Location   Lock Patterns   Logcat   Logging   Mails   Maps   Markdown   Mathematics   Maven Plugins   MBaaS   Media   Menus   Messaging   MIME   Mobile Web   Native Image   Navigation   NDK   Networking   NFC   NoSQL   Number Pickers   OAuth   Object Mocking   OCR Engines   OpenGL   ORM   Other Pickers   Parallax List   Parcelables   Particle Systems   Password Inputs   PDF   Permissions   Physics Engines   Platforms   Plugin Frameworks   Preferences   Progress Indicators   ProGuard   Properties   Protocol Buffer   Pull To   Purchases   Push/Pull   QR Codes   Quick Return   Radio Buttons   Range Bars   Ratings   Recycler Views   Resources   REST   Ripple Effects   RSS   Screenshots   Scripting   Scroll Views   SDK   Search Inputs   Security   Sensors   Services   Showcase Views   Signatures   Sliding Panels   Snackbars   SOAP   Social Networks   Spannable   Spinners   Splash Screens   SSH   Static Analysis   Status Bars   Styling   SVG   System   Tags   Task Managers   TDD &   Template Engines   Testing   Testing Tools   Text Formatting   Text Views   Text Watchers   Text-to   Toasts   Toolkits For   Tools   Tooltips   Trainings   TV   Twitter   Updaters   USB   User Stories   Utils   Validation   Video   View Adapters   View Pagers   Views   Watch Face   Wearable Data   Wearables   Weather   Web Tools   Web Views   WebRTC   WebSockets   Wheel Widgets   Wi-Fi   Widgets   Windows   Wizards   XML   XMPP   YAML   ZIP Codes