[#10920] Add testing for sortCoursesBy method in instructor home page.

src/web/app/pages-instructor/instructor-home-page/instructor-home-page.component.spec.ts

@@ -52,6 +52,15 @@ const testCourse2: Course = {
   timeZone: 'Asia/Singapore',
 };
 
+const testCourse3: Course = {
+  courseId: 'CS0234',
+  courseName: 'Data Structures',
+  institute: 'Test Institute',
+  creationTimestamp: 1676841600000, // Sunday, 21 May 2023 08:00:00  GMT+08:00
+  deletionTimestamp: 0,
+  timeZone: 'Asia/Singapore',
+};
+
 const testFeedbackSession1: FeedbackSession = {
   feedbackSessionName: 'First Session',
   courseId: 'CS1231',
@@ -271,6 +280,27 @@ describe('InstructorHomePageComponent', () => {
             .feedbackSession.feedbackSessionName).toEqual('First Session');
   });
 
+  it('should sort courseTabModels by courseId in ascending order', () => {
+    const activeCourses: CourseTabModel[] = activeCourseTabModels;
+    activeCourses.push({
+      course: testCourse3,
+      instructorPrivilege: testInstructorPrivilege,
+      sessionsTableRowModels: [],
+      sessionsTableRowModelsSortBy: SortBy.NONE,
+      sessionsTableRowModelsSortOrder: SortOrder.ASC,
+
+      hasPopulated: false,
+      isAjaxSuccess: true,
+      isTabExpanded: true,
+      hasLoadingFailed: false,
+    });
+
+    component.courseTabModels = activeCourses;
+    component.sortCoursesBy(SortBy.COURSE_ID);
+    expect(component.courseTabModels[0].course.courseId).toEqual('CS0234');
+    expect(component.courseTabModels[0].course.courseName).toEqual('Data Structures');
+  });
+
   it('should snap with default fields', () => {
     expect(fixture).toMatchSnapshot();
   });