public void GetTutorial_Success_Test()
{
// Arrange
int id = 1;
R_Tutorial tutorial = SampleTutorial(id);
// create mock for repository
var mock = new Mock <ITutorialRepository>();
mock.Setup(s => s.GetTutorial(Moq.It.IsAny <int>())).Returns(tutorial);
// service
TutorialService tutorialService = new TutorialService();
TutorialService.Repository = mock.Object;
// Act
TutorialDTO result = tutorialService.GetTutorial(id);
// Assert
Assert.IsNotNull(result);
Assert.AreEqual(1, result.TutorialId);
}