no exception should be thrown when a close message is received

Author: doghappy

src/SocketIOClient/Protocol/WebSocket/WebSocketAdapter.cs

@@ -37,8 +37,6 @@ private async Task ReceiveAsync(CancellationToken cancellationToken)
                         protocolMessage.Type = ProtocolMessageType.Bytes;
                         protocolMessage.Bytes = message.Bytes;
                         break;
-                    default:
-                        throw new ArgumentException();
                 }
 
                 await OnNextAsync(protocolMessage).ConfigureAwait(false);

tests/SocketIOClient.UnitTests/Protocol/WebSocket/WebSocketAdapterTests.cs

@@ -171,10 +171,29 @@ public async Task ReceiveAsync_ExceptionOccurred_OnDisconnectInvoked()
 
         await _wsAdapter.ConnectAsync(new Uri("ws://127.0.0.1:1234"), CancellationToken.None);
 
-        await Task.Delay(400).ConfigureAwait(false);
+        await Task.Delay(200).ConfigureAwait(false);
         _onDisconnect.Received().Invoke();
     }
 
+    [Fact]
+    public async Task ReceiveAsync_CloseMessage_OnDisconnectNotInvoked()
+    {
+        _clientAdapter.ReceiveAsync(Arg.Any<CancellationToken>())
+           .Returns(async _ =>
+           {
+               await Task.Delay(20).ConfigureAwait(false);
+               return new WebSocketMessage
+               {
+                   Type = WebSocketMessageType.Close,
+               };
+           });
+
+        await _wsAdapter.ConnectAsync(new Uri("ws://127.0.0.1:1234"), CancellationToken.None);
+
+        await Task.Delay(200).ConfigureAwait(false);
+        _onDisconnect.DidNotReceive().Invoke();
+    }
+
     [Fact]
     public void SetDefaultHeader_WhenCalled_AlwaysCallClientAdapterSetDefaultHeader()
     {