Fix socket references

lib/mongo/socket.rb

@@ -56,9 +56,9 @@ class Socket
     #
     # @since 2.0.0
     def alive?
-      sock_arr = [@socket]
+      sock_arr = [ @socket ]
       if Kernel::select(sock_arr, nil, sock_arr, 0)
-        !eof?
+        !@socket.eof?
       else
         true
       end
@@ -75,7 +75,7 @@ def alive?
     #
     # @since 2.0.0
     def close
-      socket.close rescue true
+      @socket.close rescue true
       true
     end
 

lib/mongo/socket/ssl.rb

@@ -63,13 +63,6 @@ def connect!
         end
       end
 
-      # Tests if this socket has reached EOF. Primarily used for liveness checks.
-      #
-      # @since 2.0.0
-      def eof?
-        @tcp_socket.eof?
-      end
-
       # Initializes a new SSL socket.
       #
       # @example Create the SSL socket.

spec/mongo/socket/ssl_spec.rb

@@ -44,7 +44,7 @@
       end
     end
 
-    context 'when a CA certificate is provided' do
+    context 'when a CA certificate is provided', if: running_ssl? && testing_locally? do
 
       let(:options) do
         {

spec/spec_helper.rb

@@ -146,6 +146,10 @@ def list_command_enabled?
   $list_command_enabled ||= $mongo_client.cluster.servers.first.features.list_indexes_enabled?
 end
 
+def testing_locally?
+  !(ENV['CI'] || ENV['JENKINS_HOME'])
+end
+
 def running_ssl?
   SSL
 end