add forgotten methods for modified flag

library/general/src/lib/installation/auto_client.rb

@@ -41,6 +41,10 @@ def run
         packages
       when "Read"
         read
+      when "GetModified"
+        modified?
+      when "SetModified"
+        modified
       else
         raise "Invalid action for auto client '#{func.inspect}'"
       end
@@ -101,5 +105,16 @@ def packages
     def read
       raise NotImplementedError, "Calling abstract method 'write'"
     end
+
+    # Abstract method to set flag for configuration that it is modified by autoyast.
+    def modified
+      raise NotImplementedError, "Calling abstract method 'modified'"
+    end
+
+    # Abstract method to query if configuration is modified and should be written.
+    def modified?
+      raise NotImplementedError, "Calling abstract method 'modified?'"
+    end
+
   end
 end

library/general/test/auto_client_test.rb

@@ -9,7 +9,7 @@ def import(args)
     args.empty? ? "import" : args
   end
 
-  ["export", "summary", "reset", "change", "write", "packages", "read"].each do |m|
+  ["export", "summary", "reset", "change", "write", "packages", "read", "modified?", "modified"].each do |m|
     define_method(m.to_sym) { m }
   end
 end
@@ -127,6 +127,34 @@ def import(args)
       end
     end
 
+    context "first client argument is GetModified" do
+      before do
+        allow(Yast::WFM).to receive(:Args).and_return(["GetModified", {}])
+      end
+
+      it "dispatch call to abstract method modified?" do
+        expect(subject.run).to eq "modified?"
+      end
+
+      it "raise NotImplementedError exception if abstract method not defined" do
+        expect{::Installation::AutoClient.run}.to raise_error(NotImplementedError)
+      end
+    end
+
+    context "first client argument is SetModified" do
+      before do
+        allow(Yast::WFM).to receive(:Args).and_return(["SetModified", {}])
+      end
+
+      it "dispatch call to abstract method modified" do
+        expect(subject.run).to eq "modified"
+      end
+
+      it "raise NotImplementedError exception if abstract method not defined" do
+        expect{::Installation::AutoClient.run}.to raise_error(NotImplementedError)
+      end
+    end
+
     context "first client argument is Packages" do
       before do
         allow(Yast::WFM).to receive(:Args).and_return(["Packages", {}])