public void CanAddNewCourse()
{
var dummyCourse = DummyDataGenerator.CreateDummyCourse();
// Course Id's are autogenerated by the database, so when we
// add a new one to the db, we cache the assigned Id after the
// add operation has completed (that way we can retrieve the course
// from the db to run our assertions on the data
ICoursesModel model = new CoursesModel();
dummyCourse.Id = model.AddOrUpdateCourse(dummyCourse).Id;
// Retrieve the newly added course back out from the Db
var repo = new BizCollegeRepository<Course, string>();
var fromDb = repo.Get(dummyCourse.Id);
// Check the values against our dummy course
Assert.NotNull(fromDb);
Assert.AreEqual(dummyCourse.Id, fromDb.Id);
Assert.AreEqual(dummyCourse.Name, fromDb.Name);
Assert.AreEqual(dummyCourse.Description, fromDb.Description);
Assert.AreEqual(dummyCourse.CreatedByUsername, fromDb.CreatedByUsername);
Assert.AreEqual(dummyCourse.LastUpdateByUsername, fromDb.LastUpdateByUsername);
Assert.AreEqual(dummyCourse.CourseSlides.Count, fromDb.CourseSlides.Count);
// clean-up db
repo.Remove(fromDb.Id);
}
/// <summary>
/// Given a Course.Id and a student's username, enroll the student in that course. If
/// a student record doesn't exist (e.g. the student was never enrolled in a course),
/// a record is created internally and the course is added to the StudentRecord.StudentCourseEnrollments.
/// If the student already has a record, we udpate the student's enrollments with the new course
/// enrollment.
/// </summary>
/// <param name="username">The username is how we uniquely track/identify a StudentRecord</param>
/// <param name="courseId">The Course.Id (unique id of the course)</param>
/// <exception cref="System.InvalidOperationException">
/// <para>
/// 1) If the given course (by Course.Id) does not exist in the system
/// 2) If the student is already enrolled in that course
/// </para>
/// </exception>
/// <returns>A copy of the persisted/updated StudentRecord</returns>
public StudentRecord AddEnrollment(string username, string courseId)
{
IRepository<Course, string> coursesRepo = new BizCollegeRepository<Course, string>();
var course = coursesRepo.Get(courseId);
if (course == null)
throw new InvalidOperationException("That course does not exist in the system");
// Try and retrive the student's record (by username). If they don't
// have an existing record, create a record for them
var student = m_enrollmentsRepo.Get(username);
if (student == null)
{
student = new StudentRecord() { Username = username, StudentCourseEnrollments = new List<Enrollment>() };
}
// Throw an error if the student is already enrolled in this course
foreach (var currentEnrollment in student.StudentCourseEnrollments)
{
if (currentEnrollment.CourseId == courseId)
{
throw new InvalidOperationException("The student is already enrolled in course: " + courseId);
}
}
// Add the new enrollment and save it the updated student record
student.StudentCourseEnrollments.Add(new Enrollment()
{
CourseId = courseId,
DateStarted = DateTime.Now,
DateCompleted = SqlServerHelper.GetSqlServerMinimumDateTimeValue()
});
return m_enrollmentsRepo.AddOrUpdate(student);
}
public void CanUpdateExistingCourse()
{
// Create a dummy course and add it to the database
var dummyCourse = DummyDataGenerator.CreateDummyCourse();
ICoursesModel model = new CoursesModel();
dummyCourse.Id = model.AddOrUpdateCourse(dummyCourse).Id;
// Update the course by adding a course slide and changing
dummyCourse.CourseSlides.Add(new CourseContent()
{
CourseContentType = ContentType.Video,
Description = "This video talks about how to start your own business",
ResourcePath = "http://www.youtube.com",
Title = "Business Course Introduction Video",
IndexInSquence = 0,
});
// Also update the other properties of the coures
dummyCourse.Name = "Business Savvy 101";
dummyCourse.Description = "Tips on how to run a business properly";
dummyCourse.State = CourseState.Active;
dummyCourse.LastUpdateByUsername = "******";
dummyCourse.CreatedByUsername = "******";
// Persist the course udpates to the database
model.AddOrUpdateCourse(dummyCourse);
