protected override void OnCreate(Bundle savedInstanceState)
{
base.OnCreate(savedInstanceState);
ViewModel = GetCounterViewModel();
Bind();
}
public void ExecutingTheIncrementCommandShouldIncrementTheValueInTheDatabaseHelper()
{
_mockDatabaseHelper.Setup(d => d.IncrementCounterAsync(It.IsAny<Counter>())).Callback<Counter>(c => ++c.Value);
var counter = new Counter {Value = 10};
var vm = new CounterViewModel(counter, _mockDatabaseHelper.Object, _mockDialogService.Object, _mockNavigationService.Object);
vm.IncrementCommand.Execute(null);
_mockDatabaseHelper.Verify(d => d.IncrementCounterAsync(counter));
vm.Value.Should().Be("11");
}
public void BindCounterViewModel(CounterViewModel counterViewModel)
{
if (_counterViewModel != null)
_counterViewModel.PropertyChanged -= CounterViewModelOnPropertyChanged;
_counterViewModel = counterViewModel;
_counterViewModel.PropertyChanged += CounterViewModelOnPropertyChanged;
_name.Text = counterViewModel.Name;
_description.Text = counterViewModel.Description;
_value.Text = counterViewModel.Value;
}
private static bool Matches(CounterViewModel cvm, Counter counter)
{
return cvm.Name == counter.Name &&
cvm.Description == counter.Description &&
cvm.Value == counter.Value.ToString("N0");
}
public void ExecutingTheSaveCommandUpdatesTheCounterInTheDatabase()
{
var counter = new Counter { Value = 10, Name = "Name", Description = "Description" };
var vm = new CounterViewModel(counter, _mockDatabaseHelper.Object, _mockDialogService.Object, _mockNavigationService.Object);
vm.Name = "New Name";
vm.Description = "New Description";
vm.SaveCommand.Execute(null);
_mockDatabaseHelper.Verify(d => d.AddOrUpdateCounterAsync(counter));
}
public void ExecutingTheSaveCommandUpdatesTheChangesOnTheCounter()
{
var counter = new Counter {Value = 10, Name = "Name", Description = "Description"};
var vm = new CounterViewModel(counter, _mockDatabaseHelper.Object, _mockDialogService.Object, _mockNavigationService.Object);
vm.Name = "New Name";
vm.Description = "New Description";
vm.SaveCommand.Execute(null);
counter.Name.Should().Be("New Name");
counter.Description.Should().Be("New Description");
}
public void ExecutingTheEditCommandNavigatesToTheEditScreen()
{
var counter = new Counter();
var vm = new CounterViewModel(counter, _mockDatabaseHelper.Object, _mockDialogService.Object, _mockNavigationService.Object);
vm.EditCommand.Execute(null);
_mockNavigationService.Verify(n => n.NavigateTo(ViewModelLocator.EditCounterPageKey, counter));
}
public void SaveComandAddsTheCounterAndNavigatesBack()
{
var vm = new CounterViewModel(new Counter(), _mockDatabaseHelper.Object, _mockDialogService.Object, _mockNavigationService.Object);
vm.Name = "Foo";
vm.Description = "Bar";
vm.SaveCommand.Execute(null);
_mockDialogService.Verify(d => d.ShowError(It.IsAny<string>(), It.IsAny<string>(), It.IsAny<string>(), null), Times.Never);
_mockDatabaseHelper.Verify(d => d.AddOrUpdateCounterAsync(It.IsAny<Counter>()), Times.Once);
_mockNavigationService.Verify(n => n.GoBack(), Times.Once);
}
public void SaveCommandRaisesAnErrorIfTheDescriptionIsNotSet()
{
var vm = new CounterViewModel(new Counter(), _mockDatabaseHelper.Object, _mockDialogService.Object, _mockNavigationService.Object);
vm.Name = "Foo";
vm.SaveCommand.Execute(null);
_mockDialogService.Verify(d => d.ShowError(It.IsAny<string>(), It.IsAny<string>(), It.IsAny<string>(), null), Times.Once);
_mockDatabaseHelper.Verify(d => d.AddOrUpdateCounterAsync(It.IsAny<Counter>()), Times.Never);
}
public void GoBackCommandNavigatesBackwards()
{
var vm = new CounterViewModel(new Counter(), _mockDatabaseHelper.Object, _mockDialogService.Object, _mockNavigationService.Object);
vm.GoBackCommand.Execute(null);
_mockNavigationService.Verify(n => n.GoBack(), Times.Once);
}
public void ExecutingTheDeleteCommandAndSelectingNoOnTheDialogDoesNotDeleteTheCounter()
{
var counter = new Counter { Value = 10, Name = "Name", Description = "Description" };
var vm = new CounterViewModel(counter, _mockDatabaseHelper.Object, _mockDialogService.Object, _mockNavigationService.Object);
_mockDialogService.Setup(d => d.ShowMessage($"Are you sure you want to delete {vm.Name}?", "Delete counter", "Yes", "No", null))
.ReturnsAsync(false);
vm.DeleteCommand.Execute(null);
_mockDatabaseHelper.Verify(d => d.DeleteCounterAsync(counter), Times.Never);
}
