update unittests:

add test for disabled choices getter

src/scripts/choices.test.ts

@@ -2176,6 +2176,7 @@ describe('choices', () => {
 
     describe('_onKeyDown', () => {
       let activeItems;
+      let disabledChoices;
       let hasItems;
       let hasActiveDropdown;
       let hasFocussedInput;
@@ -2188,7 +2189,7 @@ describe('choices', () => {
         instance._onDirectionKey = stub();
         instance._onDeleteKey = stub();
 
-        ({ activeItems } = instance._store);
+        ({ activeItems, disabledChoices } = instance._store);
         hasItems = instance.itemList.hasChildren();
         hasActiveDropdown = instance.dropdown.isActive;
         hasFocussedInput = instance.input.isFocussed;
@@ -2212,6 +2213,8 @@ describe('choices', () => {
 
             expect(instance._onDirectionKey).to.have.been.calledWith(
               event,
+              activeItems,
+              disabledChoices,
               hasActiveDropdown,
             );
           });
@@ -2244,6 +2247,7 @@ describe('choices', () => {
           expect(instance._onEnterKey).to.have.been.calledWith(
             event,
             activeItems,
+            disabledChoices,
             hasActiveDropdown,
           );
         });

src/scripts/store/store.test.ts

@@ -191,6 +191,15 @@ describe('reducers/store', () => {
       });
     });
 
+    describe('disabledChoices getter', () => {
+      it('returns choices that are disabled', () => {
+        const expectedResponse = state.choices.filter(
+          choice => choice.disabled,
+        );
+        expect(instance.disabledChoices).to.eql(expectedResponse);
+      });
+    });
+
     describe('selectableChoices getter', () => {
       it('returns choices that are not disabled', () => {
         const expectedResponse = state.choices.filter(