In the last weeks KotlinTest got some new and useful features:

Testing for Exceptions

val exception = shouldThrow<IllegalAccessException> { // code in here that you expect to throw an IllegalAccessException } exception.message should start with "Something went wrong"

Before and after each

override fun beforeEach() { println("Test starting") } override fun afterEach() { println("Test completed") }

Test configuration

Each test case can be followed by a call to the config function.

To execute a test ten times with two threads you would write:

class MyTests : ShouldSpec() { init { should("return the length of the string") { "sammy".length shouldBe 5 "".length shouldBe 0 }.config(invocations = 10, threads = 2) } }

You can tag tests to be able run them selectively:

... }.config(tags = listOf("database", "linux"))

Timeouts are configured like this:

... }.config(timeout = 2, timeoutUnit = TimeUnit.SECONDS)

To ignore a test, you set ignored to true:

... }.config(ignored = true)

Future

Some more features like property based (and table driven) testing are on the roadmap.