clear warnings in http-core

http-core/src/main/scala/org/apache/pekko/http/impl/engine/http2/Http2.scala

@@ -293,7 +293,7 @@ private[http] object Http2 extends ExtensionId[Http2Ext] with ExtensionIdProvide
   override def get(system: ClassicActorSystemProvider): Http2Ext = super.get(system)
   def apply()(implicit system: ClassicActorSystemProvider): Http2Ext = super.apply(system)
   override def apply(system: ActorSystem): Http2Ext = super.apply(system)
-  def lookup(): ExtensionId[_ <: Extension] = Http2
+  def lookup: ExtensionId[_ <: Extension] = Http2
   def createExtension(system: ExtendedActorSystem): Http2Ext = new Http2Ext()(system)
 
   private[http] type HttpImplementation = Flow[SslTlsInbound, SslTlsOutbound, ServerTerminator]

http-core/src/main/scala/org/apache/pekko/http/impl/engine/rendering/BodyPartRenderer.scala

@@ -151,7 +151,7 @@ private[http] object BodyPartRenderer {
   def randomBoundary(length: Int = 18, random: java.util.Random = ThreadLocalRandom.current()): String = {
     val array = new Array[Byte](length)
     random.nextBytes(array)
-    Base64.custom.encodeToString(array, false)
+    Base64.custom().encodeToString(array, false)
   }
 
   /**

http-core/src/main/scala/org/apache/pekko/http/impl/engine/rendering/RenderSupport.scala

@@ -56,7 +56,7 @@ private[http] object RenderSupport {
   val defaultLastChunkBytes: ByteString = renderChunk(HttpEntity.LastChunk)
 
   def CancelSecond[T, Mat](first: Source[T, Mat], second: Source[T, Any]): Source[T, Mat] = {
-    Source.fromGraph(GraphDSL.create(first) { implicit b => frst =>
+    Source.fromGraph(GraphDSL.createGraph(first) { implicit b => frst =>
       import GraphDSL.Implicits._
       second ~> Sink.cancelled
       SourceShape(frst.out)

http-core/src/main/scala/org/apache/pekko/http/impl/model/parser/CharacterClasses.scala

@@ -13,7 +13,6 @@
 
 package org.apache.pekko.http.impl.model.parser
 
-import org.apache.pekko
 import org.parboiled2.CharPredicate
 
 // efficient encoding of *7-bit* ASCII characters

http-core/src/main/scala/org/apache/pekko/http/javadsl/Http.scala

@@ -43,7 +43,7 @@ import pekko.stream.scaladsl.Keep
 object Http extends ExtensionId[Http] with ExtensionIdProvider {
   override def get(system: ActorSystem): Http = super.get(system)
   override def get(system: ClassicActorSystemProvider): Http = super.get(system)
-  def lookup() = Http
+  def lookup = Http
   def createExtension(system: ExtendedActorSystem): Http = new Http(system)
 }
 

http-core/src/main/scala/org/apache/pekko/http/javadsl/settings/ParserSettings.scala

@@ -27,7 +27,6 @@ import pekko.http.impl.util.JavaMapping.Implicits._
 import scala.annotation.varargs
 import scala.collection.JavaConverters._
 import pekko.http.javadsl.model.{ HttpMethod, MediaType, StatusCode, Uri }
-import scala.annotation.nowarn
 import com.typesafe.config.Config
 
 /**
@@ -138,7 +137,6 @@ object ParserSettings extends SettingsCompanion[ParserSettings] {
    */
   @Deprecated
   @deprecated("Use forServer or forClient instead", since = "Akka HTTP 10.2.0")
-  @nowarn("msg=create overrides concrete, non-deprecated symbol")
   override def create(system: ActorSystem): ParserSettings = create(system.settings.config)
 
