test: add unit test for resetting XBlock publish state after saving changes

Author: bra-i-am

src/course-unit/CourseUnit.test.jsx

@@ -2359,4 +2359,39 @@ describe('<CourseUnit />', () => {
       ).not.toBeInTheDocument();
     });
   });
+
+it('resets XBlock publish state after saving XBlock changes', async () => {
+  store = initializeStore();
+  mockedUsedNavigate.mockClear();
+  
+  axiosMock
+    .onGet(getCourseSectionVerticalApiUrl(blockId))
+    .reply(200, {
+      ...courseSectionVerticalMock,
+      xblock_info: {
+        ...courseSectionVerticalMock.xblock_info,
+        published: true, // Must have been published before
+        has_changes: true, // And now have changes
+      },
+    });
+  
+  render(<RootWrapper />);
+  
+  const xblocksIframe = await screen.findByTitle(xblockContainerIframeMessages.xblockIframeTitle.defaultMessage);
+  expect(xblocksIframe).toBeInTheDocument();
+  
+  const courseUnitSidebar = await screen.findByTestId('course-unit-sidebar');
+  
+  await waitFor(() => {
+    // Verify the publish button is present (indicates unpublished changes)
+    expect(within(courseUnitSidebar)
+      .getByRole('button', { name: sidebarMessages.actionButtonPublishTitle.defaultMessage })
+    ).toBeInTheDocument();
+    
+    // Verify discard changes button is present (confirms unpublished changes)
+    expect(within(courseUnitSidebar)
+      .getByRole('button', { name: sidebarMessages.actionButtonDiscardChangesTitle.defaultMessage })
+    ).toBeInTheDocument();
+  });
+});
 });