CODEWITHSUNDEEP
kotlinakkaakka-http
Harry Uglow
Harry Uglow

Reputation: 307

Using Akka Route TestKit with Kotlin Spek

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?

Upvotes: 0

Views: 449

Answers (1)

Harry Uglow
Harry Uglow

Reputation: 307

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")
    }
  }
})

Upvotes: 1

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