fix: null error at useRouteMatch when running on tutor

src/data/constants.js

@@ -1,6 +1,9 @@
 import { getConfig } from '@edx/frontend-platform';
 
 export const getApiBaseUrl = () => getConfig().LMS_BASE_URL;
+export const getFullUrl = (path) => (
+  new URL(`${getConfig().PUBLIC_PATH.replace(/\/$/, '')}/${path}`, window.location.origin).href
+);
 
 /**
  * Enum for thread types.
@@ -137,7 +140,7 @@ export const DiscussionProvider = {
   OPEN_EDX: 'openedx',
 };
 
-const BASE_PATH = `${getConfig().PUBLIC_PATH}:courseId`;
+const BASE_PATH = '/:courseId';
 
 export const Routes = {
   DISCUSSIONS: {

src/discussions/post-comments/PostCommentsView.test.jsx

@@ -442,6 +442,20 @@ describe('ThreadView', () => {
       assertLastUpdateData({ pinned: false });
     });
 
+    it('should allow copying a link to the post', async () => {
+      await waitFor(() => renderComponent(discussionPostId));
+      const post = await screen.findByTestId('post-thread-1');
+      const hoverCard = within(post).getByTestId('hover-card-thread-1');
+      Object.assign(navigator, { clipboard: { writeText: jest.fn() } });
+      await act(async () => {
+        fireEvent.click(within(hoverCard).getByRole('button', { name: /actions menu/i }));
+      });
+      await act(async () => {
+        fireEvent.click(within(hoverCard).getByRole('button', { name: /copy link/i }));
+      });
+      expect(navigator.clipboard.writeText).toHaveBeenCalledWith(`http://localhost/${courseId}/posts/${discussionPostId}`);
+    });
+
     it('should allow reporting the post', async () => {
       await waitFor(() => renderComponent(discussionPostId));
       const post = await screen.findByTestId('post-thread-1');

src/discussions/posts/data/__factories__/threads.factory.js

@@ -26,6 +26,7 @@ Factory.define('thread')
       'type',
       'voted',
       'pinned',
+      'copy_link',
     ],
     author: 'test_user',
     author_label: 'Staff',

src/discussions/posts/post/Post.jsx

@@ -11,7 +11,7 @@ import { useIntl } from '@edx/frontend-platform/i18n';
 import { Hyperlink, useToggle } from '@edx/paragon';
 
 import HTMLLoader from '../../../components/HTMLLoader';
-import { ContentActions } from '../../../data/constants';
+import { ContentActions, getFullUrl } from '../../../data/constants';
 import { selectorForUnitSubsection, selectTopicContext } from '../../../data/selectors';
 import { AlertBanner, Confirmation } from '../../common';
 import { DiscussionContext } from '../../common/context';
@@ -37,7 +37,7 @@ const Post = ({ handleAddResponseButton }) => {
   const location = useLocation();
   const history = useHistory();
   const dispatch = useDispatch();
-  const courseId = useSelector((state) => state.config.id);
+  const { courseId } = useContext(DiscussionContext);
   const topic = useSelector(selectTopic(topicId));
   const getTopicSubsection = useSelector(selectorForUnitSubsection);
   const topicContext = useSelector(selectTopicContext(topicId));
@@ -75,8 +75,7 @@ const Post = ({ handleAddResponseButton }) => {
   }, [closed, postId, showClosePostModal]);
 
   const handlePostCopyLink = useCallback(() => {
-    const postURL = new URL(`${getConfig().PUBLIC_PATH}${courseId}/posts/${postId}`, window.location.origin);
-    navigator.clipboard.writeText(postURL.href);
+    navigator.clipboard.writeText(getFullUrl(`${courseId}/posts/${postId}`));
   }, [window.location.origin, postId, courseId]);
 
   const handlePostPin = useCallback(() => dispatch(