Websocket Unit test : WS from ScalaTestRouteTest doesnt do a websocket request - akka-stream

Question

I am trying to put in place a unit test for websocket. From the doc, I should be able to use WS
See below a sscce
package com.streamingout
import akka.http.scaladsl.model.ws.TextMessage
import akka.http.scaladsl.server.Directives._
import akka.http.scaladsl.server.PathMatchers.Rest
import akka.http.scaladsl.testkit.{ScalatestRouteTest, WSProbe}
import akka.stream.scaladsl.{Flow, Sink, Source}
import org.scalatest.{FlatSpec, Matchers}
class Test extends FlatSpec with Matchers with ScalatestRouteTest{
//--------------- Flow ---------------
def flow = {
import scala.concurrent.duration._
val source = Source.tick(initialDelay = 0 second, interval = 1 second, tick = TextMessage("tick"))
Flow.fromSinkAndSource(Sink.ignore, source)
}
//-------------- Routing ------------
def route = {
path("/wskt") {
println("websocket ws")
handleWebSocketMessages(flow)
} ~
path(Rest) { pathRest =>
println("path Rest")
getFromFile(s"webapp/$pathRest")
}
}
// create a testing probe representing the client-side
val wsClient = WSProbe()
// WS creates a WebSocket request for testing
WS("/wskt", wsClient.flow) ~> route ~> check {
// check response for WS Upgrade headers
isWebSocketUpgrade shouldEqual true
}
}
When I run the test, I can see in my console the path Rest message, meaning that WS doesnt upgrade to Websocket.
Anyone knows what is wrong with my code?
I am using akka 2.4.7
Thank you

Answer 1

To make the above code work, in the route, the path /wkst should be without any leading slash
def route = {
path("wskt") {
println("websocket ws")
handleWebSocketMessages(flow)
} ~
path(Rest) { pathRest =>
println("path Rest")
getFromFile(s"webapp/$pathRest")
}
}