fix breaking test

libp2p/switch.nim

@@ -93,6 +93,9 @@ proc mux(s: Switch, conn: Connection): Future[void] {.async, gcsafe.} =
   debug "muxing connection"
   ## mux incoming connection
   let muxers = toSeq(s.muxers.keys)
+  if muxers.len == 0:
+    return
+
   let muxerName = await s.ms.select(conn, muxers)
   if muxerName.len == 0 or muxerName == "na":
     return
@@ -252,7 +255,7 @@ proc newSwitch*(peerInfo: PeerInfo,
                 transports: seq[Transport],
                 identity: Identify,
                 muxers: Table[string, MuxerProvider],
-                secureManagers: Table[string, Secure],
+                secureManagers: Table[string, Secure] = initTable[string, Secure](),
                 pubSub: Option[PubSub] = none(PubSub)): Switch =
   new result
   result.peerInfo = peerInfo
@@ -283,6 +286,7 @@ proc newSwitch*(peerInfo: PeerInfo,
 
   if result.secureManagers.len == 0:
     # use plain text if no secure managers are provided
+    debug "no secure managers, falling back to palin text", codec = PlainTextCodec
     result.secureManagers[PlainTextCodec] = Secure(newPlainText())
 
   if pubSub.isSome:

tests/testswitch.nim

@@ -12,7 +12,9 @@ import ../libp2p/switch,
        ../libp2p/protocols/protocol, 
        ../libp2p/muxers/muxer,
        ../libp2p/muxers/mplex/mplex, 
-       ../libp2p/muxers/mplex/types
+       ../libp2p/muxers/mplex/types,
+       ../libp2p/protocols/secure/secio,
+       ../libp2p/protocols/secure/secure
 
 const TestCodec = "/test/proto/1.0.0"
 
@@ -44,6 +46,7 @@ suite "Switch":
       let mplexProvider = newMuxerProvider(createMplex, MplexCodec)
       let transports = @[Transport(newTransport(TcpTransport))]
       let muxers = [(MplexCodec, mplexProvider)].toTable()
+      # let secureManagers = [(SecioCodec, Secure(newSecio(seckey)))].toTable()
       let switch = newSwitch(peerInfo, transports, identify, muxers)
       result = (switch, peerInfo)