RUBY-1101 SSL and Unix sockets are only connectable if they've been created

Author: estolfo

lib/mongo/server/connection.rb

@@ -56,7 +56,7 @@ class Connection
       #
       # @since 2.0.0
       def connect!
-        unless socket
+        unless socket && socket.connectable?
           @socket = address.socket(timeout, ssl_options)
           socket.connect!
           authenticate!

lib/mongo/socket/ssl.rb

@@ -99,6 +99,18 @@ def readbyte
         end
       end
 
+      # This socket can only be used if the ssl socket (@socket) has been created.
+      #
+      # @example Is the socket connectable?
+      #   socket.connectable?
+      #
+      # @return [ true, false ] If the socket is connectable.
+      #
+      # @since 2.2.5
+      def connectable?
+        !!@socket
+      end
+
       private
 
       def create_context(options)

lib/mongo/socket/tcp.rb

@@ -64,6 +64,18 @@ def initialize(host, port, timeout, family)
         @host, @port, @timeout = host, port, timeout
         super(family)
       end
+
+      # This object does not wrap another socket so it's always connectable.
+      #
+      # @example Is the socket connectable?
+      #   socket.connectable?
+      #
+      # @return [ true, false ] If the socket is connectable.
+      #
+      # @since 2.2.5
+      def connectable?
+        true
+      end
     end
   end
 end

lib/mongo/socket/unix.rb

@@ -55,6 +55,18 @@ def initialize(path, timeout)
         @socket = ::UNIXSocket.new(path)
         set_socket_options(@socket)
       end
+
+      # This socket can only be used if the unix socket (@socket) has been created.
+      #
+      # @example Is the socket connectable?
+      #   socket.connectable?
+      #
+      # @return [ true, false ] If the socket is connectable.
+      #
+      # @since 2.2.5
+      def connectable?
+        !!@socket
+      end
     end
   end
 end