public void When_Subscribe_With_Two_Node_Path_To_Property_And_Modify_Node_One_Then_OnNext_Changes()
{
// Arrange
var obj = new TestObservableObject {ObservableChild = new TestObservableObject {Age = 3}};
var replacementChild = new TestObservableObject {Age = 5};
var scheduler = new TestScheduler();
var observer = scheduler.CreateObserver<IPropertyChanged<TestObservableObject>>();
var expected = new[]
{
OnNext(000, PropertyChanged.Create(obj.ObservableChild)),
OnNext(010, PropertyChanged.Create(replacementChild)),
OnNext(010, PropertyChanged.Create(replacementChild, "Age")),
};
var sut = obj.WhenAny(x => x.ObservableChild);
// Act
sut.Subscribe(observer);
scheduler.AdvanceTo(10);
obj.ObservableChild = replacementChild;
obj.ObservableChild.Age = 17;
// Assert
Assert.AreEqual(expected, observer.Messages);
}
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_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_Subscribed_Then_OnNext_Changes()
{
// Arrange
var obj = new TestObservableObject {ObservableChild = new TestObservableObject {Age = 3}};
var replacementChild = new TestObservableObject {Age = 5};
var scheduler = new TestScheduler();
var observer = scheduler.CreateObserver<TestObservableObject>();
var expected = new[]
{
OnNext(000, obj.ObservableChild),
OnNext(010, replacementChild),
OnNext(010, replacementChild),
OnNext(020, replacementChild),
};
var sut = obj.WhenAny(x => x.ObservableChild).ForProperty<TestObservableObject>("Age", "Name");
// Act
sut.Subscribe(observer);
scheduler.AdvanceTo(10);
obj.ObservableChild = replacementChild;
obj.ObservableChild.Age = 17;
scheduler.AdvanceTo(20);
obj.ObservableChild.Name = "Billy";
// Assert
Assert.AreEqual(expected, observer.Messages);
}
public void When_Setting_Property_To_Same_Value_Then_Does_Not_Fire_PropertyChanged()
{
// Arrange
var propertyChangedCount = 0;
var sut = new TestObservableObject {Age = 10};
sut.PropertyChanged += (sender, args) => ++propertyChangedCount;
// Act
sut.Age = 10;
// Assert
Assert.AreEqual(0, propertyChangedCount);
}
public void When_Setting_Property_To_New_Value_And_Property_Changed_Suppressed_Then_Does_Not_Fire_PropertyChanged()
{
// Arrange
var propertyChangedCount = 0;
var sut = new TestObservableObject {Age = 10};
sut.PropertyChanged += (sender, args) => ++propertyChangedCount;
// Act
using (sut.SuppressPropertyChanged())
sut.Age = 3;
// Assert
Assert.AreEqual(0, propertyChangedCount);
}
public void When_Setting_Property_To_New_Value_Then_Fires_PropertyChanged()
{
// Arrange
var propertyChanges = new List<PropertyChangedEventArgsEx>();
var sut = new TestObservableObject {Age = 10};
sut.PropertyChanged += (sender, args) => propertyChanges.Add((PropertyChangedEventArgsEx) args);
var expectedPropertyChange = new PropertyChangedEventArgsEx("Age");
// Act
sut.Age = 5;
// Assert
Assert.AreEqual(5, sut.Age);
Assert.AreEqual(1, propertyChanges.Count);
Assert.AreEqual(expectedPropertyChange, propertyChanges[0]);
}
public void When_Subscribe_To_Property_With_Broken_Path_Then_OnNext_Initial_Image_With_Null_Source()
{
// Arrange
var obj = new TestObservableObject();
var scheduler = new TestScheduler();
var observer = scheduler.CreateObserver<IPropertyChanged<TestObservableObject>>();
var expected = new[]
{
OnNext(000, PropertyChanged.Create(default(TestObservableObject))),
};
var sut = obj.WhenAny(x => x.PocoChild.ObservableChild);
// Act
sut.Subscribe(observer);
