public void When_Path_Has_Null_Intermediary_Node_Then_Skips_When_Invalid_Path()
{
// 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<int>();
var expected = new[]
{
OnNext(000, childOne.Age),
OnNext(000, 20),
OnNext(300, childTwo.Age),
};
var sut = obj.WhenValue(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_One_Node_Path_To_Property_Then_OnNext_Changes()
{
// Arrange
var obj = new TestObservableObject {Age = 5};
var scheduler = new TestScheduler();
var observer = scheduler.CreateObserver<int>();
var expected = new[]
{
OnNext(000, 5),
};
var sut = obj.WhenValue(x => x.Age);
// Act
sut.Subscribe(observer);
// Assert
Assert.AreEqual(expected, observer.Messages);
}
public void When_Subscribe_With_Two_Node_Path_To_Property_And_Modify_Property_Then_OnNext_Changes()
{
// Arrange
var obj = new TestObservableObject {ObservableChild = new TestObservableObject {Age = 3}};
var scheduler = new TestScheduler();
var observer = scheduler.CreateObserver<int>();
var expected = new[]
{
OnNext(000, 3),
OnNext(010, 5),
};
var sut = obj.WhenValue(x => x.ObservableChild.Age);
// Act
sut.Subscribe(observer);
scheduler.AdvanceTo(10);
obj.ObservableChild.Age = 5;
// Assert
Assert.AreEqual(expected, observer.Messages);
}