   def forServer(system: ClassicActorSystemProvider): ParserSettings =

http-core/src/main/scala/org/apache/pekko/http/scaladsl/Http.scala

@@ -189,7 +189,6 @@ class HttpExt @InternalStableApi /* constructor signature is hardcoded in Teleme
   @deprecated(
     "Use Http().newServerAt(...)...connectionSource() to create a source that can be materialized to a binding.",
     since = "10.2.0")
-  @nowarn("msg=deprecated")
   def bind(interface: String, port: Int = DefaultPortForProtocol,
       connectionContext: ConnectionContext = defaultServerHttpContext,
       settings: ServerSettings = ServerSettings(system),
@@ -238,7 +237,6 @@ class HttpExt @InternalStableApi /* constructor signature is hardcoded in Teleme
    * use the `pekko.http.server` config section or pass in a [[pekko.http.scaladsl.settings.ServerSettings]] explicitly.
    */
   @deprecated("Use Http().newServerAt(...)...bindFlow() to create server bindings.", since = "10.2.0")
-  @nowarn("msg=deprecated")
   def bindAndHandle(
       handler: Flow[HttpRequest, HttpResponse, Any],
       interface: String, port: Int = DefaultPortForProtocol,
@@ -320,7 +318,6 @@ class HttpExt @InternalStableApi /* constructor signature is hardcoded in Teleme
    * use the `pekko.http.server` config section or pass in a [[pekko.http.scaladsl.settings.ServerSettings]] explicitly.
    */
   @deprecated("Use Http().newServerAt(...)...bindSync() to create server bindings.", since = "10.2.0")
-  @nowarn("msg=deprecated")
   def bindAndHandleSync(
       handler: HttpRequest => HttpResponse,
       interface: String, port: Int = DefaultPortForProtocol,
@@ -349,7 +346,6 @@ class HttpExt @InternalStableApi /* constructor signature is hardcoded in Teleme
    * Any other value for `parallelism` overrides the setting.
    */
   @deprecated("Use Http().newServerAt(...)...bind() to create server bindings.", since = "10.2.0")
-  @nowarn("msg=deprecated")
   def bindAndHandleAsync(
       handler: HttpRequest => Future[HttpResponse],
       interface: String, port: Int = DefaultPortForProtocol,
@@ -1133,7 +1129,7 @@ object Http extends ExtensionId[HttpExt] with ExtensionIdProvider {
   def apply()(implicit system: ClassicActorSystemProvider): HttpExt = super.apply(system)
   override def apply(system: ActorSystem): HttpExt = super.apply(system)
 
-  def lookup() = Http
+  def lookup = Http
 
   def createExtension(system: ExtendedActorSystem): HttpExt =
     new HttpExt(system.settings.config.getConfig("pekko.http"))(system)

http-core/src/main/scala/org/apache/pekko/http/scaladsl/model/HttpEntity.scala

@@ -14,12 +14,10 @@
 package org.apache.pekko.http.scaladsl.model
 
 import java.util.OptionalLong
-
 import language.implicitConversions
 import java.io.File
 import java.nio.file.{ Files, Path }
 import java.lang.{ Iterable => JIterable }
-
 import scala.util.control.NonFatal
 import scala.concurrent.Future
 import scala.concurrent.duration._
@@ -38,10 +36,10 @@ import pekko.http.impl.util.JavaMapping.Implicits._
 import scala.compat.java8.OptionConverters._
 import scala.compat.java8.FutureConverters._
 import java.util.concurrent.CompletionStage
-
 import pekko.actor.ClassicActorSystemProvider
 import pekko.annotation.{ DoNotInherit, InternalApi }
 
+import scala.annotation.nowarn
 import scala.compat.java8.FutureConverters
 
 /**
@@ -664,6 +662,7 @@ object HttpEntity {
         private var maxBytes = -1L
         private var bytesLeft = Long.MaxValue
 
+        @nowarn("msg=getFirst in class Attributes is deprecated") // there's no valid alternative right now
         override def preStart(): Unit = {
           attributes.getFirst[SizeLimit] match {
             case Some(limit: SizeLimit) if limit.isDisabled =>

http-core/src/main/scala/org/apache/pekko/http/scaladsl/model/headers/HttpCredentials.scala

@@ -33,7 +33,7 @@ final case class BasicHttpCredentials(username: String, password: String) extend
   val cookie = {
     val userPass = username + ':' + password
     val bytes = userPass.getBytes(`UTF-8`.nioCharset)
-    Base64.rfc2045.encodeToChar(bytes, false)
+    Base64.rfc2045().encodeToChar(bytes, false)
   }
   def render[R <: Rendering](r: R): r.type = r ~~ "Basic " ~~ cookie
 
