public async Task RemoveCourseFromStudentAsync_ShouldReturn()
{
int studentId = 1;
int courseId = 1;
var mockLogger = new Mock <IBaseLogger <EnrollmentService> >();
var mockRepository = new Mock <IEnrollmentRepository>();
mockRepository.Setup(repo => repo.RemoveEnrollmentAsync(It.IsAny <Enrollment>()))
.Returns(Task.CompletedTask)
.Verifiable();
var service = new EnrollmentService(mockRepository.Object, mockLogger.Object);
async Task act() => await service.RemoveCourseFromStudentAsync(studentId, courseId);
await act();
mockRepository.Verify();
}