Move connection pool finalizer to connection pool

lib/mongo/server.rb

@@ -277,11 +277,8 @@ def summary
     def pool
       @pool_lock.synchronize do
         @pool ||= begin
-          ConnectionPool.get(self).tap do |pool|
-            finalizer = proc do
-              pool.disconnect
-            end
-            ObjectSpace.define_finalizer(self, finalizer)
+          ConnectionPool.new(options) do |generation|
+            Connection.new(self, options.merge(generation: generation))
           end
         end
       end

lib/mongo/server/connection_pool.rb

@@ -42,8 +42,13 @@ class ConnectionPool
       #
       # @since 2.0.0
       def initialize(options = {}, &block)
-        @options = options.freeze
-        @queue = Queue.new(options, &block)
+        @options = options.dup.freeze
+        @queue = queue = Queue.new(@options, &block)
+
+        finalizer = proc do
+          queue.disconnect
+        end
+        ObjectSpace.define_finalizer(self, finalizer)
       end
 
       # @return [ Hash ] options The pool options.
@@ -120,27 +125,6 @@ def with_connection
       protected
 
       attr_reader :queue
-
-      private
-
-      class << self
-
-        # Creates a new connection pool for the provided server.
-        #
-        # @example Create a new connection pool.
-        #   Mongo::Server::ConnectionPool.get(server)
-        #
-        # @param [ Mongo::Server ] server The server.
-        #
-        # @return [ Mongo::Server::ConnectionPool ] The connection pool.
-        #
-        # @since 2.0.0
-        def get(server)
-          ConnectionPool.new(server.options) do |generation|
-            Connection.new(server, server.options.merge(generation: generation))
-          end
-        end
-      end
     end
   end
 end

spec/mongo/server_spec.rb

@@ -25,7 +25,7 @@
   end
 
   let(:pool) do
-    Mongo::Server::ConnectionPool.get(server)
+    server.pool
   end
 
   describe '#==' do