@@ -44,7 +44,7 @@ final case class BasicHttpCredentials(username: String, password: String) extend
 
 object BasicHttpCredentials {
   def apply(credentials: String): BasicHttpCredentials = {
-    val bytes = Base64.rfc2045.decodeFast(credentials.toCharArray)
+    val bytes = Base64.rfc2045().decodeFast(credentials.toCharArray)
     val userPass = new String(bytes, `UTF-8`.nioCharset)
     userPass.indexOf(':') match {
       case -1 => apply(userPass, "")

http-core/src/test/scala/org/apache/pekko/http/impl/engine/client/HostConnectionPoolSpec.scala

@@ -886,7 +886,7 @@ class HostConnectionPoolSpec extends PekkoSpecWithMaterializer(
       //   2. when client connection was established, grab server connection as well and attach to proxies
       //      (cannot be implemented with just mapMaterializedValue because there's no transposing constructor for BidiFlow)
       BidiFlow.fromGraph(
-        GraphDSL.create(Sink.asPublisher[HttpResponse](fanout = false), Source.asSubscriber[HttpRequest],
+        GraphDSL.createGraph(Sink.asPublisher[HttpResponse](fanout = false), Source.asSubscriber[HttpRequest],
           clientConnectionFlow(serverBinding, connectionKillSwitch))((_, _, _)) {
           implicit builder => (resIn, reqOut, client) =>
             import GraphDSL.Implicits._

http-core/src/test/scala/org/apache/pekko/http/impl/engine/client/LowLevelOutgoingConnectionSpec.scala

@@ -1022,7 +1022,8 @@ class LowLevelOutgoingConnectionSpec extends PekkoSpecWithMaterializer with Insi
       val netOut = TestSubscriber.manualProbe[ByteString]()
       val netIn = TestPublisher.manualProbe[ByteString]()
 
-      RunnableGraph.fromGraph(GraphDSL.create(OutgoingConnectionBlueprint(Host("example.com"), settings, NoLogging)) {
+      RunnableGraph.fromGraph(GraphDSL.createGraph(OutgoingConnectionBlueprint(Host("example.com"), settings,
+        NoLogging)) {
         implicit b => client =>
           import GraphDSL.Implicits._
           Source.fromPublisher(netIn)    ~> Flow[ByteString].map(SessionBytes(null, _))             ~> client.in2

http-core/src/test/scala/org/apache/pekko/http/impl/engine/server/HttpServerTestSetupBase.scala

@@ -46,7 +46,7 @@ abstract class HttpServerTestSetupBase {
     val netIn = TestPublisher.probe[ByteString]()
     val netOut = ByteStringSinkProbe()
 
-    RunnableGraph.fromGraph(GraphDSL.create(modifyServer(Http().serverLayer(settings))) { implicit b => server =>
+    RunnableGraph.fromGraph(GraphDSL.createGraph(modifyServer(Http().serverLayer(settings))) { implicit b => server =>
       import GraphDSL.Implicits._
       Source.fromPublisher(netIn) ~> Flow[ByteString].map(SessionBytes(null, _)) ~> server.in2
       server.out1                      ~> Flow[SslTlsOutbound].collect { case SendBytes(x) => x }.buffer(1,

http-core/src/test/scala/org/apache/pekko/http/impl/engine/ws/ByteStringSinkProbe.scala

@@ -64,7 +64,7 @@ private[http] object ByteStringSinkProbe {
       }
       def expectNoBytes(): Unit = {
         ensureRequested()
-        probe.expectNoMsg()
+        probe.expectNoMessage()
       }
       def expectNoBytes(timeout: FiniteDuration): Unit = {
         ensureRequested()

http-core/src/test/scala/org/apache/pekko/http/impl/engine/ws/WSClientAutobahnTest.scala

@@ -50,7 +50,7 @@ object WSClientAutobahnTest extends App {
     s"ws://localhost:9001/updateReports?agent=$agent"
 
   def runCase(caseIndex: Int, agent: String = Agent): Future[CaseStatus] =
-    runWs(runCaseUri(caseIndex, agent), echo).recover { case _ => () }.flatMap { _ =>
+    runWs(runCaseUri(caseIndex, agent), echo).recover { case _ => (): Any }.flatMap { _ =>
       getCaseStatus(caseIndex, agent)
     }
 

http-core/src/test/scala/org/apache/pekko/http/impl/engine/ws/WebSocketClientSpec.scala

