test: added test cases of navigation bar (#487) (#489)

* test: added test cases of navigation bar

* test: added test case for navigation bar api

---------

Co-authored-by: ayesha waris <73840786+ayeshoali@users.noreply.github.com>
Co-authored-by: sundasnoreen12 <sundasnoreen12@ggmail.com>

src/components/NavigationBar/data/api.js

@@ -4,6 +4,8 @@ import { getAuthenticatedHttpClient } from '@edx/frontend-platform/auth';
 
 import { getApiBaseUrl } from '../../../data/constants';
 
+export const getCourseMetadataApiUrl = (courseId) => `${getApiBaseUrl()}/api/course_home/course_metadata/${courseId}`;
+
 function normalizeCourseHomeCourseMetadata(metadata, rootSlug) {
   const data = camelCaseObject(metadata);
   return {
@@ -21,7 +23,7 @@ function normalizeCourseHomeCourseMetadata(metadata, rootSlug) {
 }
 
 export async function getCourseHomeCourseMetadata(courseId, rootSlug) {
-  const url = `${getApiBaseUrl()}/api/course_home/course_metadata/${courseId}`;
+  const url = getCourseMetadataApiUrl(courseId);
   // don't know the context of adding timezone in url. hence omitting it
   // url = appendBrowserTimezoneToUrl(url);
   const { data } = await getAuthenticatedHttpClient().get(url);