public void testGetCourseSummaryWithoutStats() throws Exception {

    ______TS("typical case");

    CourseAttributes course = dataBundle.courses.get("typicalCourse1");
    CourseSummaryBundle courseSummary = coursesLogic.getCourseSummaryWithoutStats(course.id);
    assertEquals(course.id, courseSummary.course.id);
    assertEquals(course.name, courseSummary.course.name);
    assertEquals(false, courseSummary.course.isArchived);

    assertEquals(0, courseSummary.evaluations.size());
    assertEquals(0, courseSummary.sections.size());

    ______TS("course without students");

    StudentProfileAttributes spa = new StudentProfileAttributes();
    spa.googleId = "instructor1";

    AccountsLogic.inst()
        .createAccount(
            new AccountAttributes(
                "instructor1",
                "Instructor 1",
                true,
                "*****@*****.**",
                "TEAMMATES Test Institute 1",
                spa));
    coursesLogic.createCourseAndInstructor("instructor1", "course1", "course 1");
    courseSummary = coursesLogic.getCourseSummaryWithoutStats("course1");
    assertEquals("course1", courseSummary.course.id);
    assertEquals("course 1", courseSummary.course.name);

    assertEquals(0, courseSummary.evaluations.size());
    assertEquals(0, courseSummary.sections.size());

    coursesLogic.deleteCourseCascade("course1");
    accountsDb.deleteAccount("instructor1");

    ______TS("non-existent");

    try {
      coursesLogic.getCourseSummaryWithoutStats("non-existent-course");
      signalFailureToDetectException();
    } catch (EntityDoesNotExistException e) {
      AssertHelper.assertContains("The course does not exist:", e.getMessage());
    }

    ______TS("null parameter");

    try {
      coursesLogic.getCourseSummaryWithoutStats(null);
      signalFailureToDetectException();
    } catch (AssertionError e) {
      assertEquals("Supplied parameter was null\n", e.getMessage());
    }
  }
  public void testGetTeamsForCourse() throws Exception {

    ______TS("typical case");

    CourseAttributes course = dataBundle.courses.get("typicalCourse1");
    List<TeamDetailsBundle> teams = coursesLogic.getTeamsForCourse(course.id);

    assertEquals(2, teams.size());
    assertEquals("Team 1.1", teams.get(0).name);
    assertEquals("Team 1.2", teams.get(1).name);

    ______TS("course without students");

    StudentProfileAttributes spa = new StudentProfileAttributes();
    spa.googleId = "instructor1";

    AccountsLogic.inst()
        .createAccount(
            new AccountAttributes(
                "instructor1",
                "Instructor 1",
                true,
                "*****@*****.**",
                "TEAMMATES Test Institute 1",
                spa));
    coursesLogic.createCourseAndInstructor("instructor1", "course1", "course 1");
    teams = coursesLogic.getTeamsForCourse("course1");

    assertEquals(0, teams.size());

    coursesLogic.deleteCourseCascade("course1");
    accountsDb.deleteAccount("instructor1");

    ______TS("non-existent");

    try {
      coursesLogic.getTeamsForCourse("non-existent-course");
      signalFailureToDetectException();
    } catch (EntityDoesNotExistException e) {
      AssertHelper.assertContains("does not exist", e.getMessage());
    }

    ______TS("null parameter");

    try {
      coursesLogic.getTeamsForCourse(null);
      signalFailureToDetectException();
    } catch (AssertionError e) {
      assertEquals("Supplied parameter was null\n", e.getMessage());
    }
  }
  public void testCreateCourseAndInstructor() throws Exception {

    /* Explanation: SUT has 5 paths. They are,
     * path 1 - exit because the account doesn't' exist.
     * path 2 - exit because the account exists but doesn't have instructor privileges.
     * path 3 - exit because course creation failed.
     * path 4 - exit because instructor creation failed.
     * path 5 - success.
     * Accordingly, we have 5 test cases.
     */

    ______TS("fails: account doesn't exist");

    CourseAttributes c = new CourseAttributes();
    c.id = "fresh-course-tccai";
    c.name = "Fresh course for tccai";

    @SuppressWarnings("deprecation")
    InstructorAttributes i =
        new InstructorAttributes(
            "instructor-for-tccai", c.id, "Instructor for tccai", "*****@*****.**");

    try {
      coursesLogic.createCourseAndInstructor(i.googleId, c.id, c.name);
      signalFailureToDetectException();
    } catch (AssertionError e) {
      AssertHelper.assertContains("for a non-existent instructor", e.getMessage());
    }
    TestHelper.verifyAbsentInDatastore(c);
    TestHelper.verifyAbsentInDatastore(i);

    ______TS("fails: account doesn't have instructor privileges");

    AccountAttributes a = new AccountAttributes();
    a.googleId = i.googleId;
    a.name = i.name;
    a.email = i.email;
    a.institute = "TEAMMATES Test Institute 5";
    a.isInstructor = false;
    a.studentProfile = new StudentProfileAttributes();
    a.studentProfile.googleId = i.googleId;
    accountsDb.createAccount(a);
    try {
      coursesLogic.createCourseAndInstructor(i.googleId, c.id, c.name);
      signalFailureToDetectException();
    } catch (AssertionError e) {
      AssertHelper.assertContains("doesn't have instructor privileges", e.getMessage());
    }
    TestHelper.verifyAbsentInDatastore(c);
    TestHelper.verifyAbsentInDatastore(i);

    ______TS("fails: error during course creation");

    a.isInstructor = true;
    accountsDb.updateAccount(a);

    c.id = "invalid id";

    try {
      coursesLogic.createCourseAndInstructor(i.googleId, c.id, c.name);
      signalFailureToDetectException();
    } catch (InvalidParametersException e) {
      AssertHelper.assertContains("not acceptable to TEAMMATES as a Course ID", e.getMessage());
    }
    TestHelper.verifyAbsentInDatastore(c);
    TestHelper.verifyAbsentInDatastore(i);

    ______TS("fails: error during instructor creation due to duplicate instructor");

    c.id = "fresh-course-tccai";
    instructorsDb.createEntity(i); // create a duplicate instructor

    try {
      coursesLogic.createCourseAndInstructor(i.googleId, c.id, c.name);
      signalFailureToDetectException();
    } catch (AssertionError e) {
      AssertHelper.assertContains(
          "Unexpected exception while trying to create instructor for a new course",
          e.getMessage());
    }
    TestHelper.verifyAbsentInDatastore(c);

    ______TS("fails: error during instructor creation due to invalid parameters");

    i.email = "ins.for.iccai.gmail.tmt";

    try {
      coursesLogic.createCourseAndInstructor(i.googleId, c.id, c.name);
      signalFailureToDetectException();
    } catch (AssertionError e) {
      AssertHelper.assertContains(
          "Unexpected exception while trying to create instructor for a new course",
          e.getMessage());
    }
    TestHelper.verifyAbsentInDatastore(c);

    ______TS("success: typical case");

    i.email = "*****@*****.**";

    // remove the duplicate instructor object from the datastore.
    instructorsDb.deleteInstructor(i.courseId, i.email);

    coursesLogic.createCourseAndInstructor(i.googleId, c.id, c.name);
    TestHelper.verifyPresentInDatastore(c);
    TestHelper.verifyPresentInDatastore(i);

    ______TS("Null parameter");

    try {
      coursesLogic.createCourseAndInstructor(null, c.id, c.name);
      signalFailureToDetectException();
    } catch (AssertionError e) {
      assertEquals("Supplied parameter was null\n", e.getMessage());
    }
  }