Add default next handler to CWM::Dialog

library/cwm/src/lib/cwm/dialog.rb

@@ -76,6 +76,15 @@ def disable_buttons
       []
     end
 
+    # Handler when the next button is used
+    #
+    # If returns false, then it does not go next.
+    #
+    # @return [Boolean]
+    def next_handler
+      true
+    end
+
     # Handler when the back button is used
     #
     # If returns false, then it does not go back.
@@ -116,6 +125,7 @@ def cwm_show
         next_button:     next_button,
         skip_store_for:  skip_store_for,
         disable_buttons: disable_buttons,
+        next_handler:    proc { next_handler },
         back_handler:    proc { back_handler },
         abort_handler:   proc { abort_handler }
       )

library/cwm/test/dialog_test.rb

@@ -39,6 +39,16 @@ def contents
       expect(subject.class.run).to eq(:launch)
     end
 
+    it "passes the next handler to CWM#show" do
+      expect(Yast::CWM).to receive(:show) do |_content, options|
+        expect(options).to include(:next_handler)
+        # Checking the default handler is passed (simply returns true)
+        expect(options[:next_handler].call).to eq(true)
+      end
+
+      subject.class.run
+    end
+
     it "passes the back handler to CWM#show" do
       expect(Yast::CWM).to receive(:show) do |_content, options|
         expect(options).to include(:back_handler)