Changes based on CR

src/lib/y2network/boot_protocol.rb

@@ -43,6 +43,7 @@ def from_name(name)
 
     # @return [String] Returns protocol name
     attr_reader :name
+    alias_method :to_s, :name
 
     # Constructor
     #

src/lib/y2network/wicked/connection_config_writers/base.rb

@@ -43,12 +43,12 @@ def initialize(file)
         #
         # @param conn [Y2Network::ConnectionConfig::Base] Connection to take settings from
         def write(conn)
-          file.bootproto = value_as_string(conn.bootproto&.name)
+          file.bootproto = value_as_string(conn.bootproto.to_s)
           file.name = value_as_string(conn.description)
           file.lladdr = value_as_string(conn.lladdress)
           file.startmode = value_as_string(conn.startmode.to_s)
           file.dhclient_set_hostname = value_as_string(dhclient_set_hostname(conn))
-          file.ifplugd_priority = conn.startmode.priority if conn.startmode&.name == "ifplugd"
+          file.ifplugd_priority = conn.startmode.priority if conn.startmode.to_s == "ifplugd"
           file.ethtool_options = value_as_string(conn.ethtool_options)
           file.zone = value_as_string(conn.firewall_zone)
           file.mtu = value_as_string(conn.mtu)
@@ -83,7 +83,7 @@ def dhclient_set_hostname(conn)
         def add_ips(conn)
           file.ipaddrs.clear
           ips_to_add = conn.ip_aliases.clone
-          ips_to_add << conn.ip if static_ip?(conn)
+          ips_to_add << conn.ip if static_valid_ip?(conn)
           ips_to_add.each { |i| add_ip(i) }
         end
 
@@ -107,8 +107,14 @@ def add_hostname(conn)
           Yast::Host.Update("", conn.hostname, conn.ip.address.address.to_s)
         end
 
+
+        # Convenience method to check whether a connection is configured using 
+        # the static bootproto and a valid IP address.
+        #
         # @param conn [Y2Network::ConnectionConfig::Base] Connection to take settings from
-        def static_ip?(conn)
+        # @return [Boolean] whether the connection is configured with a valid
+        #   static IP address or not
+        def static_valid_ip?(conn)
           return false unless conn.bootproto.static?
 
           conn.ip && conn.ip.address.address.to_s != "0.0.0.0"