fix: revert fix

Author: ihor-romaniuk

src/course-unit/CourseUnit.test.jsx

@@ -471,10 +471,6 @@ describe('<CourseUnit />', () => {
       id: courseVerticalChildrenMock.children[0].block_id,
     });
 
-    axiosMock
-      .onGet(getCourseUnitApiUrl(blockId))
-      .reply(200, courseUnitIndexMock);
-
     axiosMock
       .onPost(postXBlockBaseApiUrl({
         parent_locator: blockId,
@@ -2176,10 +2172,6 @@ describe('<CourseUnit />', () => {
         ? { ...child, block_type: 'html' }
         : child));
 
-    axiosMock
-      .onGet(getCourseUnitApiUrl(blockId))
-      .reply(200, courseUnitIndexMock);
-
     axiosMock
       .onPost(postXBlockBaseApiUrl({
         parent_locator: blockId,

src/course-unit/sidebar/utils.js

@@ -99,4 +99,4 @@ export const getIconVariant = (visibilityState, published, hasChanges) => {
  * @param {string} id - The course unit ID.
  * @returns {string} The clear course unit ID extracted from the provided data.
  */
-export const extractCourseUnitId = (id) => id.match(/block@(.+)$/)[1];
+export const extractCourseUnitId = (id = '') => id.match(/block@(.+)$/)?.[1];