public void GetByCourseIdReturnsAllCoursesWithTheGivenId()
{
var courseId = "test";
BaseServiceTests.Initialize();
var countWithId = this.dbFixture.dbContext.Assignments
.Where(a => a.IsDeleted == false && a.Lecturecise.CourseId == courseId).Count();
var repository = new DbRepository <Assignment>(this.dbFixture.dbContext);
var service = new AssignmentService(repository);
Assert.Equal(countWithId, service.GetByCourseId(courseId).Count());
}