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from I select q[0]

•Created by from I select q[0] on 8/31/2023 in #help

✅ unit testing ViemModels

I am very new to unit testing, and I have a typical example where I have a constructor with 4 services 3 of which is DI and one concrete generic for navigation E.g public

cs class ViewModel {

 Public ViewModel ( IB service, IC service, ID service, E<F> navigation) {

}

}

cs class ViewModel {

 Public ViewModel ( IB service, IC service, ID service, E<F> navigation) {

}

}

I have be having problem testing because I need to create a moq of E<F> and because of the way it is setup it's hard to abstract to interface. Does it make sense to create IViewModel And then have Class ViewModel:IViewModel And mock IViewModel instead? Is this the recommended approach? Is this good or bad ?

9 replies

CC#

•Created by from I select q[0] on 4/14/2023 in #help

❔ trying to get published events in one project to the other

I have a Solution with two projects 1. Solution 1a. Project ( winUI3) 1b. Project.core 1a references 1b(core project) --- i am trying to publish events in 1b(core projects) and subscribe to the events in 1a(Ui projects viewmodel)

2 replies

CC#

•Created by from I select q[0] on 2/17/2023 in #help

❔ unable to send messages using MVVMtoolkit messenger

i am trying to pass messages between two viewmodels employeeviewmode and storeviewmodebut it doesn't work

    public class StoreViewModel :BaseViewModel
    {


        public ICommand NavigateEmployeeCommand { get; }
        public StoreViewModel(INavigation storeNav)
        {
            NavigateEmployeeCommand = new NavigateCommand(storeNav);
        }


        protected override void OnActivated()
        {
          Messenger.Register<StoreViewModel, MonthNameMessage>(this, (r, m) => r.MonthMessageReceived= m.Value
            
            );
        }

        private string _monthMessageReceived;
        public string MonthMessageReceived { get => _monthMessageReceived; 
            
            set => SetProperty(ref _monthMessageReceived, value); }

    }

//employee viemodel
    public class EmployeeViewModel:BaseViewModel
    {

        public ICommand NavigateStoreCommand { get; }

        public ICommand SendMessageCommand { get; }
        public EmployeeViewModel(INavigation storeNav)
        {
            NavigateStoreCommand = new NavigateCommand(storeNav);

            SendMessageCommand= new RelayCommand(SendMessage);

        }


        private readonly string _testVariable = "Employee haahahah";
        public string TestVariable
        {
            get => _testVariable;
            
         
        }

        protected override void OnActivated()
        {
            Messenger.Register<EmployeeViewModel, CurrentMonthRequestMessage>(this, (r,m)=> m.Reply(r._testVariable));
        }


        public void SendMessage()
        {
            Messenger.Send(new MonthNameMessage(_testVariable));
        }

    }

//Message classes
public sealed class MonthNameMessage : ValueChangedMessage<string>
    {
        public MonthNameMessage(string value) : base(value)
        {
        }
    }
    public sealed class CurrentMonthRequestMessage:RequestMessage<string>
    {

    }

    public class StoreViewModel :BaseViewModel
    {


        public ICommand NavigateEmployeeCommand { get; }
        public StoreViewModel(INavigation storeNav)
        {
            NavigateEmployeeCommand = new NavigateCommand(storeNav);
        }


        protected override void OnActivated()
        {
          Messenger.Register<StoreViewModel, MonthNameMessage>(this, (r, m) => r.MonthMessageReceived= m.Value
            
            );
        }

        private string _monthMessageReceived;
        public string MonthMessageReceived { get => _monthMessageReceived; 
            
            set => SetProperty(ref _monthMessageReceived, value); }

    }

//employee viemodel
    public class EmployeeViewModel:BaseViewModel
    {

        public ICommand NavigateStoreCommand { get; }

        public ICommand SendMessageCommand { get; }
        public EmployeeViewModel(INavigation storeNav)
        {
            NavigateStoreCommand = new NavigateCommand(storeNav);

            SendMessageCommand= new RelayCommand(SendMessage);

        }


        private readonly string _testVariable = "Employee haahahah";
        public string TestVariable
        {
            get => _testVariable;
            
         
        }

        protected override void OnActivated()
        {
            Messenger.Register<EmployeeViewModel, CurrentMonthRequestMessage>(this, (r,m)=> m.Reply(r._testVariable));
        }


        public void SendMessage()
        {
            Messenger.Send(new MonthNameMessage(_testVariable));
        }

    }

//Message classes
public sealed class MonthNameMessage : ValueChangedMessage<string>
    {
        public MonthNameMessage(string value) : base(value)
        {
        }
    }
    public sealed class CurrentMonthRequestMessage:RequestMessage<string>
    {

    }

2 replies

CC#

•Created by from I select q[0] on 10/7/2022 in #help

can anybody recommend where I can learn about file format encoding internals e.g pdf, doc, epubs

6 replies

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