public async Task Can_enroll_and_drop_a_student()
{
// Arrange
var student = await CreateAndSaveTestStudent();
var course = await CreateAndSaveTestCourse();
var repository = new CourseRepository(_db);
// Act
await repository.AddStudent(course.Id, student.Id);
// Assert
var actualCourse = await repository.GetOne(course.Id);
Assert.Contains(actualCourse.Enrollments, e => e.StudentId == student.Id);
// Act
await repository.RemoveStudentFromCourse(course.Id, student.Id);
// Assert
actualCourse = await repository.GetOne(course.Id);
Assert.DoesNotContain(actualCourse.Enrollments, e => e.StudentId == student.Id);
}
