Akka HTTP: Example of URI model

AkkaHTTPUriModelExample.scala

package com.tutorial.sample

import akka.http.scaladsl.model._
import akka.http.scaladsl.server.Directives._
import akka.http.scaladsl.server.Route
import akka.http.scaladsl.server.directives.RouteDirectives.complete
import akka.http.scaladsl.testkit.ScalatestRouteTest
import org.scalatest.{Matchers, WordSpec}


trait AkkaHTTPUriModelExample {

  var users: List[String] = Nil

  lazy val userRoutes: Route =
    path("users") {
      parameter('redirect_uri) { redirect_uri =>
        val uri = Uri(redirect_uri)
        try {
          val queryParameters = uri.query(mode = Uri.ParsingMode.Strict).value
          complete(s"Welcome $queryParameters")
        } catch {
          case ex: Exception => {
            failWith(ex)
          }
        }
      }
    }
}

class AkkaHTTPUriModelExampleSpec extends WordSpec with Matchers with ScalatestRouteTest
  with AkkaHTTPUriModelExample {

  lazy val routes = userRoutes

  "UserRoutes" should {
    "return if redirect url is valid" in {
      Get("/users?redirect_uri=http://example.com?name=John") ~> routes ~> check {
        status should ===(StatusCodes.OK)

        entityAs[String] should ===("""Welcome John""")
      }
    }

    "not return if redirect url is invalid" in {
      Get("/users?redirect_uri=http://example.com?^name=John") ~> routes ~> check {
        status should ===(StatusCodes.InternalServerError)
      }

    }
  }
}