FraukeN

    public class SQLiteEntity : IEntity
    {
        [PrimaryKey, AutoIncrement]
        public int Id { get; set; }
    }

FraukeN

    public class ToDoItem : SQLiteEntity
    {
        public string Title { get; set; }
        public string Description { get; set; }
        public ToDoItemState State { get; set; }
    }

FraukeN

    public class MockRepository : IRepository<ToDoItem>
    {
        private List<ToDoItem> _toDoItems { get; set; }

        public MockRepository()
        {
            _toDoItems = new List<ToDoItem>();
            _toDoItems.Add(new ToDoItem { Id = 1, Title = "Buy cat food", Description = "It's either that or be ambushed and gnawed" });
            _toDoItems.Add(new ToDoItem { Id = 2, Title = "Starch underwear", Description = "It ain't safe if it don't chafe" });
            _toDoItems.Add(new ToDoItem { Id = 3, Title = "Start retro girl band", Description = "Frauke and the courgettes" });

FraukeN

    public class OverviewVM
    {
        private MockRepository _toDoRepo;
        public IEnumerable<ToDoItem> ToDoItems { get; set; }

        public OverviewVM()
        {
            _toDoRepo = new MockRepository();
            ToDoItems = _toDoRepo.GetAsync().Result;
        }

FraukeN

using System;
using System.Reflection;
using System.Windows.Input;
using Xamarin.Forms;

namespace EventToCommandBehavior
{
    public class EventToCommandBehavior : BehaviorBase<View>
    {
        Delegate eventHandler;

FraukeN

using System;
using Xamarin.Forms;

namespace EventToCommandBehavior
{
    public class BehaviorBase<T> : Behavior<T> where T : BindableObject
    {
        public T AssociatedObject { get; private set; }

        protected override void OnAttachedTo(T bindable)

FraukeN

    public async Task LoadData()
    {
        ToDoItems = await _toDoRepo.GetAsync();
    }

FraukeN

    public partial class OverviewPage : ContentPage
    {
        private OverviewVM _viewModel;

        public OverviewPage()
        {
            InitializeComponent();
            _viewModel = new OverviewVM();
            BindingContext = _viewModel;
        }

FraukeN

    public class OverviewVM : ViewModelBase
    {
        private MockRepository _toDoRepo;
        
        private IEnumerable<ToDoItem> _toDoItems;
        public IEnumerable<ToDoItem> ToDoItems
        {
            get { return _toDoItems; }
            set { Set(ref _toDoItems, value); }
        }

FraukeN

    [Test]
    public async Task LoadData_loads_data_from_repository()
    {
        // Arrange
        OverviewVM vm = new OverviewVM();

        // Act
        await vm.LoadData();

        // Assert