public void ShouldUpdateBindableValidationHelperIsValidProperty()
{
const string nameErrorMessage = "Name should not be empty.";
var view = new TestView(new TestViewModel {
Name = string.Empty
});
view.ViewModel.NameRule = view
.ViewModel
.ValidationRule(
viewModelProperty => viewModelProperty.Name,
s => !string.IsNullOrEmpty(s),
nameErrorMessage);
view.OneWayBind(view.ViewModel, vm => vm.NameRule.IsValid, v => v.IsNameValid);
view.OneWayBind(view.ViewModel, vm => vm.NameRule.Message, v => v.NameErrorLabel, s => s.ToSingleLine());
Assert.False(view.IsNameValid);
Assert.Equal(nameErrorMessage, view.NameErrorLabel);
view.ViewModel.Name = "Bingo";
Assert.True(view.IsNameValid);
Assert.Empty(view.NameErrorLabel);
}
