message: Added active flags to existing test cases
  Notifications will only be generated if a course is active and changedUnit is visible
diff: @@ -43,6 +43,7 @@ describe('Notifications', async () => {
  it('should create notifications for students with the corresponding settings', async () => {
  const course = await FixtureUtils.getRandomCourse();
  + course.active = true;
  const teacher = await FixtureUtils.getRandomTeacherForCourse(course);
  const newNotification = {
  @@ -98,6 +99,7 @@ describe('Notifications', async () => {
  it('should create notifications for student with changedCourse and text', async () => {
  const course = await FixtureUtils.getRandomCourse();
  + course.active = true;
  const student = course.students[Math.floor(Math.random() * course.students.length)];
  const teacher = await FixtureUtils.getRandomTeacherForCourse(course);
  @@ -119,6 +121,7 @@ describe('Notifications', async () => {
  it('should create notifications for student with changedCourse and text', async () => {
  const course = await FixtureUtils.getRandomCourse();
  + course.active = true;
  const student = course.students[Math.floor(Math.random() * course.students.length)];
  const teacher = await FixtureUtils.getRandomTeacherForCourse(course);
  @@ -147,9 +150,12 @@ describe('Notifications', async () => {
  it('should create notifications for student with changedCourse, changedLecture, changedUnit and text', async () => {
  const course = await FixtureUtils.getRandomCourse();
  + course.active = true;
  const lecture = await FixtureUtils.getRandomLectureFromCourse(course);
  const student = course.students[Math.floor(Math.random() * course.students.length)];
  const teacher = await FixtureUtils.getRandomTeacherForCourse(course);
  + const unit = lecture.units.pop();
  + unit.visible = true;
  const newNotification = {
  changedCourse: course,
  @@ -171,6 +177,7 @@ describe('Notifications', async () => {
  it('should create notifications for student with changedCourse and text but API_NOTIFICATION_TYPE_NONE', async () => {
  const course = await FixtureUtils.getRandomCourse();
  + course.active = true;
  const student = course.students[Math.floor(Math.random() * course.students.length)];
  const teacher = await FixtureUtils.getRandomTeacherForCourse(course);
  