public void SuppressNotificationExpression()
{
var counter = 0;
var vm = new TestVM();
vm.PropertyChanged += (s, a) => counter++;
// initial value
vm.MyProperty = 0;
counter = 0;
vm.MyProperty = 42;
Assert.AreEqual(1, counter, "PropertyChanged was not raised, ViewModel is broken.");
vm.SuppressNotifications(() => vm.MyProperty);
vm.MyProperty = 21;
Assert.AreEqual(1, counter, "PropertyChanged was raised after SuppressNotifications.");
}
public void RestoreNotificationExpression()
{
var counter = 0;
var vm = new TestVM();
vm.PropertyChanged += (s, a) => counter++;
vm.SuppressNotifications(() => vm.MyProperty);
// initial value
vm.MyProperty = 0;
counter = 0;
vm.MyProperty = 42;
Assert.AreEqual(0, counter, "PropertyChanged was raised after SuppressNotifications.");
vm.RestoreNotifications(() => vm.MyProperty);
Assert.AreEqual(1, counter, "PropertyChanged was not raised after RestoreNotifications");
}
public void SuppressNotificationExpression_Fail()
{
var vm = new TestVM();
vm.SuppressNotifications(() => 42);
}
