public void Can_Bind_Completed_Binding_Back_To_Original_Value_When_Ending_Batch_Update()
{
var target = new TestClass();
var raised = 0;
var notifications = new List <AvaloniaPropertyChangedEventArgs>();
var observable1 = new TestObservable <string>("foo");
var observable2 = new TestObservable <string>("foo");
target.Bind(TestClass.FooProperty, observable1);
target.BeginBatchUpdate();
observable1.OnCompleted();
target.PropertyChanged += (sender, e) =>
{
if (e.Property == TestClass.FooProperty && e.NewValue is null)
{
target.Bind(TestClass.FooProperty, observable2);
++raised;
}
notifications.Add(e);
};
target.EndBatchUpdate();
Assert.Equal("foo", target.Foo);
Assert.Equal(1, raised);
Assert.Equal(2, notifications.Count);
Assert.Equal(null, notifications[0].NewValue);
Assert.Equal("foo", notifications[1].NewValue);
}
public void Binding_Completion_Should_Not_Raise_Property_Changes_During_Batch_Update()
{
var target = new TestClass();
var observable = new TestObservable <string>("foo");
var raised = new List <string>();
target.Bind(TestClass.FooProperty, observable, BindingPriority.LocalValue);
target.GetObservable(TestClass.FooProperty).Skip(1).Subscribe(x => raised.Add(x));
target.BeginBatchUpdate();
observable.OnCompleted();
Assert.Empty(raised);
}
public void Binding_Completion_Should_Be_Raised_After_Batch_Update()
{
var target = new TestClass();
var observable = new TestObservable <string>("foo");
var raised = new List <AvaloniaPropertyChangedEventArgs>();
target.Bind(TestClass.FooProperty, observable, BindingPriority.LocalValue);
target.PropertyChanged += (s, e) => raised.Add(e);
target.BeginBatchUpdate();
observable.OnCompleted();
target.EndBatchUpdate();
Assert.Equal(1, raised.Count);
Assert.Null(target.Foo);
Assert.Equal("foo", raised[0].OldValue);
Assert.Null(raised[0].NewValue);
Assert.Equal(BindingPriority.Unset, raised[0].Priority);
}
