public void Teachers_Controller_Test_On_Delete_Confirmed_With_Existent_Id()
{
//Arrange
Guid id = new Guid("f616cc8c-2223-4145-b7d0-232a1f6f0795");
string firstName = "TestF";
string lastName = "TestL";
string userName = "******";
string password = "******";
string emailAdress = "TestE";
Teacher expectedTeacher = new Teacher(firstName, lastName, userName, password, emailAdress);
expectedTeacher.Id = id;
var repo = Substitute.For <IRepository>();
var sut = new TeachersController(repo);
repo.GetById <Teacher>(id).Returns(expectedTeacher);
//Act
var actual = sut.DeleteConfirmed(id).Result;
//Assert
Assert.IsInstanceOfType(actual, typeof(RedirectToActionResult));
}