// Retrieve a copy of the updated course back out from the Db
var repo = new BizCollegeRepository<Course, string>();
var fromDb = repo.Get(dummyCourse.Id);
// Check that the course properties we updated were persisted
Assert.NotNull(fromDb);
Assert.AreEqual(dummyCourse.Id, fromDb.Id);
Assert.AreEqual(dummyCourse.Name, fromDb.Name);
Assert.AreEqual(dummyCourse.Description, fromDb.Description);
Assert.AreEqual(dummyCourse.State, fromDb.State);
Assert.AreEqual(dummyCourse.LastUpdateByUsername, fromDb.LastUpdateByUsername);
Assert.AreEqual(dummyCourse.CreatedByUsername, fromDb.CreatedByUsername);
Assert.NotNull(fromDb.CourseSlides[0]);
Assert.AreEqual(dummyCourse.CourseSlides.Count, fromDb.CourseSlides.Count);
Assert.AreEqual(dummyCourse.CourseSlides[0].CourseContentType, fromDb.CourseSlides[0].CourseContentType);
Assert.AreEqual(dummyCourse.CourseSlides[0].Description, fromDb.CourseSlides[0].Description);
Assert.AreEqual(dummyCourse.CourseSlides[0].ResourcePath, fromDb.CourseSlides[0].ResourcePath);
Assert.AreEqual(dummyCourse.CourseSlides[0].Title, fromDb.CourseSlides[0].Title);
Assert.AreEqual(dummyCourse.CourseSlides[0].IndexInSquence, fromDb.CourseSlides[0].IndexInSquence);
// clean-up db
repo.Remove(fromDb.Id);
}
public void CanRemoveExistingCourse()
{
var dummyCourse = DummyDataGenerator.CreateDummyCourse();
ICoursesModel model = new CoursesModel();
dummyCourse.Id = model.AddOrUpdateCourse(dummyCourse).Id;
// Remove the dummyCourse
model.RemoveCourse(dummyCourse.Id);
// Check that the course was removed from the Db
var repo = new BizCollegeRepository<Course, string>();
var fromDb = repo.Get(dummyCourse.Id);
Assert.IsNull(fromDb);
}
public void CanRemoveStudentEnrollment()
{
// dummy username and course id
string username = "******";
string courseId = Guid.NewGuid().ToString();
// Add the dummy student enrollment via the internal repository interfaces
var dummyEnrollment = new StudentRecord() { Username = username };
dummyEnrollment.StudentCourseEnrollments = new List<Enrollment>();
dummyEnrollment.StudentCourseEnrollments.Add(
new Enrollment()
{
CourseId = courseId,
DateStarted = DateTime.Now,
DateCompleted = SqlServerHelper.GetSqlServerMinimumDateTimeValue()
}
);
var enrollmentsRepo = new BizCollegeRepository<StudentRecord, string>();
dummyEnrollment = enrollmentsRepo.AddOrUpdate(dummyEnrollment);
// Remove the enrollment via the enrollmnent model interface that the webapp
// will use to remove a student's enrollment from their record
IStudentEnrollmentsModel enrollmentsModel = new StudentEnrollmentsModel();
enrollmentsModel.RemoveEnrollment(username, courseId);
// retrieve the enrollment record from the Db and ensure the student has
// no enrollments in his/her student record
var fromDb = enrollmentsRepo.Get(username);
Assert.NotNull(fromDb);
Assert.AreEqual(fromDb.Username, username);
Assert.AreEqual(fromDb.StudentCourseEnrollments.Count, 0);
// clean up Db
enrollmentsRepo.Remove(fromDb.Username);
}
public void CanSetStudentEnrollmentCourseCompletion()
{
string username = "******";
// Create a dummy course and add it to the database
var dummyCourse = DummyDataGenerator.CreateDummyCourse();
ICoursesModel courseModel = new CoursesModel();
dummyCourse.Id = courseModel.AddOrUpdateCourse(dummyCourse).Id;
// add the new enrollment for the given user and specified course
IStudentEnrollmentsModel model = new StudentEnrollmentsModel();
StudentRecord studentEnrollmentRecord = model.AddEnrollment(username, dummyCourse.Id);
// set the course as completed
model.SetStudentCourseCompletion(username, dummyCourse.Id);
// retrieve the record from the database and make sure that course
// was set to complete.
var enrollmentsRepo = new BizCollegeRepository<StudentRecord, string>();
var fromDb = enrollmentsRepo.Get(studentEnrollmentRecord.Username);
Assert.NotNull(fromDb);
Assert.IsTrue(fromDb.StudentCourseEnrollments[0].WasCourseCompleted);
// clean up Db: remove student record
enrollmentsRepo.Remove(studentEnrollmentRecord.Username);
// clean up Db: remove dummy course
var coursesRepo = new BizCollegeRepository<Course, string>();
coursesRepo.Remove(dummyCourse.Id);
}
