Using Akka Route TestKit with Kotlin Spek - kotlin

Question

I am trying to test my AkkaHTTP routes (written in Kotlin) using akka-http-testkit. The tests in our project use Spek and I would like to keep it this way.
The Route TestKit tutorial gives a Java example:
public class TestkitExampleTest extends JUnitRouteTest {
TestRoute appRoute = testRoute(new MyAppService().createRoute())
#Test
public void testCalculatorAdd() {
// test happy path
appRoute.run(HttpRequest.GET("/calculator/add?x=4.2&y=2.3"))
.assertStatusCode(200)
.assertEntity("x + y = 6.5")
// test responses to potential errors
appRoute.run(HttpRequest.GET("/calculator/add?x=3.2"))
.assertStatusCode(StatusCodes.NOT_FOUND) // 404
.assertEntity("Request is missing required query parameter 'y'")
// test responses to potential errors
appRoute.run(HttpRequest.GET("/calculator/add?x=3.2&y=three"))
.assertStatusCode(StatusCodes.BAD_REQUEST)
.assertEntity("The query parameter 'y' was malformed:\n" +
"'three' is not a valid 64-bit floating point value")
}
}
The setup uses the testRoute function, which means the test class must extend JUnitRouteTest.
Attempting to translate to a Kotlin Spek test I got this:
class TestKitExampleTest : JUnitRouteTest(), Spek({
describe("My routes") {
val appRoute = testRoute(MyAppService().createRoute())
it("calculator add") {
// test happy path
appRoute.run(HttpRequest.GET("/calculator/add?x=4.2&y=2.3"))
.assertStatusCode(200)
.assertEntity("x + y = 6.5")
//...rest omitted
}
}
})
which does not compile as the class is attempting to inherit two classes. I converted it to the following instead:
class TestKitExampleTest : Spek({
describe("My routes") {
val appRoute = testRoute(MyAppService().createRoute())
it("calculator add") {
// test happy path
appRoute.run(HttpRequest.GET("/calculator/add?x=4.2&y=2.3"))
.assertStatusCode(200)
.assertEntity("x + y = 6.5")
//...rest omitted
}
}
}) {
companion object : JUnitRouteTest()
}
which encouters the runtime error java.lang.IllegalStateException: Unknown factory null
at akka.http.impl.util.package$.actorSystem(package.scala:34).
Is there a way to use Akka's route testkit with Spek? Or is there another way to test these routes?

Answer 1

As #raniejade mentioned above, answered on Github. JUnitRouteTest bootstraps Akka with a rule, but Spek's LifeCycleListener can do the same thing.
Adding the code:
class SpekRouteBootstrapper: LifecycleListener, JUnitRouteTest() {
override fun beforeExecuteTest(test: TestScope) {
systemResource().before()
}
override fun afterExecuteTest(test: TestScope) {
systemResource().after()
}
}
allowed me to do this on the test class:
class TestKitExampleTest: Spek({
val bootstrapper = SpekRouteBootstrapper()
registerListener(bootstrapper)
describe("My routes") {
val appRoute by memoized {
bootstrapper.testRoute(MyAppService().createRoute())
}
it("calculator add") {
// test happy path
appRoute.run(HttpRequest.GET("/calculator/add?x=4.2&y=2.3"))
.assertStatusCode(200)
.assertEntity("x + y = 6.5")
}
}
})