public void GetCoursesByStudentId_ValidGuid_GetsOneCourse()
        {
            var testRepo      = new MockRepository <CourseEntity>();
            var testStudentId = Guid.NewGuid();
            var testCourseOne = CourseFactory.Create_CourseEntity_ValidMinimum_CustomStudentId(testStudentId);
            var testCourseTwo = CourseFactory.Create_CourseEntity_ValidMinimum_CustomStudentId(Guid.NewGuid());

            testRepo.Create(testCourseOne);
            testRepo.Create(testCourseTwo);

            var testClass = InteractorFactory.Create_CourseInteractor(testRepo);

            var result = testClass.GetCoursesByStudentId(testStudentId);

            result.Count.ShouldBe(1);
        }