public void When_Path_Has_Null_Intermediary_Node_Then_Propagates_ProvertyValueChanged_With_HasValue_False()
{
// Arrange
var childOne = new TestObservableObject {Age = 5};
var childTwo = new TestObservableObject {Age = 17};
var obj = new TestObservableObject {ObservableChild = childOne};
var scheduler = new TestScheduler();
var observer = scheduler.CreateObserver<IPropertyValueChanged<int>>();
var expected = new[]
{
OnNext(000, PropertyValueChanged.CreateWithValue(childOne, "Age", childOne.Age)),
OnNext(000, PropertyValueChanged.CreateWithValue(childOne, "Age", 20)),
OnNext(100, PropertyValueChanged.CreateWithoutValue<TestObservableObject, int>(null, "Age")),
OnNext(300, PropertyValueChanged.CreateWithValue(childTwo, "Age", childTwo.Age)),
};
var sut = obj.When(x => x.ObservableChild.Age);
// Act
sut.Subscribe(observer);
obj.ObservableChild.Age = 20;
scheduler.AdvanceTo(100);
obj.ObservableChild = null;
scheduler.AdvanceTo(300);
obj.ObservableChild = childTwo;
// Assert
Assert.AreEqual(expected, observer.Messages);
}
public void When_Subscribe_With_Two_Node_Path_To_Property_And_Modify_Node_One_Then_OnNext_Changes()
{
// Arrange
var childOne = new TestPoco {Age = 3};
var childTwo = new TestPoco() {Age = 5};
var obj = new TestObservableObject {PocoChild = childOne};
var scheduler = new TestScheduler();
var observer = scheduler.CreateObserver<IPropertyValueChanged<int>>();
var expected = new[]
{
OnNext(000, PropertyValueChanged.CreateWithValue(childOne, "Age", 3)),
OnNext(010, PropertyValueChanged.CreateWithValue(childTwo, "Age", 5)),
};
var sut = obj.When(x => x.PocoChild.Age);
// Act
sut.Subscribe(observer);
scheduler.AdvanceTo(10);
obj.PocoChild = childTwo;
// Assert
Assert.AreEqual(expected, observer.Messages);
}
public void When_Subscribe_Via_Interface_To_Source_That_Impl_INotifyPropertyChanged_Then_OnNext_Changes()
{
// Arrange
var obj = new TestObservableObject {Age = 3} as ITestObject;
var scheduler = new TestScheduler();
var observer = scheduler.CreateObserver<IPropertyValueChanged<int>>();
var expected = new[]
{
OnNext(000, PropertyValueChanged.CreateWithValue(obj, "Age", 3)),
OnNext(010, PropertyValueChanged.CreateWithValue(obj, "Age", 5)),
};
var sut = obj.When(x => x.Age);
// Act
sut.Subscribe(observer);
scheduler.AdvanceTo(10);
obj.Age = 5;
// Assert
Assert.AreEqual(expected, observer.Messages);
}
public void When_Subscribe_With_One_Node_Path_To_Property_Then_OnNext_Changes()
{
// Arrange
var obj = new TestObservableObject {Age = 5};
var scheduler = new TestScheduler();
var observer = scheduler.CreateObserver<IPropertyValueChanged<int>>();
var expected = new[]
{
OnNext(000, PropertyValueChanged.CreateWithValue(obj, "Age", 5)),
};
var sut = obj.When(x => x.Age);
// Act
sut.Subscribe(observer);
// Assert
Assert.AreEqual(expected, observer.Messages);
}