@@ -373,7 +373,7 @@ class WebSocketClientSpec extends PekkoSpecWithMaterializer("pekko.http.client.w
       val netIn = TestPublisher.probe[ByteString]()
 
       val graph =
-        RunnableGraph.fromGraph(GraphDSL.create(clientLayer) { implicit b => client =>
+        RunnableGraph.fromGraph(GraphDSL.createGraph(clientLayer) { implicit b => client =>
           import GraphDSL.Implicits._
           Source.fromPublisher(netIn) ~> Flow[ByteString].map(SessionBytes(null, _))             ~> client.in2
           client.out1                 ~> Flow[SslTlsOutbound].collect { case SendBytes(x) => x } ~> netOut.sink

http-core/src/test/scala/org/apache/pekko/http/impl/model/parser/HttpHeaderSpec.scala

@@ -13,10 +13,14 @@
 
 package org.apache.pekko.http.impl.model.parser
 
+import org.scalatest.exceptions.TestFailedException
+import org.scalatest.freespec.AnyFreeSpec
+import org.scalatest.matchers.should.Matchers
+import org.scalatest.matchers.{ MatchResult, Matcher }
+
 import org.apache.pekko
 import pekko.http.scaladsl.settings.ParserSettings.CookieParsingMode
 import pekko.http.impl.model.parser.HeaderParser.Settings
-import org.scalatest.matchers.{ MatchResult, Matcher }
 import pekko.http.impl.util._
 import pekko.http.scaladsl.model.{ HttpHeader, _ }
 import headers._
@@ -29,9 +33,6 @@ import HttpMethods._
 
 import java.net.InetAddress
 import pekko.http.scaladsl.model.MediaType.WithOpenCharset
-import org.scalatest.exceptions.TestFailedException
-import org.scalatest.freespec.AnyFreeSpec
-import org.scalatest.matchers.should.Matchers
 
 class HttpHeaderSpec extends AnyFreeSpec with Matchers {
   val `application/vnd.spray` = MediaType.applicationBinary("vnd.spray", MediaType.Compressible)
@@ -56,7 +57,8 @@ class HttpHeaderSpec extends AnyFreeSpec with Matchers {
           MediaRange.custom("text", Map("foo" -> "bar")),
           MediaType.customBinary("custom", "custom", MediaType.Compressible, params = Map("bar" -> "b>az")))
       "Accept: application/*+xml; version=2" =!=
-        Accept(MediaType.customBinary("application", "*+xml", MediaType.Compressible, params = Map("version" -> "2")))
+        Accept(MediaType.customBinary("application", "*+xml", MediaType.Compressible,
+          params = Map("version" -> "2")): MediaRange)
     }
 
     "Accept-Charset" in {

http-core/src/test/scala/org/apache/pekko/http/scaladsl/settings/ConnectionPoolSettingsSpec.scala

@@ -13,9 +13,6 @@
 
 package org.apache.pekko.http.scaladsl.settings
 
-import scala.util.Failure
-import scala.util.Success
-import scala.util.Try
 import org.apache.pekko
 import pekko.testkit.PekkoSpec
 import pekko.http.scaladsl.model.headers.`User-Agent`
@@ -161,11 +158,6 @@ class ConnectionPoolSettingsSpec extends PekkoSpec {
       settings.forHost("akka.com").minConnections shouldEqual 2
       settings.minConnections shouldEqual 2
     }
-
-    def expectError(configString: String): String = Try(config(configString)) match {
-      case Failure(cause) => cause.getMessage
-      case Success(_)     => fail("Expected a failure when max-open-requests is not a power of 2")
-    }
   }
 
   def config(configString: String): ConnectionPoolSettings =

project/Common.scala

@@ -45,6 +45,9 @@ object Common extends AutoPlugin {
     (if (isJdk8) Seq.empty
      else if (scalaBinaryVersion.value == "2.12") Seq("-target:jvm-1.8")
      else Seq("-release", "8")),
+    Test / scalacOptions ++= Seq(
+      // we sometimes use pattern definitions in tests just for the side-effects and don't care about the extra member
+      "-Wconf:msg=Pattern definition introduces Unit-valued member:s"),
     javacOptions ++=
       Seq("-encoding", "UTF-8") ++ onlyOnJdk8("-source", "1.8") ++ onlyAfterJdk8("--release", "8"),
     // restrict to 'compile' scope because otherwise it is also passed to