make #write_request private

Author: Jerry Cheung

lib/net/ldap/connection.rb

@@ -146,6 +146,7 @@ def write(packet)
   def write_request(request, controls = nil)
     write([next_msgid.to_ber, request, controls].compact.to_ber_sequence)
   end
+  private :write_request
 
   def next_msgid
     @msgid ||= 0

test/test_ldap_connection.rb

@@ -26,22 +26,22 @@ def test_write_request
     mock = Minitest::Mock.new
     mock.expect(:write, true, [[1.to_ber, "request"].to_ber_sequence])
     conn = Net::LDAP::Connection.new(:socket => mock)
-    conn.write_request("request")
+    conn.send(:write_request, "request")
   end
 
   def test_write_request_with_controls
     mock = Minitest::Mock.new
     mock.expect(:write, true, [[1.to_ber, "request", "controls"].to_ber_sequence])
     conn = Net::LDAP::Connection.new(:socket => mock)
-    conn.write_request("request", "controls")
+    conn.send(:write_request, "request", "controls")
   end
 
   def test_write_request_increments_msgid
     mock = Minitest::Mock.new
     mock.expect(:write, true, [[1.to_ber, "request1"].to_ber_sequence])
     mock.expect(:write, true, [[2.to_ber, "request2"].to_ber_sequence])
     conn = Net::LDAP::Connection.new(:socket => mock)
-    conn.write_request("request1")
-    conn.write_request("request2")
+    conn.send(:write_request, "request1")
+    conn.send(:write_request, "request2")
   end
 end