trying to fix immediate exit of server

Author: ivan-klass

client/testserver/src/main/scala/sttp/tapir/client/tests/HttpServer.scala

@@ -34,7 +34,7 @@ class HttpServer(port: Port) {
 
   private val logger = LoggerFactory.getLogger(getClass)
 
-  private var stopServer: IO[Unit] = _
+  private val stopServer: Deferred[IO, Unit] = Deferred.unsafe[IO, Unit]
 
   //
 
@@ -214,21 +214,19 @@ class HttpServer(port: Port) {
   //
 
   def start(): Unit = {
-    val (_, _stopServer) = EmberServerBuilder
+    EmberServerBuilder
       .default[IO]
       .withPort(ip4s.Port.fromInt(port).get)
       .withHttpWebSocketApp(app)
       .build
-      .allocated
+      .use(_ => stopServer.get)
       .unsafeRunSync()
 
-    stopServer = _stopServer
-
     logger.info(s"Server on port $port started")
   }
 
   def close(): Unit = {
-    stopServer.unsafeRunSync()
+    stopServer.complete(()).unsafeRunSync()
     logger.info(s"Server on port $port stopped")
   }
 }