// Assert
Assert.AreEqual(expected, observer.Messages);
}
public void When_Subscribe_With_One_Node_Path_To_Property_Then_OnNext_Initial_Image_And_Changes()
{
// Arrange
var obj = new TestObservableObject {Age = 5};
var scheduler = new TestScheduler();
var observer = scheduler.CreateObserver<IPropertyChanged<TestObservableObject>>();
var expected = new[]
{
OnNext(000, PropertyChanged.Create(obj)),
OnNext(000, PropertyChanged.Create(obj, "Age")),
};
var sut = obj.WhenAny();
// Act
sut.Subscribe(observer);
obj.Age = 10;
// Assert
Assert.AreEqual(expected, observer.Messages);
}
public void When_Subscribe_Then_Returns_Default_Value_At_Time_Of_Subscribe_And_Subsequent_Values()
{
// Arrange
var obj = new TestObservableObject() {Age = 2};
var scheduler = new TestScheduler();
var observer = scheduler.CreateObserver<IPropertyChanged<TestObservableObject>>();
var expected = new[]
{
OnNext(00, PropertyChanged.Create(obj)),
OnNext(20, PropertyChanged.Create(obj, "Age")),
OnNext(30, PropertyChanged.Create(obj, "Age")),
OnNext(40, PropertyChanged.Create(obj, "Name")),
};
var sut = new NotifyPropertyChangedObservable<TestObservableObject>(obj.ToPropertyValueChangedObservable());
// Act
sut.Subscribe(observer);
scheduler.AdvanceTo(20);
obj.Age = 3;
scheduler.AdvanceTo(30);
obj.Age = 7;
scheduler.AdvanceTo(40);
obj.Name = "Fi";
// Assert
Assert.AreEqual(expected, observer.Messages);
}
public void When_Subscribe_Twice_Then_Correct_Notifications_For_Both_Observers()
{
// Arrange
var obj = new TestObservableObject {Age = 3};
var scheduler = new TestScheduler();
var firstObserver = scheduler.CreateObserver<IPropertyChanged<TestObservableObject>>();
var secondObserver = scheduler.CreateObserver<IPropertyChanged<TestObservableObject>>();
var firstObservserExpected = new[]
{
OnNext(0, PropertyChanged.Create(obj)),
OnNext(0, PropertyChanged.Create(obj, "Age")),
OnNext(20, PropertyChanged.Create(obj, "Age")),
OnNext(50, PropertyChanged.Create(obj, "Age")),
};
var secondObservserExpected = new[]
{
OnNext(50, PropertyChanged.Create(obj)),
OnNext(50, PropertyChanged.Create(obj, "Age")),
};
var sut = new NotifyPropertyChangedObservable<TestObservableObject>(obj.ToPropertyValueChangedObservable());
// Act
sut.Subscribe(firstObserver);
obj.Age = 5;
scheduler.AdvanceTo(20);
obj.Age = 6;
scheduler.AdvanceTo(50);
sut.Subscribe(secondObserver);
obj.Age = 7;
// Assert
Assert.AreEqual(firstObservserExpected, firstObserver.Messages);
Assert.AreEqual(secondObservserExpected, secondObserver.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_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);
}
public void When_Subscribe_Then_Returns_Value_At_Time_Of_Subscribe_And_Subsequent_Values()
{
// Arrange
var sourceObj = new TestObservableObject() {Age = 2};
var scheduler = new TestScheduler();
var observer = scheduler.CreateObserver<IPropertyValueChanged<int>>();
var expected = new[]
{
OnNext(20, PropertyValueChanged.CreateWithValue(sourceObj, "Age", 5)),
OnNext(30, PropertyValueChanged.CreateWithValue(sourceObj, "Age", 3)),
};
var sut = new NotifyPropertyValueChangedObservable<TestObservableObject, int>(sourceObj.ToPropertyValueChangedObservable(), "Age",
x => x.Age);
scheduler.AdvanceTo(10);
sourceObj.Age = 5;
scheduler.AdvanceTo(20);
// Act
sut.Subscribe(observer);
scheduler.AdvanceTo(30);
sourceObj.Age = 3;
// 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);
}
