InterfaceConfigBuilder#name= sets the interface too if it exists

src/lib/y2network/interface_config_builder.rb

@@ -54,13 +54,15 @@ def self.for(type, config: nil)
     end
 
     # @return [String] Device name (eth0, wlan0, etc.)
-    attr_accessor :name
+    attr_reader :name
     # @return [Y2Network::InterfaceType] type of @see Y2Network::Interface which is intended to be build
     attr_accessor :type
     # @return [Y2Network::ConnectionConfig] connection config on which builder operates
     attr_reader :connection_config
-    # @return [Symbol,nil] Mechanism to rename the interface (no hardware based, :mac or :bus_id)
+    # @return [Symbol] Mechanism to rename the interface (:none -no hardware based-, :mac or :bus_id)
     attr_writer :renaming_mechanism
+    # @return [Y2Network::Interface,nil] Underlying interface if it exists
+    attr_reader :interface
 
     # Constructor
     #
@@ -81,6 +83,17 @@ def initialize(type:, config: nil)
       end
     end
 
+    # Sets the interface name
+    #
+    # It initializes the interface using the given name if it exists
+    #
+    # @param value [String] Interface name
+    def name=(value)
+      @name = value
+      iface = find_interface
+      self.interface = iface if iface
+    end
+
     def newly_added?
       @newly_added
     end
@@ -126,7 +139,7 @@ def renamed_interface?
     # @param new_name [String] New interface's name
     def rename_interface(new_name)
       @old_name ||= name
-      self.name = new_name
+      @name = new_name
     end
 
     # Returns the current renaming mechanism
@@ -136,15 +149,6 @@ def renaming_mechanism
       @renaming_mechanism || interface.renaming_mechanism
     end
 
-    # Returns the underlying interface
-    #
-    # If the interface has been renamed, take the old name into account.
-    #
-    # @return [Y2Network::Interface,nil]
-    def interface
-      @interface ||= yast_config.interfaces.by_name(@old_name || name)
-    end
-
     # how many device names is proposed
     NEW_DEVICES_COUNT = 10
     # Proposes bunch of possible names for interface
@@ -414,6 +418,22 @@ def save_aliases_to_connection
       end
     end
 
+    # Sets the interface for the builder
+    #
+    # @param iface [Interface] Interface to associate the builder with
+    def interface=(iface)
+      @interface = iface
+      @renaming_mechanism ||= @interface.renaming_mechanism
+    end
+
+    # Returns the underlying interface
+    #
+    # @return [Y2Network::Interface,nil]
+    def find_interface
+      return nil unless yast_config # in some tests, it could return nil
+      yast_config.interfaces.by_name(name)
+    end
+
     # Helper method to access to the current configuration
     #
     # @return [Y2Network::Config]

test/y2network/interface_config_builder_test.rb

@@ -112,10 +112,20 @@
   end
 
   describe "#renamed_interface?" do
-    context "when the interface has been renamed" do
+    context "when the interface name has not been changed" do
       it "returns false" do
         expect(config_builder.renamed_interface?).to eq(false)
       end
+
+      context "but it was initially renamed by udev" do
+        before do
+          allow(eth0).to receive(:renaming_mechanism).and_return(:mac)
+        end
+
+        it "returns false" do
+          expect(config_builder.renamed_interface?).to eq(false)
+        end
+      end
     end
 
     context "when the interface has been renamed" do