public void SetErrorMessageInViewModel_IfNoChanges()
{
// Arrange
var errorMessage = "Something is wrong!";
var mockedView = new Mock <IAddNewClassView>();
mockedView.Setup(v => v.Model).Returns(new AddNewClassViewModel());
var mockedTeacherService = new Mock <ITeacherService>();
mockedTeacherService.Setup(s => s.Save()).Returns(0);
mockedTeacherService.Setup(s => s.FindById(It.IsAny <string>())).Verifiable();
var mockedStudentClassService = new Mock <IStudentClassService>();
mockedStudentClassService.Setup(s => s.Add(It.IsAny <StudentClass>())).Verifiable();
var mockedStudentClassFactory = new Mock <IStudentClassFactory>();
mockedStudentClassFactory.Setup(f => f.CreateClass(It.IsAny <string>(), It.IsAny <string>())).Verifiable();
var presenter = new AddNewClassPresenter(mockedView.Object, mockedStudentClassService.Object, mockedTeacherService.Object, mockedStudentClassFactory.Object);
var ev = new AddNewClassEventArgs(null, null);
// Act & Assert
Assert.DoesNotThrow(() => mockedView.Raise(v => v.CreateClassClick += null, ev));
Assert.AreEqual(errorMessage, mockedView.Object.Model.ErrorMessage);
Assert.IsFalse(mockedView.Object.Model.IsSuccess);
// Verify that the method is stopped and other dependencies are not called
mockedTeacherService.Verify(s => s.Save(), Times.Never);
mockedTeacherService.Verify(s => s.FindById(It.IsAny <string>()), Times.Never);
mockedStudentClassService.Verify(s => s.Add(It.IsAny <StudentClass>()), Times.Once);
}
public void View_CreateClassClick(object sender, AddNewClassEventArgs e)
{
try
{
var stClass = this.studentClassFactory.CreateClass(e.ClassName, e.TeacherId);
this.studentClassService.Add(stClass);
}
catch (ArgumentException ex)
{
this.View.Model.IsSuccess = false;
this.View.Model.ErrorMessage = ex.Message;
return;
}
int changes = 0;
try
{
changes = this.studentClassService.Save();
}
catch (Exception ex)
{
this.View.Model.IsSuccess = false;
this.View.Model.ErrorMessage = "Something`s wrong. Maybe this class already exist.";
return;
}
if (changes <= 0)
{
this.View.Model.IsSuccess = false;
this.View.Model.ErrorMessage = "Something is wrong!";
}
else
{
this.ChangeTeacherState(e.TeacherId);
this.View.Model.IsSuccess = true;
}
}
