add test

apps/app/test/integration/service/v5.public-page.test.ts

@@ -491,6 +491,7 @@ describe('PageService page operations with only public pages', () => {
     const pageIdForDuplicate13 = new mongoose.Types.ObjectId();
     const pageIdForDuplicate14 = new mongoose.Types.ObjectId();
     const pageIdForDuplicate15 = new mongoose.Types.ObjectId();
+    const pageIdForDuplicate16 = new mongoose.Types.ObjectId();
 
     // revision ids
     const revisionIdForDuplicate1 = new mongoose.Types.ObjectId();
@@ -627,6 +628,13 @@ describe('PageService page operations with only public pages', () => {
         parent: pageIdForDuplicate14,
         revision: revisionIdForDuplicate12,
       },
+      {
+        _id: pageIdForDuplicate16,
+        path: '/v5_PageForDuplicate16',
+        grant: Page.GRANT_PUBLIC,
+        parent: rootPage._id,
+        isEmpty: true,
+      },
     ]);
 
     await Revision.insertMany([
@@ -1735,6 +1743,24 @@ describe('PageService page operations with only public pages', () => {
       expect(isThrown).toBe(true);
     });
 
+    test('Should duplicate to the path that exists as an empty page', async() => {
+      const page = await Page.findOne({ path: '/v5_PageForDuplicate1' });
+      expect(page).toBeTruthy();
+
+      const newPagePath = '/v5_PageForDuplicate16';
+      const duplicatedPage = await duplicate(page, newPagePath, dummyUser1, false);
+
+      const duplicatedRevision = await Revision.findOne({ pageId: duplicatedPage._id });
+      const baseRevision = await Revision.findOne({ pageId: page._id });
+
+      // new path
+      expect(xssSpy).toHaveBeenCalled();
+      expect(duplicatedPage.path).toBe(newPagePath);
+      expect(duplicatedPage._id).not.toStrictEqual(page._id);
+      expect(duplicatedPage.revision).toStrictEqual(duplicatedRevision._id);
+      expect(duplicatedRevision.body).toEqual(baseRevision.body);
+    });
+
     test('Should duplicate multiple pages', async() => {
       const basePage = await Page.findOne({ path: '/v5_PageForDuplicate3' });
       const revision = await Revision.findOne({ pageId: basePage._id });