Add the given value to the items list when a ComboBox is editable

library/cwm/src/lib/cwm/common_widgets.rb

@@ -184,6 +184,14 @@ class ComboBox < AbstractWidget
     include ValueBasedWidget
     include ItemsSelection
     abstract_method :label
+
+    alias_method :orig_value=, :value=
+    def value=(val)
+      if opt.include?(:editable) && !items.map(&:first).include?(val)
+        change_items([[val, val]] + items)
+      end
+      self.orig_value = val
+    end
   end
 
   # Widget representing selection box to select value.

library/cwm/test/common_widgets_test.rb

@@ -110,3 +110,30 @@ def hspacing
     end
   end
 end
+
+describe CWM::ComboBox do
+  class MountPointSelector < CWM::ComboBox
+    def label
+      ""
+    end
+
+    def opt
+      [:editable]
+    end
+
+    def items
+      [["/", "/ (root)"]]
+    end
+  end
+
+  subject { MountPointSelector.new }
+
+  describe "#value=" do
+    describe "when the widget is editable" do
+      it "adds the given value to the list of items" do
+        expect(subject).to receive(:change_items).with([["/srv", "/srv"], ["/", "/ (root)"]])
+        subject.value = "/srv"
+      end
+    end
+  end
+end